CRC · California Residential Code

Water system testing & meter/inspection requirements

Q: What if we have no alternate water source — do we still need the cross‑connection test?

Yes — the cross‑connection procedure still governs initial commissioning: where an alternate system is not present, the code allows a temporary potable connection for performing the test or omits the alternate leg, but the AHJ must witness the required potable pressurization and verify no cross‑connection. See Chapter 1502.3.2.

Q: Is 50 ppm chlorine always required after piping work?

The 50 ppm for 24 hours chlorination step appears in the recycled/alternate water commissioning excerpts for potable system recharging; whether it applies to all potable piping work depends on the system and AHJ (the code excerpt prescribes it for potable systems after dual‑system testing in recycled water contexts). Confirm with AHJ; see CPC recycled water commissioning text.

Q: Who inspects submeters and who keeps test records?

Submeter approvals and testing are subject to state testing rules referenced by § 601.2.1. The installer/owner must provide test records and submittals to the AHJ; submeters must be approved per Business & Professions Code and the cited Title 4 regs.

Q: How long must I keep water test and bacteriology records?

The CPC excerpts require records be available for inspection and imply retention as required by the AHJ or referenced regulations (e.g., operation/maintenance logs for potable rainwater). For specific retention durations check the AHJ and the referenced Title 22/other state regs.

Q: My inspector asked for a “cross‑connection visual checklist” — what should it include?

At minimum: meter locations, valve lock seals intact, equipment room signage, pump and equipment verification, visible cross‑connections, and confirmation that temporary connections (if any) were removed after testing. Those items are in the visual inspection requirements in Chapter 1502.3.1.

Homeowner summary: Before new or altered water piping is put into service, the plumbing code requires that the system be pressure‑tested, checked for any connection between potable and nonpotable pipes, and (when required) disinfected and lab‑tested. For new multiunit rental buildings, individual dwelling **submeters** are normally required. The Authority Having Jurisdiction must witness initial cross‑connection testing and accept the records before final approval.

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Last reviewed: July 6, 2026

What the code requires — plain English (controlling §)

In short: new or altered potable and alternate water distribution systems must be tested, isolated and inspected during commissioning to verify there are no cross‑connections, that piping is pressure‑tight, and that potable systems are disinfected and bacteriologically cleared before service. The technical testing and commissioning steps for water systems are handled in the plumbing chapters adopted by the CRC — see § 609.4 (Testing) in the California Plumbing Code and related cross‑connection testing procedures in Chapter 1502 (alternate water sources) adopted into the California code set.
Separately, the CRC/plumbing provisions require submeters where new multiunit rental residential buildings supply potable or recycled water to individual dwelling units — see § 601.2.1 (Submeters) for the meter/inspection/testing rules that apply to submeters.

The single most important rule: all potable (and alternate) water systems must be tested and inspected by the Authority Having Jurisdiction and shown free of cross‑connections and biologically safe before being put into service (see § 609.4 and the cross‑connection/testing procedures adopted into the California codes).

Note: I could not locate the text of § 105.2.1.1 in the copy of the California Residential Code files you provided; it does not appear in the returned CRC excerpts. If you want requirements specifically quoted from § 105.2.1.1, please upload that page or allow a targeted search — I will then incorporate its exact text and citation.

Requirements in detail

Scope — what systems are covered

Potable water distribution piping (building supply, risers, branch piping): testing, sizing and commissioning requirements are in the Plumbing Code chapters referenced/adopted by the CRC (see § 609.4 and Chapter 6 sizing/testing provisions).
Alternate water sources (reclaimed/recycled water, graywater, rainwater): additional initial and periodic cross‑connection testing, visual inspection and sign/valve verification are required before operation (see Chapter 1502 / 1505 series).
Submetering for new multiunit rental residential buildings is required for measuring potable and recycled water used exclusively by each dwelling unit unless a statutory exemption applies.

Test types and minimum actions (decision‑relevant)

Decision / value	What the code requires	Code reference
Type of commissioning test	Pressure test, cross‑connection test/isolation, disinfection (where required), and final AHJ inspection and approval before service.	§ 609.4; Chapter 1502 cross‑connection sequence.
Cross‑connection test — sequence	Potable system pressurized while alternate is shut down and drained; then reverse (alternate pressurized while potable drained). Tests performed in presence of AHJ.	Chapter 1502.3.2: minimum sequence and test observations.
Minimum depressurization period (initial test)	Each system shall remain depressurized for the AHJ‑specified minimum; in no case less than 1 hour during cross‑connection testing.	Chapter 1502.3.2 (minimum 1 hour).
Disinfection of potable system after work	Where required, chlorinate to ~50 ppm for 24 hours, then flush and perform bacteriological testing; accept results before recharging the potable system.	Recycled/alternate system commissioning & potable recharging procedures (50 ppm / 24 h) in CPC Chapter 1505 excerpts.
Final records & AHJ presence	Initial cross‑connection test and visual inspection must be performed in the presence of the Authority Having Jurisdiction; records retained as required.	Chapter 1502.3.1 / 1502.3.2.
Submeter required when?	A newly constructed multiunit rental residential structure (or mixed‑use with dwelling units) must have submeters installed to measure potable and reclaimed water supplied exclusively to an individual dwelling unit (subject to exemptions listed).	§ 601.2.1 (Submeters).
Submeter testing standard	Submeter testing must follow the California rules referenced (Title 4 Div. 9 Chapter 3, Civil Code, Business & Professions Code). See CPC § 601.2.1.2.	§ 601.2.1.2 (Submeter testing).
Meter / building supply sizing inputs	Meter and building supply size determined from: available pressure at meter; total fixture units; developed length; elevation difference. Size the meter/building supply per Table/Section 610.4 / 610.8 (or Appendix A method).	§§ 610.7, 610.8 (Sizing of meter/building supply).

(References above point to plumbing code chapters adopted into the California code set; see the CPC table of contents and chapter references for § 609.4 Testing and the meter/submeter provisions cited.)

Who must be present / who does the testing

The Authority Having Jurisdiction (AHJ) must be present for the initial cross‑connection test and visual system inspection and must rule the test successful before final approval/occupation. Chapter 1502 cross‑connection steps explicitly require AHJ presence.
Submeters must be approved and tested to state standards (Business & Professions, Civil Code and Title 4 regs) and installed per manufacturer instructions; submeter testing standards are referenced in § 601.2.1.2.

Exceptions & special cases

Submeter exemptions: certain uses are exempt from submetering (long‑term health care facilities, low‑income housing definitions, residential care facilities for elderly, campus housing, time‑share, etc.). See the statutory exemptions listed under § 601.2.1.
Recycled/reclaimed water and on‑site treated graywater have specialized, more stringent visual and cross‑connection inspection and annual/periodic inspection rules; those are in the alternate water source/recycled water chapters (1501–1506, 1505.14 etc.). These systems must also be color‑coded, signed and have isolation valves tested.
Temporary potable connection for testing: when an alternate source is not available for the initial test, a temporary potable connection is allowed for the test but must be removed at the conclusion of testing (see Chapter 1502.3.2).

Common mistakes (what inspectors see most)

Not scheduling or performing the required AHJ‑observed cross‑connection test; installers run tests without the AHJ and assume approval. The code requires AHJ presence for the initial cross‑connection test.
Failing to fully isolate and drain the alternate system during the potable pressurization test (or vice versa) — leads to false test results. Chapter 1502 requires complete shut‑down/drain during each leg of the test.
Skipping chlorination and bacteriological testing after piping work on potable systems where reuse/disinfection is required (the 50 ppm / 24‑hour chlorination and subsequent lab testing step).
Installing submeters that are not approved or not tested to state rules (fit/accuracy/installation); CPC § 601.2.1.1–.2 require approval and testing procedures.
Sizing the meter/building supply without checking available pressure or developed length — meter sizing rules in § 610.* require these inputs to ensure pressures/velocities are adequate.

Worked example — new 4‑unit rental building (concrete steps)

Assumptions: new 4‑unit rental building, each unit has typical fixtures (total equivalent fixture units = 18 WSFU), available water pressure at meter = 50 psi, developed length to most remote fixture = 150 ft.

Submeter requirement: Because this is a new multiunit rental residential structure, install individual submeters for potable (and reclaimed, if present) to measure each dwelling’s exclusive use, per § 601.2.1. Arrange for submeters that are approved and plan for required state submeter testing per § 601.2.1.2.
Meter and building supply sizing: Determine total fixture units (18), developed length (150 ft), and elevation difference (assume 15 ft). Use the CPC sizing method (Table 610.4 or Appendix A method) to select the building supply pipe and meter size — follow inputs required in § 610.7 / § 610.8 (pressure at meter, fixture units, developed length, elevation). Submit sizing calculations on plumbing submittal.
Testing & commissioning sequence (initial):
- Arrange initial visual inspection and schedule the AHJ to witness cross‑connection testing (Chapter 1502).
- Perform first leg: pressurize potable system; shut down and drain alternate (if none, that leg is not applicable). Keep potable pressurized for the AHJ‑specified period (not less than 1 hour when alternate is empty per Chapter 1502). Inspect outlet flows/drains for unexpected flow indicating cross‑connection.
- Perform second leg: depressurize potable, pressurize alternate (if applicable); AHJ observes. If alternate is unavailable, provide temporary connection for test and remove afterwards.
- If potable piping was opened for construction or connected to alternate sources for testing, chlorinate potable system to 50 ppm for 24 hours, flush, and obtain bacteriological samples — accept results before recharging system.
Documentation: deliver test reports, bacteriological lab results (if required), and submeters’ test/certification records to AHJ per the adopted code submittal requirements.

Related provisions (quick list)

§ 601.2.1 — Submeters (installation, exemptions, testing references).
§ 610.7 / § 610.8 — Conditions and method for sizing meter and building supply pipe.
§ 609.4 — Testing (water system testing chapter heading — plumbing code table of contents).
Chapter 1502 (1502.1–1502.3) — Alternate water source inspection and cross‑connection testing procedures (visual inspection, cross‑connection test sequence, AHJ presence).
§ 1505.14 / § 1505.16 — Recycled water system inspection, minimum water quality & periodic inspection/maintenance.
§ 712.1–712.3 — Testing of drainage and vent systems (water and air tests; minimum test heads and times).

If you want, I can:

Pull the exact text for § 609.4 and § 105.2.1.1 (if present) from your CRC file set if you upload the page(s) containing those sections; or
Produce a compliance checklist / permit inspection form tailored to your local AHJ (based on the CPC/CRC excerpts cited above).

Code references

Grounded in the retrieved California Residential Code — click a citation to read the verbatim passage:

CRC § 1505.14.2.1 Medium relevance — show source text
(1) Notify the Authority Having Jurisdiction of the cross-connection.

(2) The reclaimed (recycled) water piping to the building and its premises shall be shut down at the meter, and the reclaimed (recycled) water riser shall be drained.

(3) Potable water piping to the building and its premises shall be shut down at the meter.

(4) The cross-connection shall be uncovered and disconnected.

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ALTERNATE WATER SOURCES FOR NONPOTABLE APPLICATIONS

(5) The building and its premises shall be retested in accordance with Section 1505.14.2.1 and

Section 1505.14.2.2.

(6) The potable water system shall be chlorinated with 50 parts-per-million (ppm) chlorine for 24 hours.

(7) The potable water system shall be flushed after 24 hours, and a standard bacteriological test shall be performed. Where test results are acceptable, the potable water system shall be permitted to be recharged. 1505.14.2.4 Periodic Inspection. Periodic visual inspections of recycled water supply systems shall be required by the recycled water supplier or designee following the procedures in Section 1505.14.2.1. Pursuant to California Code of Regu- lations, Title 22, Section 60316, annual visual inspections shall be required for recycled water sup- ply systems that are within or a part of a building. 1505.15 Minimum Water Quality Requirements for Reclaimed (Recycled) Water. The minimum water qual- ity for reclaimed (recycled) water shall meet the applicable water quality requirements of California Code of Regulations, Title 22, Division 4, Chapter 3 (commencing with Section 60301) for disinfected tertiary recycled water and the appli- cable reclaimed (recycled) water use. The reclaimed (recy- cled) water supplier shall supply water in accordance with permits issued by the State Water Resources Control Board or Regional Water Quality Control Board. 1505.16 Maintenance and Inspection. Recycled water supply systems and components shall be inspected and main- tained in accordance with the manufacturer’s recommendations and/or as required by the Authority Having Jurisdiction. The frequency of testing, inspection, and maintenance shall be in accordance with Table 1505.16. The required inspection and maintenance shall be the responsibility of the property owner, unless otherwise required by the Authority Having Jurisdiction.

1506.0 On-Site Treated Nonpotable Gray Water Sys- tems.

1506.1 General. The provisions of this section shall apply to the installation, construction, alteration, and repair of onsite treated nonpotable gray water systems intended to supply uses such as water closets, urinals, trap primers for floor

drains and floor sinks, above and belowground irrigation, and other uses approved by the Authority Having Jurisdiction.
CRC § 1501.9. Medium relevance — show source text
“TO CONSERVE WATER, THIS BUILDING USES ON-SITE TREATED NONPOTABLE GRAYWATER TO

FLUSH TOILETS AND URINALS.”

1501.9. 2 Equipment Room Signs. Each room containing on-site treated nonpotable gray water equipment shall have a sign posted in a location that is visible to anyone working on or near nonpotable gray water equipment with the following wording in 1 inch (25.4 mm) letters:

“CAUTION: ON-SITE TREATED NONPOTABLE GRAY-

WATER, DO NOT DRINK. DO NOT CONNECT TO DRINKING WATER SYSTEM. NOTICE: CONTACT

BUILDING MANAGEMENT BEFORE PERFORMING

ANY WORK ON THIS WATER SYSTEM.”

1501.10 System Controls. Controls for pumps, valves, and other devices that contain mercury that come in contact with alternate water source water supply shall not be permitted.

1502.0 Inspection and Testing.

1502.1 General. Alternate water source systems shall be inspected and tested in accordance with Section 1502.2 through Section 1502.3.3, and/or as required by the Author- ity Having Jurisdiction .

Exception: [DWR] Recycled water supply systems that are within or a part of a building shall comply with Section 1505.14.

1502.2 Supply System Inspection and Test. Alternate water source systems shall be inspected and tested in accordance with this code for testing of potable water piping.

1502.3 Cross-Connection Inspection and Testing. An initial visual inspection and initial cross-connection test shall be performed on both the potable and alternate water source systems before the initial operation of the alternate water source system. During an initial or subsequent cross-con- nection test, the potable and alternate water source system shall be isolated from each other and independently inspected and tested to ensure there is no cross-connection in accor dance with Section 1502.3.1 through Section 1502.3.3 .

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ALTERNATE WATER SOURCES FOR NONPOTABLE APPLICATIONS

1502.3.1 Visual System Inspection. Before commencing the cross-connection testing, a dual system inspection shall be conducted by the Authority Having Jurisdiction and other authorities having jurisdiction as follows:

(1) Meter locations of the alternate water source and potable water lines shall be checked to verify that no modifications were made and that no cross-con nections are visible.

(2) Pumps and equipment, equipment room signs and exposed piping in equipment room shall be checked.

(3) Valves shall be checked to ensure that the valve lock seals are still in place and intact. Valve control door signs shall be checked to verify that no signs have been removed.

1502.3.2 Cross-Connection Test. A cross-connec- tion test shall be performed in the presence of the Authority Having Jurisdiction or other authorities having jurisdiction to determine whether a cross-connection has occurred as follows:

(1) The potable water system shall be activated and pressurized. The alternate water source system shall be shut down, depressurized, and drained.
CRC § 1603.13 Medium relevance — show source text
1603.13 Pumps. Pumps serving rainwater catchment systems shall be listed. Pumps supplying water to water closets, urinals, and trap primers shall be capable of delivering not

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NONPOTABLE RAINWATER CATCHMENT SYSTEMS

CAUTION NONPOTABLE RAINWATER, DO NOT DRINK. DO NOT CONNECT TO DRINKING WATER

SYSTEM. NOTICE: CONTACT BUILDING MANAGE MENT BEFORE PERFORMING ANY WORK ON THIS

WATER SYSTEM.

This sign shall be posted in a location that is visible to anyone working on or near rainwater equipment.

1605.0 Inspection and Testing. 1605.1 General. Rainwater catchment systems shall be inspected and tested in accordance with Section 1605.2 and Section 1605.3.

1605.2 Supply System Inspection and Test. Rainwater catchment systems shall be inspected and tested in accordance with the applicable provisions of this code for testing of potable water and storm drainage systems. Storage tanks shall be filled with water to the overflow opening for a period of 24 hours, and during the inspection, or by other means as approved by the Authority Having Jurisdiction. Seams and joints shall be exposed during the inspection and checked for watertightness. 1605.3 Cross-Connection Inspection and Testing. An initial visual inspection and an initial cross-connection test shall be performed on both the potable and rainwater catchment water systems before the initial operation of the rain- water catchment system. During an initial or subsequent cross-connection test, the potable and rainwater catchment water systems shall be isolated from each other and independently inspected and tested to ensure there is no crossconnection in accordance with Section 1602.5. Initial or subsequent inspections or tests shall be performed in accordance with Section 1605.3.1 through Section 1605.3.3 . 1605.3.1 Visual System Inspection. Prior to commencing the cross-connection testing, a dual system inspection shall be conducted by the Authority Having Jurisdiction and other authorities having jurisdiction as follows:

(1) Pumps, equipment, equipment room signs, and exposed piping in an equipment room shall be checked.

1605.3.2 Cross-Connection Test. A cross-connec- tion test shall be performed in the presence of the Authority Having Jurisdiction or other authorities having jurisdiction to determine whether a cross-connection has occurred as follows:

(1) The potable water system shall be activated and pressurized. The rainwater catchment water system shall be shut down and completely drained.

(2) The potable water system shall remain pressurized for a minimum period of time specified by the Authority Having Jurisdiction while the rainwater catchment water system is empty. The minimum period the rainwater catchment water system is to remain depressurized shall be determined on a caseby-case basis, taking into account the size and complexity of the potable and rainwater catchment water distribution systems, but in no case shall that period be less than 1 hour.

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CRC § 101.5.1 Medium relevance — show source text

K 101.5.1 Frequency. Potable rainwater catchment systems and components shall be inspected and maintained in accordance with Table K 101.5.1 unless more

frequent inspection and maintenance are required by the manufacturer.

K 101.5.2 Maintenance Log. A maintenance log for potable rainwater catchment systems shall be maintained by the property owner and be available for inspection. The property owner or designated appointee shall ensure that a record of testing, inspection, and maintenance in accordance with Table K 101.5.1 is maintained in the log. The log will indicate the frequency of inspection, and maintenance of each system. A record of the required water quality tests shall be retained for not less than 2 years.

K 101.5.3 Maintenance Responsibility. The required maintenance and inspection of potable rainwater catchment systems shall be the responsibility of the property owner unless otherwise required by the Authority Having Jurisdiction.

K 101.6 Operation and Maintenance Manual. An operation and maintenance manual for potable rainwater catchment systems shall be supplied to the building owner by the system designer. The operating and maintenance manual shall include the following:

(1) Detailed diagram of the entire system and the location of system components.

(2) Instructions for operating and maintaining the system.

(3) Details on maintaining the required water quality as determined by the Authority Having Jurisdiction.

(4) Details on deactivating the system for maintenance, repair, or other purposes.

(5) Applicable testing, inspection, and maintenance frequencies in accordance with Table K 101.5.1.

(6) A method of contacting the manufacturer(s).

K 101.7 Minimum Water Quality Requirements. The minimum water quality for potable rainwater catchment systems shall comply with the applicable water quality requirements as determined by the Authority Having Jurisdiction. In the absence of water quality requirements, the guidelines EPA/600/R12/618 contains recommended water reuse guidelines to assist regulatory agencies develop, revise, or expand alternate water source water quality standards.

K 101.8 Material Compatibility. In addition to the requirements of this appendix, potable rainwater catchment systems shall be constructed of materials that are compatible with the type of pipe and fitting materials and water conditions in the system.

K 101.9 System Controls. Controls for pumps, valves, and other devices that contain mercury that come in contact with the water supply shall not be permitted.

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APPENDIX K

TABLE K 101.5.1 MINIMUM POTABLE RAINWATER CATCHMENT SYSTEM TESTING, INSPECTION, AND MAINTENANCE FREQUENCY

DESCRIPTION	MINIMUM FREQUENCY
Inspect and clean filters and screens, and replace (where necessary).	Every 3 months
Inspect and verify that disinfection, filters and water quality treatment devices and systems are operational. Perform water quality tests in accordance with the Author- ity Having Jurisdiction.	In accordance with the manufacturer’s instructions, and the Authority Having Jurisdiction.
Perform applicable water quality tests to verify compliance with Section K 104.3.	Every 3 months
Perform a water quality test for E. Coli, Total Coliform, and Heterotrophic bacte- ria.

CRC § 1502.3.1 Medium relevance — show source text
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ALTERNATE WATER SOURCES FOR NONPOTABLE APPLICATIONS

1502.3.1 Visual System Inspection. Before commencing the cross-connection testing, a dual system inspection shall be conducted by the Authority Having Jurisdiction and other authorities having jurisdiction as follows:

(1) Meter locations of the alternate water source and potable water lines shall be checked to verify that no modifications were made and that no cross-con nections are visible.

(2) Pumps and equipment, equipment room signs and exposed piping in equipment room shall be checked.

(3) Valves shall be checked to ensure that the valve lock seals are still in place and intact. Valve control door signs shall be checked to verify that no signs have been removed.

1502.3.2 Cross-Connection Test. A cross-connec- tion test shall be performed in the presence of the Authority Having Jurisdiction or other authorities having jurisdiction to determine whether a cross-connection has occurred as follows:

(1) The potable water system shall be activated and pressurized. The alternate water source system shall be shut down, depressurized, and drained.

(2) The potable water system shall remain pressurized for a minimum period specified by the Authority Having Jurisdiction while the alternate water source system is empty. The minimum period the alternate water source system is to remain depressurized shall be determined on a case-by-case basis, taking into account the size and complexity of the potable and the alternate water source distribution systems, but in no case shall that period be less than 1 hour.

(3) The drain on the alternate water source system shall be checked for flow during the test and fixtures, potable and alternate water source, shall be tested and inspected for flow. Flow from an alternate water source system outlet indicates a cross-connection. No flow from a potable water outlet shall indicate that it is connected to the alternate water source sys tem.

(4) The potable water system shall then be depressurized and drained.

(5) The alternate water source system shall then be activated and pressurized. When an alternate water source is not available for the initial cross-connec- tion test, a temporary connection to a potable water supply shall be required. At the conclusion of the ini- tial cross-connection test, the temporary connection to the potable water supply shall be disconnected.

(6) The alternate water source system shall remain pressurized for a minimum period specified by the Authority Having Jurisdiction while the potable water system is empty. The minimum period the potable water system is to remain depressurized shall be determined on a case-by-case basis, but in no case shall that period be less than 1 hour.

(7) Fixtures, potable, and alternate water source shall be tested and inspected for flow. Flow from a potable water system outlet indicates a cross-connection. No flow from an alternate water source outlet will indicate that it is connected to the potable water system.

(8) The drain on the potable water system shall be checked for flow during the test and at the end of the

test.
CRC § 610.3 Medium relevance — show source text
No water filter, water softener, backflow prevention device, or similar device regulated by this code shall be installed in a potable water supply piping where the installation of such device produces an excessive pressure drop in such water supply piping. In the absence of specific pressure drop information, the diameter of the inlet or outlet of such device or its connecting piping shall be not less than the diameter of such water distribution piping to the fixtures served by the device.

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WATER SUPPLY AND DISTRIBUTION

Such devices shall be of a type approved by the Authority Having Jurisdiction and shall be tested for flow rating and pressure loss by an approved laboratory or recognized testing agency to standards consistent with the intent of this chapter. 610.3 Quantity of Water. The quantity of water required to be supplied to every plumbing fixture shall be represented by fixture units, as shown in Table 610.3. Equivalent fixture values shown in Table 610.3 include both hot and cold water demand.

610.4 Sizing Water Supply and Distribution Systems. Systems within the range of Table 610.4 shall be permitted to be sized from that table or by the method in accordance with Section 610.5.

Listed parallel water distribution systems shall be installed in accordance with their listing, but at no time shall a portion of the system exceed the maximum velocities allowed by the code. 610.5 Sizing per Appendices A, C, and M . Except as provided in Section 610.4, the size of each water piping system shall be determined in accordance with the procedure set forth in Appendix A. For alternative methods of sizing water supply systems, see Appendix C or Appendix M . 610.6 Friction and Pressure Loss. Except where the type of pipe used and the water characteristics are such that no decrease in capacity due to the length of service (age of system) is expected, friction-loss data shall be obtained from the “Fairly Rough” or “Rough” charts in Appendix A of this code. Friction or pressure losses in a water meter, valve, and fittings shall be obtained from the same sources. Pressure losses through water-treating equipment, backflow prevention devices, or other flow-restricting devices shall be computed in accordance with Section 610.2. 610.7 Conditions for Using Table 610.4. On a proposed water piping installation sized using Table 610.4, the following conditions shall be determined:

(1) Total number of fixture units as determined from Table 610.3, Equivalent Fixture Units, for the fixtures to be installed.

(2) Developed length of supply pipe from meter to the most remote outlet.

(3) Difference in elevation between the meter or other source of supply and the highest fixture or outlet.

(4) Pressure in the street main or another source of supply at the locality where the installation is to be made.

(5) In localities where there is a fluctuation of pressure in the main throughout the day, the water piping system shall be designed on the basis of the minimum pressure available. 610.8 Size of Meter and Building Supply Pipe Using Table 610.4. The size of the meter and the building supply pipe shall be determined as follows:

(1) Determine the available pressure at the water meter or other source of supply.
CRC § 609.4 Medium relevance — show source text
609.4 Testing . . . . . . . . . . . . . . . . . . . . .155

609.5 Unions . . . . . . . . . . . . . . . . . . . . .155

609.6 Location . . . . . . . . . . . . . . . . . . . .155

609.7 Abutting Lot . . . . . . . . . . . . . . . . .155

609.8 Pumps . . . . . . . . . . . . . . . . . . . . .155

609.9 Low-Pressure Cutoff Required on Booster Pumps for Water Distribution Systems . . . . . . . . . . .156

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TABLE OF CONTENTS

609.10 Disinfection of Potable Water System . . . . . . . . . . . . . . . . . . . . .156

609.11 Water Hammer . . . . . . . . . . . . . . .156

609.12 Pipe Insulation . . . . . . . . . . . . . . .156

610.0 Size of Potable Water Piping . . . .156

610.1 Size . . . . . . . . . . . . . . . . . . . . . . . .156

610.2 Pressure Loss . . . . . . . . . . . . . . . .156

610.3 Quantity of Water . . . . . . . . . . . . .157

610.4 Sizing Water Supply and Distribution Systems . . . . . . . . . . .157

610.5 Sizing per Appendices A, C, and M . . . . . . . . . . . . . . . . .157

610.6 Friction and Pressure Loss . . . . . .157

610.7 Conditions for Using Table 610.4 . . . . . . . . . . . . . . . . . .157

610.8 Size of Meter and Building Supply Pipe Using Table 610.4 . .157

610.9 Size of Branches . . . . . . . . . . . . .157

610.10 Sizing for Flushometer Valves . . .157

Table 610.10 Flushometer Fixture Units for Water Sizing Using Table 610.3 . . . . . . . . . . . . . . . . . .157

Table 610.3 Water Supply Fixture Units (WSFU) and Minimum Fixture Branch Pipe Sizes . . . . . . . . . . . .158

Table 610.4 Fixture Unit Table for

Determining Water Pipe and Meter Sizes . . . . . . . . . . . . . .159

610.11 Sizing Systems for Flushometer Tanks . . . . . . . . . . . .160

610.12 Sizing for Velocity . . . . . . . . . . . . .160

610.13 Exceptions . . . . . . . . . . . . . . . . . .160

611.0 Drinking Water Treatment Units . . . . . . . . . . . . . . . . . . . . . . .160

611.1 Application . . . . . . . . . . . . . . . . . .160
CRC § 1505.14 Medium relevance — show source text
1505.14 Inspection and Testing . . . . . . . . .320

1505.15 Minimum Water Quality Requirements for Reclaimed (Recycled) Water . . . . . . . . . . . . .322

1505.16 Maintenance and Inspection . . . .322

Table 1505.16 Minimum Reclaimed (Recycled) Water Source Testing, Inspection, and Maintenance Frequency . . . . . . .322

1506.0 On-Site Treated Nonpotable Gray Water Systems . . . . . . . . . .322

1506.1 General . . . . . . . . . . . . . . . . . . . . .322

1506.2 Plumbing Plan Submission . . . . . .322

1506.3 System Changes . . . . . . . . . . . . .322

1506.4 Connections to Potable or Recycled Water Supply Systems . . . . . . . . . . . . . . . . . . . .322

1506.5 Water Pressure . . . . . . . . . . . . . . .322

1506.6 Initial Cross-Connection Test . . . .323

1506.7 On-Site Treated Nonpotable Gray Water System Materials . . .323

1506.8 On-Site Treated Nonpotable Gray Water Devices and Systems . . . . . . . . . . . . . . . . . . . .323

1506.9 On-Site Treated Nonpotable Gray Water System Color and Marking Information . . . . . . . . . . .323

1506.10 Design and Installation . . . . . . . . .323

1506.11 Valves . . . . . . . . . . . . . . . . . . . . . .323

1506.12 Signs . . . . . . . . . . . . . . . . . . . . . . .323

1506.13 Inspection and Testing . . . . . . . . .323

CHAPTER 16 NONPOTABLE RAINWATER

CATCHMENT SYSTEMS . . . . . . .325

1601.0 General . . . . . . . . . . . . . . . . . . . . .327

1601.1 Applicability . . . . . . . . . . . . . . . . . .327

1601.2 System Design . . . . . . . . . . . . . . .327

1601.3 Permit . . . . . . . . . . . . . . . . . . . . . .327

1601.4 Component Identification . . . . . . .327

1601.5 Maintenance and Inspection . . . .327

Table 1601.5 Minimum Alternate Water Source Testing, Inspection, and Maintenance Frequency . . . .327

1601.6 Operation and Maintenance Manual . . . . . . . . . . . . . . . . . . . . .328

1601.7 Minimum Water Quality Requirements . . . . . . . . . . . . . . . .328

1601.8 Material Compatibility . . . . . . . . . .328

1601.9 System Controls . . . . . . . . . . . . . .328

1601.10 Separation Requirements . . . . . . .328
CRC § 1501.0 Medium relevance — show source text
1501.0 General . . . . . . . . . . . . . . . . . . . . .309

1501.1 Applicability . . . . . . . . . . . . . . . . . .309

1501.2 System Design . . . . . . . . . . . . . . .309

1501.3 Permit . . . . . . . . . . . . . . . . . . . . . .309

1501.4 Component Identification . . . . . . .309

1501.5 Maintenance and Inspection . . . .309

1501.6 Operation and Maintenance Manual . . . . . . . . . . . . . . . . . . . . .309

1501.7 Minimum Water Quality Requirements . . . . . . . . . . . . . . . .309

Table 1501.5 Recommended Minimum Alternate Water Source Testing, Inspection, and Maintenance Frequency . . . . . . . . . . . . . . . . . . .310

1501.8 Material Compatibility . . . . . . . . . .310

1501.9 Signage . . . . . . . . . . . . . . . . . . . .310

1501.10 System Controls . . . . . . . . . . . . . .310

1502.0 Inspection and Testing . . . . . . . . .310

1502.1 General . . . . . . . . . . . . . . . . . . . . .310

1502.2 Supply System Inspection and Test . . . . . . . . . . . . . . . . . . . .310

1502.3 Cross-Connection

Inspection and Testing . . . . . . . . .310

1502.4 Separation Requirements . . . . . . .311

1502.5 Abandonment . . . . . . . . . . . . . . . .311

1502.6 Sizing . . . . . . . . . . . . . . . . . . . . . .312

1503.0 Gray Water Systems . . . . . . . . . .312

1503.1 General . . . . . . . . . . . . . . . . . . . . .312

1503.2 System Requirements . . . . . . . . .313

1503.3 Connections to Potable and

Reclaimed (Recycled) Water Systems . . . . . . . . . . . . . . . . . . . . .313

1503.4 Location . . . . . . . . . . . . . . . . . . . .313

1503.5 Plot Plan Submission . . . . . . . . . .313

1503.6 Prohibited Location . . . . . . . . . . . .313

Table 1503.4 Location of Gray Water System . . .314

1503.7 Drawings and Specifications . . . .314

1503.8 Procedure for Estimating Gray Water Discharge . . . . . . . . .314

1503.9 Gray Water System Components . . . . . . . . . . . . . . . . .315

1504.0 Subsurface Irrigation System Zones . . . . . . . . . . . . . . . .316

1504.1 General . . . . . . . . . . . . . . . . . . . . .316
CRC § 805.9.1 Medium relevance — show source text
This requirement applies to chilled and hot water systems that are not designed for variable flow, and that have a design capacity greater than or equal to 500 000 Btu/h (147 kW).

E 805.9.1 Test Procedure. The procedure for performing a functional test for supply water temperature reset controls shall be in accordance with Section E

805.9.1.1 and Section E 805.9.1.2.

E 805.9.1.1 Construction Inspection. Prior to functional testing, verify and document the supply water temperature sensors shall be either factory or field calibrated.

E 805.9.1.2 Functional Testing. The functional testing shall be in accordance with the following steps:

Step 1: Change reset control variable to its maximum value. Verify and document the following:

(1) Chilled or hot water temperature setpoint is reset to appropriate value.

(2) Actual supply temperature changes to meet setpoint.

(3) Verify that supply temperature is within 2 percent of the control setpoint.

Step 2: Change reset control variable to its minimum value. Verify and document the following:

(1) Chilled or hot water temperature setpoint is reset to appropriate value.

(2) Actual supply temperature changes to meet setpoint.

(3) Verify that supply temperature is within 2 percent of the control setpoint.

Step 3: Restore reset control variable to automatic control. Verify and document the following:

(1) Chilled or hot water temperature setpoint is reset to appropriate value.

(2) Actual supply temperature changes to meet setpoint.

(3) Verify that supply temperature is within 2 percent of the control setpoint.

E 805.9.2 Acceptance Criteria. The supply water temperature sensors are either factory calibrated (with calibration certificates) or field-calibrated. Sensor performance shall comply with the specifications. The supply water reset is operational.

E 805.10 Hydronic System Variable Flow Controls (Form MECH-10A). The purpose of this test is to ensure that hydronic variable flow chilled water and water-loop heat pump systems with circulating pumps larger than 5 hp (3.7 kW) vary system flow rate by modulating pump speed using a variable frequency drive (VFD) or equivalent. As the loads within the building fluctuate, control valves modulate the amount of water passing through each coil and add or remove the desired amount of energy from the air stream to satisfy the load. In the case of water-loop heat pumps, each two-way control valve associated with a heat pump will be closed where that unit is not operating. As each control valve modulates, the pump variable frequency drive (VFD) responds accordingly to meet system water flow requirements. This is not required on heating hot water systems with variable flow designs or for condensing water serving water cooled chillers. E 805.10.1 Test Procedure. The procedure for performing a functional test for hydronic system variable flow controls shall be in accordance with Section E

805.10.1.1 and Section E 805.10.1.2.

E 805.10.1.1 Construction Inspection. Prior to functional testing, verify and document the pressure sensors are either factory or field calibrated. E 805.10.1.2 Functional Testing. The functional testing shall comply with the following steps:

Step 1: Open control valves to increase water flow to not less than 90 percent design flow. Verify and document the following:
CRC § 904.2 Medium relevance — show source text
(c) The owner or occupant shall promptly correct or repair deficiencies, damaged parts or impairments found while performing the inspection, test and maintenance requirements of this standard. Recalled products shall be replaced or remedied. Such replacement or remedial product shall be installed in accordance with the listing requirements, the manufacturer’s instructions and the appropri- ate NFPA installation standards. A recalled product is a product subject to a statute or administrative regulation specifically requiring the manufacturer, importer, distributor, wholesaler or retailer of a product, or any combination of such entities, to recall the product, or a product voluntarily recalled by a combination of such entities.

[California Code of Regulations, Title 19, Division 1, §904.2(d)] Testing and Maintenance Requirements.

(d) The building or system owner shall ensure immediate correction of any deficiencies noted during the service. A tag or label shall be affixed to a system only after all deficiencies have been corrected. The owner or occupant shall promptly correct or repair deficien- cies, damaged parts or impairments found while performing the inspection, test and maintenance requirements of this standard. Recalled products shall be replaced or remedied. Such replacement or remedial product shall be installed in accordance with the list- ing requirements, the manufacturer’s instructions and the appropriate NFPA installation standards. A recalled product is a product subject to a statute or administrative regulation specifically requiring the manufacturer, importer, distributor, wholesaler or retailer of a product, or any combination of such entities, to recall the product, or a product voluntarily recalled by a combination of such entities.

[California Code of Regulations, Title 19, Division 1, §904.2(e)] Testing and Maintenance Requirements.

(e) At the time of testing and maintenance, or at any time parts are replaced, an itemized invoice showing work performed and parts replaced shall be provided by the licensee to the system owner. If testing and maintenance is performed more than thirty (30) days prior to the next required testing and maintenance date, the invoice shall bear a statement indicating the system was tested and maintained early.

[California Code of Regulations, Title 19, Division 1, §904.2(f)] Testing and Maintenance Requirements.

(f) The licensee shall offer to return all replaced parts to the system owner or owner’s representative, except those parts that are required to be returned to the manufacturer under conditions of warranty.

901.7.1 Impairment coordinator. The building owner shall assign an impairment coordinator to comply with the requirements of this section. In the absence of a specific designee, the owner shall be considered to be the impairment coordinator.

901.7.2 Tag required. A tag shall be used to indicate that a system, or portion thereof, has been removed from service.

901.7.3 Placement of tag. The tag shall be posted at each fire department connection, system control valve, fire alarm control unit, fire alarm annunciator and fire command center, indicating which system, or part thereof, has been removed from service. The fire code official shall specify where the tag is to be placed.

9-10 2025 CALIFORNIA FIRE CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

FIRE PROTECTION AND LIFE SAFETY SYSTEMS
CRC § 1502.4 Medium relevance — show source text
Inspection and Testing . . . . . . . . .310

1502.4 Separation Requirements . . . . . . .311

1502.5 Abandonment . . . . . . . . . . . . . . . .311

1502.6 Sizing . . . . . . . . . . . . . . . . . . . . . .312

1503.0 Gray Water Systems . . . . . . . . . .312

1503.1 General . . . . . . . . . . . . . . . . . . . . .312

1503.2 System Requirements . . . . . . . . .313

1503.3 Connections to Potable and

Reclaimed (Recycled) Water Systems . . . . . . . . . . . . . . . . . . . . .313

1503.4 Location . . . . . . . . . . . . . . . . . . . .313

1503.5 Plot Plan Submission . . . . . . . . . .313

1503.6 Prohibited Location . . . . . . . . . . . .313

Table 1503.4 Location of Gray Water System . . .314

1503.7 Drawings and Specifications . . . .314

1503.8 Procedure for Estimating Gray Water Discharge . . . . . . . . .314

1503.9 Gray Water System Components . . . . . . . . . . . . . . . . .315

1504.0 Subsurface Irrigation System Zones . . . . . . . . . . . . . . . .316

1504.1 General . . . . . . . . . . . . . . . . . . . . .316

1504.2 Required Area of Subsurface Irrigation Fields, Subsoil Irrigation Fields, and Mulch Basins . . . . . . . . . . . . . . . .316

1504.3 Determination of Maximum

Absorption Capacity . . . . . . . . . . .316

Table 1504.2 Design of Six Typical Soils . . . . . .316

1504.4 Groundwater Level . . . . . . . . . . . .316

1504.5 Irrigation, Disposal Field and Mulch Basin Construction . . . . . .316

Table 1504.5.3 Subsoil Irrigation Field Construction . . . . . . . . . . . . . . . . .318

Table 1504.5.5 Subsurface Irrigation Design Criteria for Six Typical Soils . . . . .318

1504.6 Reserved . . . . . . . . . . . . . . . . . . .318

1504.7 Reserved . . . . . . . . . . . . . . . . . . .318

1504.8 Gray Water System Color and Marking Information . . . . . . . .318

1504.9 Other Collection and

Distribution Systems . . . . . . . . . . .318

1504.10 Testing . . . . . . . . . . . . . . . . . . . . .318

1504.11 Maintenance . . . . . . . . . . . . . . . . .318

1505.0 Recycled Water Supply Systems in Buildings . . . . . . . . . .318
CRC § 6.98 Medium relevance — show source text
13|6.98|2.42| |30|15|12:12|5.61|6.10|7.16|8.31|9.54|10.85|2.93| |30|30|< 1:12|1.84|2.01|2.35|2.73|3.13|3.57|1.93| |30|30|5:12|2.56|2.78|3.27|3.79|4.35|4.95|2.75| |30|30|7:12|4.92|5.35|6.28|7.29|8.37|9.52|3.12| |30|30|12:12|8.92|9.71|11.39|13.22|15.17|17.26|4.14| |30|45|< 1:12|1.84|2.01|2.35|2.73|3.13|3.57|2.03| |30|45|5:12|2.56|2.78|3.27|3.79|4.35|4.95|3.26| |30|45|7:12|6.23|6.78|7.96|9.23|10.60|12.06|3.82| |30|45|12:12|12.23|13.31|15.63|18.12|20.80|23.67|5.36| |30|60|< 1:12|1.84|2.01|2.35|2.73|3.13|3.57|2.14| |30|60|5:12|2.56|2.78|3.27|3.79|4.35|4.95|3.78| |30|60|7:12|7.54|8.21|9.64|11.17|12.83|14.60|4.52| |30|60|12:12|15.54|16.92|19.86|23.03|26.44|30.08|6.57| |60|15|< 1:12|3.42|3.72|4.36|5.06|5.81|6.61|3.63| |60|15|5:12|4.75|5.17|6.06|7.03|8.07|9.19|4.40| |60|15|7:12|6.76|7.36|8.64|10.02|11.51|13.09|4.75| |60|15|12:12|10.35|11.27|13.23|15.34|17.61|20.04|5.71| |60|30|< 1:12|3.42|3.72|4.36|5.06|5.81|6.61|3.83| |60|30|5:12|4.75|5.17|6.06|7.03|8.07|9.19|5.37| |60|30|7:12|9.12|9.93|11.66|13.52|15.52|17.66|6.07| |60|30|12:12|16.30|17.75|20.83|24.16|27.73|31.55|8.
California Residential Code Medium relevance — show source text
B. Permanent Service Poles: Anchor guy only as shown in Figure 13 on Page 12. See Figure 5 on Page 10 for the correct placement of guy.

C. The guy strain insulator is to be located in a zone: 8 feet or more above the ground; and 8 feet or more below the level of the lowest supply conductor, or 6 feet or more from the surface of the pole and 1 foot or more below the level of the lowest supply conductor.

Metering Requirements
1. Meters must be furnished by PG&E. See Greenbook sections 5, 6, and 7 for meter panel and additional metering requirements.
2. For residential installations, meter sockets without test bypass facilities must be furnished, installed, and wired by the customer as shown on Page 12.
3. For commercial and industrial applications, meter sockets with PG&E-approved test bypass facilities must be furnished, installed, and wired by the customer.
4. Customer−owned poles for residential use are limited to only one meter panel rated at 225 amps (continuous) or less. Poles for non−residential applications are limited to only one meter panel rated at 200 amps or less. Residential and Non−residential installations with more than one meter, or a meter panel with a greater ampacity must be installed on panelboard construction as shown in Document 065374. Electric meter panels with a circuit breaker section attached to the right or left side of the meter section, may be required, as determined by PG&E, to provide additional support for the panel on the pole.
Verifying Depth of Customer Owned Poles

Applicants who plan to install a new customer−owned service pole prior to inspection by PG&E personnel can use following method for PG&E inspectors to verify the setting depth of newly installed poles that have already been set in the ground. See notes below and Figure 18, “Pole Depth Verification”, on page 17. These installations will be approved at the discretion of the PG&E Electrical inspector.
1. Install 3/4−inch diameter PVC Schedule 40 conduit from the bottom of the pole to 12 inches above grade level.
2. Place a removable cap on the top of the conduit and a permanent cap on the bottom of the conduit.
3. Attach the conduit to the pole using three heavy duty pipe straps and 10D galvanized nails. Place one pipe strap towards the top of the conduit below the removable cap. Place the second strap in the middle of the conduit and the third strap at the bottom of the conduit just above the permanent cap.
4. Install a PG&E approved pole to, at least, the minimum required setting depth. Refer to Table 3 Pole Setting Depths on page 3.
5. Ensure the PVC conduit is not broken and remains free of soil, equipment, or other obstacles, throughout the conduit. The conduit will be used to verify the pole setting depth.
6. Backfill and compact the soil around the pole to 90% of maximum density. Determine the maximum density and the in−place density by the California Test Method No. 216−6, Parts I and II respectively, or by ASTM D−1556 and D−1557 respectively. A copy of the test results may be required by PG&E.
7. Call for inspection after the installation of the customer owned pole is complete.
025055 Page 6 of 17 Rev. #20: 3/25/2022

OH: Services Greenbook Requirements for Customer-Owned Poles EMWP
CRC § 25.4 Medium relevance — show source text
|61|73|85|97|109|121|133|145| |22|3/4|33|44|56|67|78|89|100|111|122|133| |23|3/4|31|41|51|61|72|82|92|102|113|123| |24|3/4|28|38|47|57|66|76|85|95|104|114| |25|3/4|26|35|44|53|61|70|79|88|97|105| |26|3/4|24|33|41|49|57|65|73|82|90|98| |27|3/4|23|30|38|46|53|61|69|76|84|91| |28|3/4|21|28|36|43|50|57|64|71|78|85| |29|3/4|20|27|33|40|47|53|60|67|73|80| |30|3/4|19|25|31|38|44|50|56|63|69|75| |31|3/4|18|24|29|35|41|47|53|59|65|71| |32|3/4|17|22|28|33|39|44|50|56|61|67| |33|3/4|16|21|26|32|37|42|47|53|58|63| |34|3/4|NP|20|25|30|35|40|45|50|55|60| |35|3/4|NP|19|24|28|33|38|42|47|52|57| |36|3/4|NP|18|22|27|31|36|40|45|49|54| |37|3/4|NP|17|21|26|30|34|38|43|47|51| |38|3/4|NP|16|20|24|28|32|36|40|45|49| |39|3/4|NP|15|19|23|27|31|35|39|42|46| |40|3/4|NP|NP|18|22|26|29|33|37|40|44| |For SI: 1 inch = 25.4 mm,
CRC § 25.4 Medium relevance — show source text
1|144|157| |27|3/4|37|49|61|73|86|98|110|122|135|147| |28|3/4|34|46|57|69|80|92|103|114|126|137| |29|3/4|32|43|54|64|75|86|96|107|118|129| |30|3/4|30|40|50|60|70|81|91|101|111|121| |31|3/4|28|38|47|57|66|76|85|95|104|114| |32|3/4|27|36|45|54|63|71|80|89|98|107| |33|3/4|25|34|42|51|59|68|76|84|93|101| |34|3/4|24|32|40|48|56|64|72|80|88|96| |35|3/4|23|30|38|45|53|61|68|76|83|91| |36|3/4|22|29|36|43|50|57|65|72|79|86| |37|3/4|20|27|34|41|48|55|61|68|75|82| |38|3/4|20|26|33|39|46|52|59|65|72|78| |39|3/4|19|25|31|37|43|50|56|62|68|74| |40|3/4|18|24|30|35|41|47|53|59|65|71| |For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1 gallon per minute = 0.963 L/s.
a. Flow rate from Section_ R309.3.4.2.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1 gallon per minute = 0.963 L/s.
a. Flow rate from Section R309.3.4.2._|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1 gallon per minute = 0.963 L/s.
a.
CRC § 2.4. Medium relevance — show source text
Specific SmartMeter module location requirements are detailed in Utility Manual TD-7001M, Electric and Gas Service Requirements (Greenbook), Section 2.4.F.12.

(4) Gas Meter Working Space

(a) Gas meter locations must be 78 inches high and allow for a minimum clear and level working space of 3 feet in front of the meter; width depends on meter size and the number of meters. Grade slope should be less than 2%. See Figure 1 and Figure 2. For a large meter set or multi-meter manifold, this working space extends 12 inches beyond the edge of the Company meter set equipment.

(b) Figure 1 represents a typical gas meter kit with 0 through 350 scfh at 7 inches WC or 0 through 600 scfh at 2 pounds per square inch gauge (psig). Reverse sets are not allowed. The houseline must be to the right of the gas service riser.

(c) Figure 2 represents a typical gas meter kit with 351 through 1400 scfh at 7 inches WC or 601 through 2400 scfh at 2 psig. Do not use reverse sets for 400 through 600 class meters (i.e., 400, 425, and 630). The houseline must be to the right of the gas service riser.

Printed copies of this document might be out of date. The Technical Information Library (TIL) has the current version.

PG&E Internal Information ©2021 Pacific Gas and Electric Company. All rights reserved. Page 3 of 22

3.A. (continued)

Gas Meter Locations J-15

Publication Date: 08/18/2021 Effective Date: 11/01/2021 Rev. 9a

Figure 1. Typical Residential Gas Meter Connection

Printed copies of this document might be out of date. The Technical Information Library (TIL) has the current version.

PG&E Internal Information ©2021 Pacific Gas and Electric Company. All rights reserved. Page 4 of 22

3.A. (continued)

Gas Meter Locations J-15

Publication Date: 08/18/2021 Effective Date: 11/01/2021 Rev. 9a

Figure 2. Typical Gas Meter Connection for 400 to 1000 Class Meter

(5) Meter Set Location Relative to Service Line

The meter set is typically located so that the service line is the minimum possible length, measured in a straight line perpendicular to the main. The Company may consider an alternate route if it results in significantly lower construction costs or facilitates construction.

Printed copies of this document might be out of date. The Technical Information Library (TIL) has the current version.

PG&E Internal Information ©2021 Pacific Gas and Electric Company. All rights reserved. Page 5 of 22

Gas Meter Locations J-15

Publication Date: 08/18/2021 Effective Date: 11/01/2021 Rev. 9a

3.A. (continued)

(6) Meter and Regulator Accessibility

Each meter set must be in a readily accessible location for reading, maintenance, inspection and replacement. It must be protected from corrosion and other damage that may be anticipated including vehicular damage. Large meter sets or multimeter manifolds require adequate space for installation and maintenance and require drive-up access for the Company’s service trucks.

(7) Service Shut-Off Valve Locations
California Residential Code Medium relevance — show source text
19| |29|45|48|19|30|43|19|41|12|19|27|13|20|9|14|19| |30|47|48|20|31|44|19|43|13|20|28|14|21|9|14|20| |31|48|48|21|32|45|20|44|13|21|29|14|22|9|15|21| |32|48|48|21|33|47|21|45|14|21|30|15|23|10|15|21| |33|48|48|22|34|48|21|47|14|22|31|15|23|10|16|22| |34|48|48|23|35|48|22|48|15|23|32|15|24|10|16|23| |35|48|48|23|36|48|23|48|15|23|33|16|25|11|16|23| |36|48|48|24|37|48|23|48|15|24|34|16|25|11|17|24| |37|48|48|25|38|48|24|48|16|25|35|17|26|11|17|25| |38|48|48|25|39|48|25|48|16|25|36|17|27|12|18|25| |39|48|48|26|40|48|25|48|17|26|37|18|27|12|18|26| |40|48|48|27|41|48|26|48|17|27|38|18|28|12|19|27| |41|48|48|27|42|48|26|48|18|27|39|19|29|12|19|27| |42|48|48|28|43|48|27|48|18|28|40|19|30|13|20|28| |43|48|48|29|44|48|28|48|18|29|41|20|30|13|20|29| |44|48|48|29|45|48|28|48|19|29|42|20|31|13|21|29|
CRC § 10-09 Medium relevance — show source text
E. Module must be located at least 2” below plaster or metal grid ceiling.

F. Module, direct mount or remote, is installed above grade level.

G. A remote module must be installed for any gas meter in a basement.

Page 8 of 11 PG&E Internal Information, SL2 © 2013 Pacific Gas & Electric Company. All Rights Reserved. Prepared by: AAJ7

Gas Meter Room J-16

Rev. #03a 10-09-13

Requirements for Customer-Owned Equipment
1. All customer-installed gas equipment must be installed downstream of the service delivery point. The service delivery point is defined as the gas supply point where PG&E’s facilities connect to the customer houseline as follows:
A. For residential and small commercial meter sets, the service delivery point is the point where the male threads of the applicant’s houseline connect to the female threads of PG&E’s gas service tee fitting.

B. Because some commercial and industrial installations do not have service tees installed, the gas supply service delivery point is located at the first weld or fitting after the PG&E-installed bypass valve downstream of the meter.
1. Customer-installed equipment must not connect to utility facilities or obstruct the operation or serviceability of PG&E’s piping, metering, and pressure regulating equipment. Customers are responsible for maintaining all customer facilities downstream of the service delivery point.
2. For multiple gas meter installations where the gas meters are supplied by means of a manifold, any installation of a customer automatic gas shut-off device must be installed downstream of the service delivery point for each meter.
3. Where customers elect to install an automatic shut-off device, all piping, valves, or other piping components must be installed downstream of (i.e., after) the gas supply delivery point.
4. When a combustible gas indicator (CGI) device and controller are installed, the following are required:
A. A gas sensor must be installed no more than 6” from the ceiling of the gas meter room.

B. The design and installation of all such detection devices and systems must be done in accordance with and comply with the NFPA-72, National Fire Alarm Code.

C. The controller must be installed outside of the gas meter room and be located near to the gas meter room door.

D. All wiring and piping of the transmitter to the controller must meet the requirements of NFPA-70, National Electric Code for Class I, Division 1, Group D locations.

E. An audible alarm and flashing strobe light must be included as a part of the controller system. This alarm system must continue to be operational until the condition that has triggered such an alarm has been determined and is manually reset.

F. The controller must have the capability to display readings of the percentage of the LEL readings from inside of the gas meter room.

G. The customer must maintain and calibrate the combustible gas indicator device and all related systems per the manufacturer’s recommendations. An up to date inspection card will be mounted on the wall, just inside the door, signifying the gas detection device has been calibrated and is working accurately.

H. The light switch will continuously and fully engage the fan when turned on.

Access to Meter Room

Applicant must make provisions to allow PG&E access to the gas meter room for emergency response, meter reading, system testing, inspection, and maintenance, in accordance with Gas Rule 16, “Gas Service Extensions.”

Records
1. Retain records per the Record Retention Schedule.

CRC § 1.5 Medium relevance — show source text

Adopting agency	BSC	BSC- CG	SFM	HCD	Col6	Col7	DSA	Col9	Col10	OSHPD	Col12	Col13	Col14	Col15	Col16	BSCC	DPH	AGR	DWR	CEC	CA	SL	SLC
Adopting agency	BSC	BSC- CG	SFM	1	2	1/AC	AC	SS	SS/CC	1	1R	2	3	4	5	5	5	5	5	5	5	5	5
Adopt entire chapter
Adopt entire chapter as amended (amended sections listed below)
Adopt only those sections that are listed below	X		X	X
Chapter / Section
R109.1.5			X	X
R109.1.5.1			X	X
R109.1.5.2				X
R109.1.5.3				X
R109.1.6			X	X
R109.1.6.1				X
R109.1.6.2				X
R109.2 - R109.4			X
R110 - R110.4			X
R111 - R111.3			X
R113.1 - R113.2			X
R114.1 - R114.4			X

The state agency does not adopt sections identified with the following symbol: †

1-2 2025 CALIFORNIA RESIDENTIAL CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

PART I—ADMINISTRATIVE

1 ADMINISTRATION

DIVISION I CALIFORNIA ADMINISTRATION

SECTION 1.1—GENERAL

1.1.1 Title. These regulations shall be known as the California Residential Code, may be cited as such and will be referred to herein as “this code.” The California Residential Code is Part 2.5 of thirteen parts of the official compilation and publication of the adoption, amendment and repeal of building regulations to the California Code of Regulations, Title 24, also referred to as the California Building Standards Code. This part incorporates by adoption the 2024 International Residential Code of the International Code Council with necessary California amendments.

CRC § 1703.6.2 Medium relevance — show source text
1703.6.2 Test and inspection records. Copies of necessary test and special inspection records shall be filed with the building official.

SECTION 1704—SPECIAL INSPECTIONS AND TESTS, CONTRACTOR RESPONSIBILITY AND STRUCTURAL OBSERVATION

1704.1 General. Special inspections and tests, statements of special inspections, responsibilities of contractors, submittals to the building official and structural observations shall meet the applicable requirements of this section.

1704.2 Special inspections and tests. Where application is made to the building official for construction as specified in Section 105, or 1.8.4, as applicable, the owner or the owner’s authorized agent, other than the contractor, shall employ one or more approved agencies to provide special inspections and tests during construction on the types of work specified in Section 1705 and identify the approved agencies to the building official. These special inspections and tests are in addition to the inspections by the building official that are identified in Section 110.

[OSHPD 1R, 2 & 5] In addition, the approved agencies shall provide special inspections and tests during construction on the types of work listed under Chapters 14, 15, 17, 18, 19, 20, 21, 22, 23, 24 and 25, and noted in the Test, Inspection and Observation (TIO) program as required by the Office.

The special inspectors shall act under the direction of the architect or structural engineer or both, and be responsible to the Owner. Where California Administrative Code Section 7-115 (a) 2 permits construction documents to be prepared under the responsible charge of a mechanical, electrical or civil engineer, special inspectors shall be permitted to work under the direction of an engineer in the appro- priate branch as permitted therein.

Exceptions:
1. Special inspections and tests are not required for construction of a minor nature or as warranted by conditions in the jurisdiction as approved by the building official.
2. Unless otherwise required by the building official, special inspections and tests are not required for Group U occupancies that are accessory to a residential occupancy including, but not limited to, those listed in Section 312.1.
3. Special inspections and tests are not required for portions of structures designed and constructed in accordance with the cold-formed steel light-frame construction provisions of Section 2206.1.2 or the conventional light-frame construction provisions of Section 2308. [OSHPD 1R, 2 & 5] Not permitted by OSHPD.
17-4 2025 CALIFORNIA BUILDING CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

SPECIAL INSPECTIONS AND TESTS
1. The contractor is permitted to employ the approved agencies where the contractor is also the owner. [OSHPD 1R, 2 & 5] Not permitted by OSHPD. 5. [HCD 1] The provisions of Health and Safety Code Division 13, Part 6 and the California Code of Regulations, Title 25, Division 1, Chapter 3, commencing with Section 3000, shall apply to the construction and inspection of factory-built housing as defined in Health and Safety Code Section 19971.
CRC § 2-26 Medium relevance — show source text
Figure 2-26 Recessed, Individual Meter Cabinet for Gas and Electric Meter Installations

Notes in reference to Figure 2-26.

18”−36” Max.

4” Min.−6” Max. See Note 4

2” x 6” Wood Insert
1. Meter cabinets are not a preferred method of installation. Meter cabinets, with the exception of Class 250 meter installations, require approval from the local Field Services Manager before construction begins. When approved, they must comply with the requirements in this section.
2. Regulators will be installed on the outside of the cabinet. Additional space is required for larger regulators and dual-head regulators. The local Field Services Manager may approve the regulators to be installed in a cabinet. Regulators installed in a cabinet require the vents to be piped out as described in Gas Design Standard H-93, “Piping–Details: Regulator Vent Lines–Above Ground.”
3. See Subsection 2.5.1., “Service Delivery Point for the Gas Supply,” on Page 2-50. The houseline at the service delivery point also must be reinforced so that it can provide support for the meter set piping. The pipe must be rigid, a minimum of 3/4 inch, and have male National Pipe Thread (NPT) threads.
4. The houseline must extend a minimum of 4 inches and a maximum of 6 inches into the gas meter cabinet measured from the finished wall. The houseline must be 26 inches above the bottom of the
meter cabinet.

° 5. Applicants must provide louvered, non-metallic doors. Each door must open at least 90 .
1. The gas meter cabinet must have a gas-tight seal and be vapor proof from the building. Construction material and sealing requirements for the cabinet are described in Gas Design Standard K-51, located in Appendix C, and also apply to Figure 2-26.
Notes continued on the next page

2022 – 2023 2-44

Section 2, Gas Service

2.4.2. (continued)

Notes in reference to Figure 2-26 (continued).
1. Applicants must ensure that gas meters installed in cabinets comply with the requirements of the inspection authority having jurisdiction.
2. Do not place electric meter panels, equipment or devices, conduit or wiring, enclosures or electrical connections ; water services, faucets, downspouts, or other wet utilities within 36 inches of the gas riser including for services such as cable television or telecommunications.
Requirements for multiple, residential, gas meter cabinets are shown in Figure 2-27, “Cabinet Dimensions for Multiple, Residential Gas Meters,” and include dimensions and details.

Gas meter manifolds may be built in a right-to-left (i.e., reverse) configuration when approved in advance.

Min. Max. 30” 15” 15” 15” Col2 30” Col4 Col5 15” Col7 15” Col9 15”

Max.
2” Max.
2”

Max.
2”

Max.
2”
CRC § 17062.5 Medium relevance — show source text
References – Health and Safety Code Sections 17000 through 17062.5, 17910 through 17995.5, 18200 through 18700, 18860 through 18874, 18938.6, 18941, 18941.5, 19890, 19891, 19892 and 19960 through 19997; Civil Code Sections 1101.4, 1101.5, 1954.201, 1954.202 and 5551; and Government Code Sections 8698.4, 12955.1, 12955.1.1 and 65852.2. California Code of Regulations, Title 20, Sections 1605.1, 1605.3 and 1607.

12 2025 CALIFORNIA PLUMBING CODE

), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

DIVISION I CALIFORNIA ADMINISTRATION

1.9.0 Division of the State Architect.

1.9.1 Division of the State Architect – Access Compliance. Note: Buildings or facilities where accessibility is required for applications listed in California Code of Regulations, Title 24, Part 2 (California Building Code), Chapter 1, Section 1.9.1 regulated by the Division of the State Architect–Access Compliance shall comply with Title 24, Part 2, Chapter 11A or 11B, as applicable under authority cited by CA Govern- ment Code Section 4450 and in reference cited by CA Gov- ernment Code Sections 4450 through 4461, 12955.1(c), and CA Health and Safety Code Sections 18949.1, 19952 through 19959.

1.9.1.1 Adopting Agency Identification. The provisions of this code applicable to buildings identified in this Sub- section 1.9.1 will be identified in the Matrix Adoption Tables under the acronym DSA-AC.

1.9.2 Division of the State Architect – Structural Safety.

1.9.2.1 DSA-SS (Division of the State Architect – Struc- tural Safety).

Application – Public elementary and secondary schools, community college buildings, and state-owned or state- leased essential services buildings.

Enforcing Agency – Division of the State Architect – Structural Safety (DSA-SS).

The Division of the State Architect has been dele- gated the responsibility and authority by the Department of General Services to review and approve the design and oversee and observe the construction of public elemen- tary and secondary schools, community colleges, and state-owned or state-leased essential services buildings.

Authority Cited – Education Code Section 17310 and 81142, and Health and Safety Code Section 16022.

References – Education Code Sections 17280 through 17317 and 81130 through 81147, and Health and Safety Code Sections 16000 through 16023.

1.9.2.1.1 Adopting Agency Identification. The pro- visions of this code applicable to buildings identi- fied in this Subsection 1.9.2.1 will be identified in the Matrix Adoption Tables under the acronym DSA- SS.
CBC § 2022 Medium relevance — show source text
Greenbook

Disconnect Switch Requirements for Distributed Generation Customers

Revision Notes

Revision 07 has the following changes:
1. Revised Note 1 on Page 1 (General Information).
2. Revised Note 2 on Page 1 (General Information).
3. Corrected Figure 3 on Page 6.
Rev. #07: 3/25/2022 060559 Page 7 of 7

UG-1: Services Greenbook

Prepared by: ABB1

This document is also included in the following manuals:
- Electric and Gas Service Requirements (Greenbook)
- Electric Meter Work Practices
Purpose and Scope

This document shows methods acceptable by PG&E, to be used by residential and non-residential (200-amp or less main service switch) customers when converting existing 2-wire or 3-wire overhead services to underground.

General Information
1. A typical overhead service conversion is illustrated in Figure 1 on Page 3. PG&E will install cable in a conduit system provided by the applicant. Various surface mount and semi-flush meter socket installations (illustrated in Figure 2 on Page 3 through Figure 7 on Page 4) are used with services converted to underground. The conversion option selected by the customer shall comply with all local building codes and ordinances. The customer shall furnish, install, own, and maintain termination facilities on or within the building to be served.
2. Local ordinances may include requirements in addition to those shown in this document. Consult local inspection authorities for these requirements. In areas where local ordinances require permits and inspection, these must be obtained before PG&E can establish service. PG&E will install meter(s) after an inspection clearance has been given by the appropriate electrical inspection authority.
3. When a service larger than 200 amps is desired, the customer shall consult with the local PG&E representative.
4. Service Conduit and Termination
A. PG&E will install the underground service cable and make the connections at the service termination point in

’ accordance with PG&E s Electric Rule 16. The underground service lateral conductors will be installed, owned, and maintained by PG&E from PG&E’s distribution system to the termination facility as indicated in Figure 2 through Figure 7 on Pages 3 through 4.

B. The customer shall provide trenching, conduit and backfill on his property in accordance with PG&E

’ specifications and pay any costs required by PG&E s Electric Rule 16.

C. Service conductors will be installed in conduit as shown in Figure 1 on Page 3. For conduit size, refer to PG&E Document 063927 for residential service or Document 063928 for commercial service.

D. The customer shall contact the local PG&E office to discuss service arrangements and agree upon the “Electric Service Location” before trenching or wiring.
CRC § 1-12 Medium relevance — show source text
1.9 Division of the State Architect . . . . . . . . . . . . . . . . . . . . 1-12

1.10 Department of Health Care Access and Information/Office of Statewide Hospital Planning and Development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

1.11 Office of the State Fire Marshal . . . . . . . . . . . . . . . . . . . 1-15

1.12 State Librarian. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

1.13 Department of Water Resources . . . . . . . . . . . . . . . . . . 1-20

1.14 California State Lands Commission . . . . . . . . . . . . . . . 1-20

DIVISION II – SCOPE AND ADMINISTRATION . . . . . . . . . . . . . . . . . 1-21

PART 1—SCOPE AND APPLICATION. . . . . . . . . . . . . . . . . . . . . . . 1-21

101 Scope and General Requirements. . . . . . . . . . . . . . . 1-21

102 Applicability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22

PART 2—ADMINISTRATION AND ENFORCEMENT . . . . . . . . . . . 1-22

103 Code Compliance Agency . . . . . . . . . . . . . . . . . . . . . . 1-22

104 Duties and Powers of Code Official. . . . . . . . . . . . . . 1-22

105 Permits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25

106 Construction Documents . . . . . . . . . . . . . . . . . . . . . . 1-26

107 Temporary Uses, Equipment and Systems. . . . . . . 1-28

108 Fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

109 Inspections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

110 Certificate of Occupancy. . . . . . . . . . . . . . . . . . . . . . . 1-30

111 Service Utilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30

112 Means of Appeals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30
CRC § 90.1 Medium relevance — show source text
In the UEF standard equations, Vr refers to the rated volume in gallons. 2 ASHRAE 90.1 contains a complete specification, including the year version, of the referenced test procedure. 3 Electric instantaneous water heaters with input capacity >40 946 Btu/h (12 kW) and ≤ 200 000 Btu/h (58.6 kW) must comply with the requirements for the 200 000 Btu/h (58.6 kW) if the water heater either: (a) has a storage volume >2 gallons (7.6 L); (b) is designed to provide outlet hot water at temperatures greater than 180°F (82°C); or (c) uses three phase power. 4 Gas storage water heaters with input capacity >75 000 Btu/h (22 kW) and ≤ 105 000 Btu/h (30.8 kW) must comply with the requirements for the >105 000 Btu/h (30.8 kW) if the water heater either: (a) has a storage volume >120 gallons (454 L); (b) is designed to provide outlet hot water at temperatures greater than 180°F (82.2°C); or (c) uses three-phase power 5 Oil storage water heaters with input capacity >105 000 Btu/h (30.8 kW) and ≤ 140 000 Btu/h (41.0 kW) must comply with the requirements for the >140 000 Btu/h (41.0 kW) if the water heater either (a) has a storage volume >120 gallons (454 L); (b) is designed to provide outlet hot water at temperatures greater than 180°F (82.2°C); or (c) uses three-phase power 6 Refer to Section L 503.4.3 for additional requirements for gas storage and instantaneous water heaters and gas hot-water supply boilers. 7 Water heaters or gas pool heaters in this category or subcategory are regulated as consumer products by the USDOE as defined in 10 CFR 430. 8 Where this standard is being applied to a building outside the U.S. and Canada and water heaters in this subcategory are being installed in that building, those water heaters shall meet the local efficiency requirements. If there are no local efficiency standards for residential water heaters, consideration should be given to using the USDOE efficiency requirements shown in Appendix F, Table F-2 of ASHRAE 90.1.

516 2025 CALIFORNIA PLUMBING CODE

), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

CALIFORNIA PLUMBING CODE – MATRIX ADOPTION TABLE

APPENDIX M - PEAK WATER DEMAND CALCULATOR

(Matrix Adoption Tables are non-regulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
CRC § 1-5 Medium relevance — show source text
102 Construction Documents

and Installation Verification . . . . . . . . . . . . . . . . . . . .1-5

103 Building Standards Commission. . . . . . . . . . . . . . . . . . .1-5 104 Department of Housing and Community Development. . . . . . . . . . . . . . . . . .1-6 105 Division of the State Architect . . . . . . . . . . . . . . . . . . . . .1-6

106 Office of Statewide Health Planning and Development . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6

CHAPTER 2 DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

201 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3

202 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3

CHAPTER 3 GREEN BUILDING . . . . . . . . . . . . . . . . . . . . . . . . 3-3

301 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3

302 Mixed Occupancy Buildings . . . . . . . . . . . . . . . . . . . . . . .3-4 303 Phased Projects. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4 304 Voluntary Tiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4 305 CALGreen Tier 1 and CALGreen Tier 2 . . . . . . . . . . . . . .3-4

306 Voluntary Measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-4

CHAPTER 4 RESIDENTIAL MANDATORY MEASURES . . . . . . 4-3

4.1 Planning and Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3 4.2 Energy Efficiency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7 4.3 Water Efficiency and Conservation . . . . . . . . . . . . . . . . .4-9 4.4 Material Conservation and Resource Efficiency . . . . 4-11 4.5 Environmental Quality . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13

CHAPTER 5 NONRESIDENTIAL MANDATORY MEASURES . . 5-3

CRC § 503.4 Medium relevance — show source text

See reference document for detailed information. 3 Et = thermal efficiency. See reference document for detailed information. 4 Maximum capacity—minimum and maximum ratings as provided for and allowed by the unit’s controls. 5 Includes oil-fired (residual). 6 Boilers shall not be equipped with a constant burning pilot light. 7 A boiler not equipped with a tankless domestic water-heating coil shall be equipped with an automatic means for adjusting the temperature of the water such that an incremental change in inferred heat load produces a corresponding incremental change in the temperature of the water supplied. 8 For new construction, refer to Section E 503.4 for additional system compliance requirements. 9 See Informative Appendix F, Table F-4 of ASHRAE 90.1, for U.S. minimum efficiencies for residential products covered by USDOE requirements for U.S. applications.

458 2025 CALIFORNIA MECHANICAL CODE

APPENDIX E

TABLE E 503.7.1(7) PERFORMANCE REQUIREMENTS FOR HEAT REJECTION EQUIPMENT—MINIMUM EFFICIENCY REQUIREMENTS

[ASHRAE 90.1: TABLE 6.8.1-7]

EQUIPMENT TYPE	TOTAL SYSTEM HEAT- REJECTION CAPACITY AT RATED CONDITIONS	SUBCATEGORY OR RATING CONDITION8	PERFORMANCE REQUIRED1,2,3,6,7	TEST PROCEDURE4,5
Propeller or axial fan open- circuit cooling towers	All	95°F entering water 85°F leaving water 75°F entering wb	≥40.2 gpm/hp	CTI ATC-105 and CTI STD-201 RS
Centrifugal fan open-circuit cooling towers	All	95°F entering water 85°F leaving water 75°F entering wb	≥20.0 gpm/hp	CTI ATC-105 and CTI STD-201 RS
Propeller or axial fan closed- circuit cooling towers	All	102°F entering water 90°F leaving water 75°F entering wb	≥16.1 gpm/hp	CTI ATC-105S and CTI STD-201 RS
Centrifugal closed- circuit cooling towers	All	102°F entering water 90°F leaving water 75°F entering wb	≥7.0 gpm/hp	CTI ATC-105S and CTI STD-201 RS
Propeller or axial fan dry coolers (air-cooled fluid cool- ers)	All	115°F entering water 105°F leaving water 95°F entering wb	≥4.5 gpm/hp	CTI ATC-105DS
Propeller or axial fan evapo- rative condensers	All	R-448A test fluid 165°F entering gas temperature 105°F condensing temperature 75°F entering wb	≥160 000 Btu/h·hp	CTI ATC-106
Propeller or axial fan evapo- rative condensers	All	Ammonia test fluid 140°F entering gas temperature 96.

CRC § 82.2 Medium relevance — show source text

(b) is designed to provide outlet hot water at temperatures greater than 180°F (82.2°C); or (c) uses three-phase power 5 Oil storage water heaters with input capacity >105 000 Btu/h (30.8 kW) and ≤ 140 000 Btu/h (41.0 kW) must comply with the requirements for the >140 000 Btu/h (41.0 kW) if the water heater either (a) has a storage volume >120 gallons (454 L); (b) is designed to provide outlet hot water at temperatures greater than 180°F (82.2°C); or (c) uses three-phase power 6 Refer to Section L 503.4.3 for additional requirements for gas storage and instantaneous water heaters and gas hot-water supply boilers. 7 Water heaters or gas pool heaters in this category or subcategory are regulated as consumer products by the USDOE as defined in 10 CFR 430. 8 Where this standard is being applied to a building outside the U.S. and Canada and water heaters in this subcategory are being installed in that building, those water heaters shall meet the local efficiency requirements. If there are no local efficiency standards for residential water heaters, consideration should be given to using the USDOE efficiency requirements shown in Appendix F, Table F-2 of ASHRAE 90.1.

516 2025 CALIFORNIA PLUMBING CODE

CALIFORNIA PLUMBING CODE – MATRIX ADOPTION TABLE

APPENDIX M - PEAK WATER DEMAND CALCULATOR

(Matrix Adoption Tables are non-regulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

Adopting Agency	BSC	BSC- CG	SFM	HCD	Col6	Col7	DSA	Col9	Col10	OSHPD	Col12	Col13	Col14	Col15	Col16	Col17	BSCC	DPH	AGR	DWR	CEC	CA	SL	SLC
Adopting Agency	BSC	BSC- CG	SFM	1	2	1-AC	AC	SS	SS/CC	1	1R	2	3	4	5	6	6	6	6	6	6	6	6	6
Adopt Entire Chapter
Adopt Entire Chapter as amended (amended sections listed below)				X
Adopt only those sections that are listed below
Chapter/Section
M 101.1				X
Table M 102.1				X

CRC § 1220.4.2 Medium relevance — show source text
8|1220.4.2 – 1220.4.6| |1221.7|1221.6| |1308.2 – 1308.4.1|1308.3 – 1308.5.1| |Table 1308.3.1|Table 1308.4.1| |1308.4.2|1308.5.2| |1308.4.2.2 – 1308.6.4|1308.5.2.1 – 1308.7.3| |Table 1308.4.6.2|Table 1308.5.6.2| |1308.6.5 – 1308.13.1|1308.7.7 – 1308.14.1| |1312.1.2 – 1312.1.3|1312.1.1 – 1312.1.2| |Chapter 17|Appendix F| |Chapter 18|Chapter 17| |D 103.2|D 103.1| |E 503.5.6.7|E 503.5.6.6| |E 503.5.7.2 – E 503.5.7.6|E 503.5.7.1 – E 503.5.7.5| |Table E 503.5.7.2|Table E 503.5.7.1| |Table E 503.5.7.6|Table E 503.5.7.5| |Table E 503.5.10.1.2(1)|Table E 503.5.10(1)| |Table E 503.5.10.1.2(2)|Table E 503.5.10(2)| |E 503.5.10.1.2|E 503.5.10| |E 503.5.10.2 – E 503.5.10.2.2|E 503.5.10.1 – E 503.5.10.1.2| |E 503.5.12.1|E 503.5.12| |E 503.5.12.2|E 503.5.12.1| |E 503.6.5.4|E 503.6.5.4.1|

xxii 2025 CALIFORNIA MECHANICAL CODE

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Uniform Mechanical Code Illustrated Training Manual:
CRC § 1305.2.3.3 Medium relevance — show source text
2, 1305.2.3.3, 1305.2.4.1, 1305.2.5, 1305.2.5.1, 1305.2.6, 1305.2.7.1, 1305.2.8, 1305.2.9, 1305.2.9.1, 1305.2.10, 1305.2.10.1, 1305.2.11, 1305.2.11.1, 1305.2.12.1, 1305.2.13, Table 1305.2.15, 1305.2.15.1, 1305.2.16.1, 1305.2.17, 1305.2.17.1, 1305.2.18, 1305.2.18.1, 1305.2.19, Table 1305.2.19, 1305.2.20, 1305.2.20.1, 1307.1.1, 1401.2, 1402.1, 1402.2, 1402.2.1, 1402.3, 1402.4, 1402.5, 1402.6, 1501.5, 1504.1.1, 1504.1.4.1, 1504.1.7, 1509.1, 1509.3, 1510.1

CEC — 25 : California Energy Code

302.2, 702.7, 708.1, 809.1, 907.1, 1104.1

CFC—25: California Fire Code

101.2.2, 101.4.2, 301.3.1, 302.2, 307.1, 308.1, 802.2.1, 802.2.3, 803.2.3, 803.4.1.1, 803.4.1.2, 803.4.1.3, 803.4.1.4, 803.4.1.5, 803.4.1.6, Table 804.5.1.1(1), 904.1.5, 1011.6.1.1, 1303.1.2, 1305.2.8.1, 1305.2.14, 1305.2.14.1, 1401.2, 1501.1, 1501.5, 1502.1, 1502.1.1, 1502.2, 1502.3, 1504.1, 1507.1, 1507.2

CMC—25: California Mechanical Code

302.2, 702.7, 807.1, 902.1.1, 1008.1, 1305.2.7.1, 1305.2.8, 1305.2.8.1

CPC—25: California Plumbing Code

302.2, 408.1, 702.7, 1009.1, 1009.2, 1009.3, 1009.5, 1302.1.6, 1503.1
CRC § 12-72 Medium relevance — show source text
G. Fifty cycles of momentary interruption of the detector power supply at a rate of not more than 6 cycles per minute. 8. Two detectors, employing a maximum sensitivity setting are to be mounted in a position of normal use, energized from a source of supply in accordance with Section 12-72-303 (a), Item 5, and subjected to each of the above test conditions. 9. For tests, C, D and F of Section 12-72-303 (g), Item 5, the time of cycling from one extreme to the other shall be a maximum of 1 hour and a minimum of 5 minutes. For test E the air velocity is to be turned on and off abruptly with a maximum of 1 hour between applications. For test F the time of change from one pressure to the other is approximately one-half minute. The cycling is conducted at a rate not faster than once per 10 seconds. Each cycle is to start at one test condition, changing to the other extreme and returning to the original test condition. 10. The test samples subjected to tests A-G of Section 12-72-303 (g), Item 5, are to be tested for sensitivity, see Sections 12-72303 (f) following the completion of the test. The response of the detectors, when tested in accordance with the sensitivity test, shall not vary more than 50 percent from the value obtained prior to the test.

(h) Deleted.

2025 CALIFORNIA REFERENCED STANDARDS CODE 145

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

PROTECTIVE SIGNALING SYSTEMS

(i) Fire test.
1. At least two of the four detectors subjected to each of the following combustible tests shall operate for alarm when installed on 30-foot (9144 mm) spacings and exposed to the following four types of controlled test fires. The maximum response time shall be 2 minutes for tests A, B and C, and 4 minutes for test D. A. Paper. Combustible is to be [1] / 2 pound of shredded newsprint type paper, strips to be [1] / 4 to [3] / 8 inch (6 mm to 9 mm) wide, 6 to 24 inches (152 mm to 609 mm) long placed in a receptacle formed of [1] / 4 -inch (6 mm) mesh hardware cloth. The receptacle is to be approximately 12 inches (305 mm) in diameter by 24 inches (609 mm) high with a hardware cloth bottom 6 inches (152 mm) above the base. The combustible is to be ignited at the bottom center. Paper is to be dried prior to test. B. Polystyrene. Combustible is to be 2 ounces of typical foam polystyrene type packing material, with no flame inhibitor, each piece [1] / 4 to [3] / 8 inch (6 mm to 9 mm) diameter, 3 to 10 inches (76 mm to 254 mm) long placed in the same type of receptacle as used for test A. Alternate shape of combustible is cylindrical, [ 3] / 4 inch (19 mm) diameter by [1] / 2 inch (13 mm) high having a [3] / 8 -inch (9 mm) diameter hole. The combustible is to be ignited at the bottom center. C. **Gasoline.
CRC § 25.4 Medium relevance — show source text
|74|99|124|149|174|198|223|248|273|298| |30|1|70|93|116|140|163|186|210|233|256|280| |31|1|66|88|110|132|153|175|197|219|241|263| |32|1|62|83|103|124|145|165|186|207|227|248| |33|1|59|78|98|117|137|156|176|195|215|234| |34|1|55|74|92|111|129|148|166|185|203|222| |35|1|53|70|88|105|123|140|158|175|193|210| |36|1|50|66|83|100|116|133|150|166|183|199| |37|1|47|63|79|95|111|126|142|158|174|190| |38|1|45|60|75|90|105|120|135|150|165|181| |39|1|43|57|72|86|100|115|129|143|158|172| |40|1|41|55|68|82|96|109|123|137|150|164| |For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1 gallon per minute = 0.963 L/s.
a. Flow rate from Section_ R309.3.4.2.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1 gallon per minute = 0.963 L/s.
a. Flow rate from Section R309.3.4.2.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1 gallon per minute = 0.963 L/s.
a. Flow rate from Section R309.3.4.2._|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1 gallon per minute = 0.963 L/s.
a.

CRC § 605.1.3.1 Medium relevance — show source text

476 2025 CALIFORNIA MECHANICAL CODE

APPENDIX E

Col1	TABLE E 605.1.3.1 VENTILATION AIR REQUIREMENTS, (cubic foot per minute) [ASHRAE 62.2: TABLE 4-1a]	Col3	Col4	Col5	Col6
FLOOR AREA (ft2)	BEDROOMS	BEDROOMS	BEDROOMS	BEDROOMS	BEDROOMS
FLOOR AREA (ft2)	1	2	3	4	5
<500	30	38	45	53	60
501-1000	45	53	60	68	75
1001-1500	60	68	75	83	90
1501-2000	75	83	90	98	105
2001-2500	90	98	105	113	120
2501-3000	105	113	120	128	135
3001-3500	120	128	135	143	150
3501-4000	135	143	150	158	165
4001-4500	150	158	165	173	180
4501-5000	165	173	180	188	195

For SI units: 1 square foot = 0.0929 m [2], 1 cubic foot per minute = 0.00047 m [3] /s

Exception: Where Qfan, calculated for unbalanced ventilation, is less than or equal to 15 CFM (7 L/s), a dwelling-unit ventilation system is not required.

[ASHRAE 62.2:4.1.2] E 605.1.3.4 Effective Annual Average Infiltra- tion Rate ( Qinf ) Using a Multipoint Envelope Leakage Test. Effective Annual Average Infiltration Rate ( Qinf ) shall be calculated using the normalized leakage calculated from measurements of envelope leakage using a multipoint test from either ASTM E779 in accordance with Section E 605.1.3.4(A) or CGSB 149.10 in accordance with Section E 605.1.3.4(B). E 605.1.3.4(A) ASTM Procedure. To calculate the effective leak area ( ELA ) from ASTM E779, the leakage area for pressurization and depressurization (using a 0.0006 psi [4 Pa] reference pressure) shall be averaged using Equation E 605.1.3.4(A):

[Equation E 605.1.3.4(A)]

ELA = ( Lpress + Ldepress )/ 2

Where:

ELA = effective leakage area, ft [2] (m [2] ) Lpress = leakage area from pressurization, ft [2 ] (m [2] ) Ldepress = leakage area from depressurization, ft [2 ] (m [2] )

For SI units: 1 square foot = 0.0929 m [2]

CRC § 4.6 Medium relevance — show source text

1—REFERENCED STANDARDS	Col2	Col3
STANDARD ACRONYM	STANDARD NAME	SECTIONS HEREIN REFERENCED
ASTM C5—10	Standard Specification for Quicklime for Structural Purposes	BK104.4.6
ASTM C141/C141M—14	Standard Specification for Hydrated Hydraulic Lime for Structural Purposes	BK104.4.6
ASTM C206—14	Standard Specification for Finishing Hydrated Lime	BK104.4.6
ASTM C926—21	Specification for Appliance of Portland Cement-Based Plaster	BK104.4.8
ASTM C1707—11	Standard Specification for Pozzolanic Hydraulic Lime for Structural Purposes	BK104.4.6
ASTM E2392/E2392M—10(2016)	Standard Guide for Design of Earthen Wall Building Systems	BK104.4.3.2
ASTM BS1, ASTM BS EN 459—15	Building Lime—Part 1: Definitions, Specifications and Conformity Criteria; Part 2: Test Methods	BK104.4.6

APPENDIX BK-18 2025 CALIFORNIA RESIDENTIAL CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE APPENDIX BL – HEMP-LIME (HEMPCRETE) CONSTRUCTION

(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

Adopting agency	BSC	BSC- CG	SFM	HCD	Col6	Col7	DSA	Col9	Col10	OSHPD	Col12	Col13	Col14	Col15	Col16	BSCC	DPH	AGR	DWR	CEC	CA	SL	SLC
Adopting agency	BSC	BSC- CG	SFM	1	2	1/AC	AC	SS	SS/CC	1	1R	2	3	4	5	5	5	5	5	5	5	5	5
Adopt entire chapter
Adopt entire chapter as amended (amended sections listed below)			X
Adopt only those sections that are listed below
Chapter / Section
BL 105			X

2025 CALIFORNIA RESIDENTIAL CODE APPENDIX BL-1

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

APPENDIX BL-2 2025 CALIFORNIA RESIDENTIAL CODE

CRC § 609.1 Medium relevance — show source text

SECTION 609—HYPERBARIC FACILITIES

609.1 General. Hyperbaric facilities shall be inspected, tested and maintained in accordance with NFPA 99.

609.2 Records. Records shall be maintained of all testing and repair conducted on the hyperbaric chamber and associated devices and equipment. Records shall be available to the fire code official.

SECTION 610—CLOTHES DRYER EXHAUST SYSTEMS

610.1 Clothes dryer exhaust duct systems. Clothes dryer exhaust duct systems shall be in accordance with Sections 610.1.1 and 610.1.2.

610.1.1 Installation. Clothes dryer exhaust duct systems shall be installed in accordance with the California Mechanical Code or the International Fuel Gas Code, and the manufacturer’s installation instructions.

610.1.2 Maintenance. The lint trap, mechanical and heating components, and the exhaust duct system of a clothes dryer shall be maintained in accordance with the manufacturer’s operating instructions to prevent the accumulation of lint or debris that prevents the exhaust of air and products of combustion.

2025 CALIFORNIA FIRE CODE 6-13

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

6-14 2025 CALIFORNIA FIRE CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

CALIFORNIA FIRE CODE – MATRIX ADOPTION TABLE

CHAPTER 7 – FIRE AND SMOKE PROTECTION FEATURES

(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

Adopting Agency	BSC	BSC- CG	SFM	Col5	HCD	Col7	Col8	DSA	Col10	OSHPD	Col12	Col13	Col14	Col15	Col16	BSCC	DPH	AGR	DWR	CEC	CA	SL	SLC
Adopting Agency	BSC	BSC- CG	T-24	T-19*	1	2	1/AC	AC	SS	1	1R	2	3	4	5	5	5	5	5	5	5	5	5
Adopt Entire Chapter
Adopt Entire Chapter as amended (amended sections listed below)			X
Adopt only those sections that are listed below
[California Code of Regulations, Title 19, Division 1]
Chapter / Section
709			X

CRC § 12.1 Medium relevance — show source text
12.1|||X|||||||||||||||||||||| |1705.12.2|||X|||||||||||||||||||||| |1705.13.1.1|||||||||||X|X|||X|||||||||| |1705.13.1.2|||||||||||X|X|||X|||||||||| |1705.13.2|||X|||||||||||||||||||||| |1705.13.3|||X|||||||||||||||||||||| |1705.14.1.1|||||||||||X|X|||X|||||||||| |1705.14.1.2|||||||||||X|X|||X|||||||||| |1705.14.2|||||||||||X|X|||X|||||||||| |1705.14.3.1|||||||||||X|X|||X|||||||||| |1705.15|||X|||||||||||||||||||||| |1705.16|||X|||||||||||||||||||||| |1705.18|||X||||||||X|X|||X|||||||||| |1705.19_ –_1705.20|||X|||||||||||||||||||||| |1707.1|X|||X|X|||||||||||||||||||| |1710|||||||||||X|X|||X||||||||||

The state agency does not adopt sections identified with the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.

17-2 2025 CALIFORNIA BUILDING CODE

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17 SPECIAL INSPECTIONS AND TESTS

User notes:

About this chapter: Chapter 17 provides a variety of procedures and criteria for testing materials and assemblies, and labeling materials and assemblies. Its key purposes are to establish where additional inspections/observations and testing must be provided, and the submittals and verifications that must be provided to the building official. This chapter expands on the inspections of Chapter 1 by requiring special inspection by a qualified individual where indicated and, in some cases, structural observation by a registered design professional. Quality assurance measures that verify proper assembly of structural components and the suitability of the installed materials are intended to provide a building that, once constructed, complies with the minimum structural and fire-resistance code requirements as well as the approved design. To determine this compliance often requires frequent inspections and testing at specific stages of construction.

ICC code development note: Code change proposals to sections preceded by the designation [BF] will be considered by the IBC—Fire Safety Code Development Committee during the 2024 (Group A) Code Development Cycle. Sections preceded by the designation [F] will be considered by the International Fire Code Development Committee during the 2024 (Group A) Code Development Cycle. All other code change proposals will be considered by the IBC—Structural Code Development Committee during the Group B cycle.

SECTION 1701—GENERAL

1701.1 Scope. The provisions of this chapter shall govern the quality, workmanship and requirements for materials covered. Materials of construction and tests shall conform to the applicable standards listed in this code.

1701.1.1 Application. [OSHPD] The scope of application of Chapter 17 is as follows:
CRC § 1-22 Medium relevance — show source text
PART 2—ADMINISTRATION AND ENFORCEMENT . . . . . . . . . . . 1-22

103 Code Compliance Agency . . . . . . . . . . . . . . . . . . . . . . 1-22

104 Duties and Powers of Code Official. . . . . . . . . . . . . . 1-22

105 Permits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25

106 Construction Documents . . . . . . . . . . . . . . . . . . . . . . 1-26

107 Temporary Uses, Equipment and Systems. . . . . . . 1-28

108 Fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

109 Inspections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

110 Certificate of Occupancy. . . . . . . . . . . . . . . . . . . . . . . 1-30

111 Service Utilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30

112 Means of Appeals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30

113 Violations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31

114 Stop Work Order . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31

115 Unsafe Structures and Equipment . . . . . . . . . . . . . . 1-31

116 Emergency Measures . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32

117 Demolition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32

CHAPTER 2 DEFINITIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3

201 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

202 General Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

CHAPTER 3 PROVISIONS FOR ALL COMPLIANCE

METHODS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3

301 Administration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
CRC § 5.3 Medium relevance — show source text
1703 A .5.3 Label information. The label shall contain the manufacturer’s identification, model number, serial number or definitive information describing the performance characteristics of the product, material or assembly and the approved agency’s identification.

1703 A .5.4 Method of labeling. Information required to be permanently identified on the product, material or assembly shall be acid etched, sand blasted, ceramic fired, laser etched, embossed or of a type that, once applied, cannot be removed without being destroyed.

1703 A .6 Evaluation and follow-up inspection services. Where structural components or other items regulated by this code are not visible for inspection after completion of a prefabricated assembly, the owner or the owner’s authorized agent shall submit a report of each prefabricated assembly. The report shall indicate the complete details of the assembly, including a description of the assembly and its components, the basis upon which the assembly is being evaluated, test results and similar information and other data as necessary for the building official to determine conformance to this code. Such a report shall be approved by the building official.

1703 A .6.1 Follow-up inspection. The owner or the owner’s authorized agent shall provide for special inspections of fabricated items in accordance with Section 1704 A .2.5.

1703 A .6.2 Test and inspection records. Copies of necessary test and special inspection records shall be filed with the building official.

SECTION 1704 A —SPECIAL INSPECTIONS AND TESTS, CONTRACTOR RESPONSIBILITY AND STRUCTURAL OBSERVATION

1704 A .1 General. Special inspections and tests, statements of special inspections, responsibilities of contractors, submittals to the building official and structural observations shall meet the applicable requirements of this section.

1704 A .2 Special inspections and tests. Where application is made to the building official for construction as specified in Section 105 the owner shall employ one or more approved agencies to provide special inspections and tests during construction on the types of work specified in Section 1705 A and identify the approved agencies to the building official. These special inspections and tests are in addition to the inspections by the building official that are identified in Section 110.

[OSHPD 1 & 4] The inspectors shall act under the direction of the architect or structural engineer or both, and be responsible to the Owner. Where the California Administrative Code (CAC) Section 7-115 (a) 2 permits construction documents to be prepared under the

17A-4 2025 CALIFORNIA BUILDING CODE

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SPECIAL INSPECTIONS AND TESTS

responsible charge of a mechanical, electrical or civil engineer, inspectors shall be permitted to work under the direction of engineer in appropriate branch as permitted therein.

Exceptions:
1. Special inspections and tests are not required for construction of a minor nature or as warranted by conditions in the jurisdiction as approved by the building official.
2. [DSA-SS, DSA-SS/CC] Reference to Section 105 and Section 110 shall be to the California Administrative Code instead.
CRC § 8.10 Medium relevance — show source text
1.8.10 Other Building Regulations . . . . . . . . . . . . . . . . . . . . . . 1-13

1.9 Division of the State Architect . . . . . . . . . . . . . . . . . . . . 1-13

1.10 Department of Health Care Access and Information/Office of Statewide Hospital Planning and Development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

1.11 Office of the State Fire Marshal . . . . . . . . . . . . . . . . . . . 1-17

1.12 State Librarian. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22

1.13 Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22

1.14 California State Lands Commission . . . . . . . . . . . . . . . 1-22

DIVISION II – SCOPE AND ADMINISTRATION . . . . . . . . . . . . 1-23

Part 1—Scope and Application. . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23

101 Scope and General Requirements. . . . . . . . . . . . . . . 1-23

102 Applicability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24

Part 2—Administration and Enforcement . . . . . . . . . . . . . . . . . 1-24

103 Code Compliance Agency . . . . . . . . . . . . . . . . . . . . . . 1-24

104 Duties and Powers of Building Official. . . . . . . . . . . 1-25

105 Permits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27

106 Floor and Roof Design Loads . . . . . . . . . . . . . . . . . . . 1-29

107 Construction Documents . . . . . . . . . . . . . . . . . . . . . . 1-29

108 Temporary Structures, Equipment and Systems . . . . . . . . . . . . . . . . . . . . . 1-31

109 Fees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31

110 Inspections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31

111 Certificate of Occupancy. . . . . . . . . . . . . . . . . . . . . . . 1-33
CRC § 1703.5.3 Medium relevance — show source text
1703.5.3 Label information. The label shall contain the manufacturer’s identification, model number, serial number or definitive information describing the performance characteristics of the product, material or assembly and the approved agency’s identification.

1703.5.4 Method of labeling. Information required to be permanently identified on the product, material or assembly shall be acid etched, sand blasted, ceramic fired, laser etched, embossed or of a type that, once applied, cannot be removed without being destroyed.

1703.6 Evaluation and follow-up inspection services. Where structural components or other items regulated by this code are not visible for inspection after completion of a prefabricated assembly, the owner or the owner’s authorized agent shall submit a report of each prefabricated assembly. The report shall indicate the complete details of the assembly, including a description of the assembly and its components, the basis upon which the assembly is being evaluated, test results and similar information and other data as necessary for the building official to determine conformance to this code. Such a report shall be approved by the building official.

1703.6.1 Follow-up inspection. The owner or the owner’s authorized agent shall provide for special inspections of fabricated items in accordance with Section 1704.2.5.

1703.6.2 Test and inspection records. Copies of necessary test and special inspection records shall be filed with the building official.

SECTION 1704—SPECIAL INSPECTIONS AND TESTS, CONTRACTOR RESPONSIBILITY AND STRUCTURAL OBSERVATION

1704.1 General. Special inspections and tests, statements of special inspections, responsibilities of contractors, submittals to the building official and structural observations shall meet the applicable requirements of this section.

1704.2 Special inspections and tests. Where application is made to the building official for construction as specified in Section 105, or 1.8.4, as applicable, the owner or the owner’s authorized agent, other than the contractor, shall employ one or more approved agencies to provide special inspections and tests during construction on the types of work specified in Section 1705 and identify the approved agencies to the building official. These special inspections and tests are in addition to the inspections by the building official that are identified in Section 110.

[OSHPD 1R, 2 & 5] In addition, the approved agencies shall provide special inspections and tests during construction on the types of work listed under Chapters 14, 15, 17, 18, 19, 20, 21, 22, 23, 24 and 25, and noted in the Test, Inspection and Observation (TIO) program as required by the Office.

The special inspectors shall act under the direction of the architect or structural engineer or both, and be responsible to the Owner. Where California Administrative Code Section 7-115 (a) 2 permits construction documents to be prepared under the responsible charge of a mechanical, electrical or civil engineer, special inspectors shall be permitted to work under the direction of an engineer in the appro- priate branch as permitted therein.
CRC § 2.1.3 Medium relevance — show source text
2.1.3|Content|N||||||||| |104.2.1.4|Tests|N||||||||| |104.2.2|Alternative
materials, design and
methods|Y||1.11.2.4
1.11.2.5||||||| |104.2.2.1|Approval authority|N||||||||| |104.2.2.2|Application and
disposition|N||1.11.2.4
1.11.2.5||||||| |104.2.2.3|Compliance with
code intent|N||||||||| |104.2.2.4|Equivalency criteria|N||||||||| |104.2.2.5|Tests|N||||||||| |104.2.2.6|Reports|N||||||||| |104.2.2.6.1|Evaluation reports|N||||||||| |104.2.2.6.2|Other reports|N||||||||| |104.2.2.7|Peer review|N||||||||| |104.2.3|Modifications|N||||||||| |104.3|Applications and
permits|Y||||||||| |104.4|Right of entry|N||||||||| |104.4.1|Warrant|N||||||||| |104.5|Identification|N||||||||| |104.6|Notices and orders|Y||||||||| |104.7|Official records|N||||||||| |104.7.1|Approvals|N||||||||| |104.7.2|Inspections|N||||||||| |104.7.3|Code alternatives
and modifications|N||||||||| |104.7.4|Tests|N||||||||| |104.7.5|Fees|N||||||||| |104.8|Liability|Y||||||||| |104.8.1|Legal defense|Y||||||||| |104.9|Approved materials
and equipment|N||||||||| |104.9.1|Material and
equipment reuse|N||||||||| |104.10|Other agencies|N||||||||| |105|Permits|Y||||||||| |105.1|General|Y||||||||| |105.2|Permits required|Y||||||||| |105.3|Work exempt from
permit|Y||||||||| |105.4|Permit application|Y||||||||| |105.4.1|Preliminary
inspection|N||||||||| |105.4.2|Time limitation of
application|N||||||||| |105.5|Permit approval|N||||||||| |105.6|Permit issuance|N||||||||| |105.6.1|Refusal to issue a
permit|N||||||||| |105.7|Validity of permit|N||||||||| |105.8|Expiration|Y||105.5.1||||||| |105.9|Retention of permits|N|||||||||

APPENDIX H-22 2025 CALIFORNIA WILDLAND-URBAN INTERFACE CODE

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

APPENDIX H—REFERENCED CALIFORNIA DOCUMENTS

|2025 CWUIC—continued|Col2|Adopted
Yes/No|IWUIC
Section|CBC
Section|CFC
Section|Title 14,
Division 1.5
Section|Title 19,
CRC § 4.6 Medium relevance — show source text
Considerations are soil density; clearance from obstacles, utilities, and structures; location of bends, and water service locations. Excavations and shoring shall be in accordance with jurisdictional safety requirements. (c) Set Up Fuse the proper length of polyethylene pipe in accordance with ASTM F2620, or ASTM D3261 and fuse the end to a small length that is attached to the pulling head. A rod pusher cable is pushed through the damaged host pipe and attached to the pulling cable, which is then drawn through the pipe. The clevis end of the cable is attached to the pulling head. The pulling equipment is then set up according to the manufacturer’s instructions.

(d) Pulling Pull the pulling head through. Once the pull is done, complete the connection to the existing piping.

4.6 Cleanouts

4.6.1 Plug Each cleanout fitting for cast-iron pipe shall consist of a cast-iron or brass body and an approved plug. Each cleanout for galvanized wrought-iron, galvanized steel, copper, or brass pipe shall consist of a brass plug as specified in Table 1, or a standard weight brass cap, or an approved ABS or PVC plastic plug, or an approved stainless-steel cleanout or plug. Plugs shall have raised square heads or approved countersunk rectangular slots. 4.6.2 Approved Each cleanout fitting and each cleanout plug, or cap shall be of an approved type.

452 2025 CALIFORNIA PLUMBING CODE

), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

IS 26

4.6.3 Watertight and Gastight

Cleanouts shall be designed to be watertight and gastight.

5 Testing and Inspection Requirements

5.1 Media

The piping of the building sewer shall be tested with water. The Authority Having Jurisdiction shall be permitted to require the removal of cleanouts, etc., to ascertain whether the pressure has reached all parts of the system.

5.2 Water Test

The system shall be tested by plugging the end of the building sewer at its points of connection to the public sewer or private sewage disposal system and completely filling the building sewer with water from the lowest to the highest point thereof.

5.3 Inspections

The completed piping shall be internally inspected by camera unless waived by the Administrative Authority.

TABLE 1

CLEANOUTS (See Section 4.6.1)

NPS SIZE OF CLEANOUT
(inches) THREADS PER INCH

1.5 1.5 11.5

2 1.5 11.5

2.5 2.5 8

3 2.5 8

4 & larger 3.5 8

Note: For SI units: 1 inch = 25 mm

Uniform Plumbing Code References

The following sections of the 2024 Uniform Plumbing Code apply.

105.2 Required Inspections

105.2.2 Other Inspections

105.3 Testing of Systems

301.2 Minimum Standards

309.0 Workmanship

312.0 Protection of Piping, Materials, and Structures
CRC § 309.0 Medium relevance — show source text
2025 CALIFORNIA PLUMBING CODE 469

), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

IS 33

Uniform Plumbing Code References for Ductile Iron and PVC Pressure Building Supply and Exterior Cold-Water Piping

The following sections of the 2024 Uniform Plumbing Code apply to ductile iron and PVC pressure building supply and exterior cold-water piping.

Chapter 3 General Regulations

309.0 Workmanship

312.0 Protection of Piping, Materials, and Struc tures

313.0 Hangers, Supports, and Anchors

314.0 Trenching, Excavation, and Backfill

Chapter 6 Water Supply and Distribution

604.0 Materials (water piping)

Table 604.1 Materials for Building Supply and Water Distribution Piping and Fittings

605.4 Ductile Iron Pipe and Joints

605.12 PVC Plastic Pipe and Joints

605.16.2 Plastic Pipe to Other Materials

609.0 Installation, Testing, Unions, and Location

Abbreviations

IAPMO International Association of Plumbing and Mechanical Officials

UPC Uniform Plumbing Code published by IAPMO

AWWA American Water Works Association

CSA Canadian Standards Association

Applicable Standards.

ASME B16.4 Gray Iron Threaded Fittings Classes 125 and 250

ASTM D1785 Poly (Vinyl Chloride) (PVC) Plastic Pipe, Schedules 40, 80, and 120

ASTM D2241 Poly (Vinyl Chloride) (PVC) Pressure-Rated Pipe (SDR Series)

ASTM D2466 Poly (Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40

ASTM D2467 Poly (Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 80

ASTM F1970 Special Engineered Fittings, Appurtenances or Valves for use in Poly (Vinyl Chloride) (PVC) or Chlorinated Poly (Vinyl Chloride) (CPVC) Systems

AWWA C110 Ductile Iron and Gray-Iron Fittings

AWWA C111 Rubber-Gasket Joints for Ductile-Iron Pressure Pipe and Fittings

AWWA C151 Ductile-Iron Pipe, Centrifugally Cast

AWWA C153 Ductile-Iron Compact Fitting

AWWA C900 Polyvinyl Chloride (PVC) Pressure Pipe and Fabricated Fittings, 4 in. through 12 in. (100 mm through 300 mm)

AWWA C904 Crosslinked Polyethylene (PEX) Pressure Tubing, ½ in. through 3 In. (13 mm through 76 mm), for Water Service

AWWA C907 Injection-Molded Polyvinyl Chloride (PVC) Pressure Fittings, 4 In, through 12 in (100 mm through 300 mm) for Water, Wastewater and Reclaimed Water Service

IAPMO/

ANSI UPC-1 Uniform Plumbing Code

470 2025 CALIFORNIA PLUMBING CODE

), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.
CRC § 4.1 Medium relevance — show source text
- 100°F
  (16°C-38°C)|1 h|6 h|2 h|12 h|6 h|24 h| |40°F-60°F
  (4°C-16°C)|2 h|12 h|4 h|24 h|12 h|48 h| |10°F- 40°F
  (-12°C+4°C)|8 h|48 h|16 h|96 h|48 h|8 days| |*If gaps or loose fits are encountered in the system, double these cure times.|*If gaps or loose fits are encountered in the system, double these cure times.|*If gaps or loose fits are encountered in the system, double these cure times.|*If gaps or loose fits are encountered in the system, double these cure times.|*If gaps or loose fits are encountered in the system, double these cure times.|*If gaps or loose fits are encountered in the system, double these cure times.|*If gaps or loose fits are encountered in the system, double these cure times.|
2025 CALIFORNIA PLUMBING CODE 467

), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

IS 33

FIGURE 1

LOCATION OF THRUST BLOCKS (STANDARD AND METRIC COMBINED) A COMPARISON OF THRUST-BLOCK AREAS (See Section 4.1)

468 2025 CALIFORNIA PLUMBING CODE

), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

IS 33

FIGURE 2

THRUST BLOCK BEARING AREA (See Section 5.2.2)

2025 CALIFORNIA PLUMBING CODE 469

), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

IS 33

Uniform Plumbing Code References for Ductile Iron and PVC Pressure Building Supply and Exterior Cold-Water Piping

The following sections of the 2024 Uniform Plumbing Code apply to ductile iron and PVC pressure building supply and exterior cold-water piping.

Chapter 3 General Regulations

309.0 Workmanship

312.0 Protection of Piping, Materials, and Struc tures

313.0 Hangers, Supports, and Anchors

314.0 Trenching, Excavation, and Backfill

Chapter 6 Water Supply and Distribution

604.0 Materials (water piping)

Table 604.1 Materials for Building Supply and Water Distribution Piping and Fittings

605.4 Ductile Iron Pipe and Joints

605.12 PVC Plastic Pipe and Joints

605.16.2 Plastic Pipe to Other Materials

609.0 Installation, Testing, Unions, and Location

Abbreviations

IAPMO International Association of Plumbing and Mechanical Officials

UPC Uniform Plumbing Code published by IAPMO

AWWA American Water Works Association

CSA Canadian Standards Association

Applicable Standards.

ASME B16.4 Gray Iron Threaded Fittings Classes 125 and 250

ASTM D1785 Poly (Vinyl Chloride) (PVC) Plastic Pipe, Schedules 40, 80, and 120

ASTM D2241 Poly (Vinyl Chloride) (PVC) Pressure-Rated Pipe (SDR Series)
CRC § 304.8 Medium relevance — show source text
|76
71
67
63|88
82
77
73|150
141
133
126|178
167
157
149|306
285
268
254|355
331
311
295|593
555
524
498|686
644
609
579|1170
1090
1030
974|1360
1280
1200
1140|2420
2260
2140
2030|2720
2540
2400
2280| |150
200
250
300|19
17
15
13|27
23
21
19|52
45
40
37|60
52
46
42|104
91
82
75|122
106
95
87|206
178
159
144|240
207
184
168|409
355
319
234|477
415
373
342|793
686
613
559|936
812
728
665|1660
1440
1290
1180|1860
1610
1440
1320|

For SI units: 1 foot = 304.8 mm, 1 cubic foot per hour = 0.0283 m [3] /h, 1 pound-force per square inch = 6.8947 kPa, 1 inch water column = 0.249 kPa
CRC § 601.2 Medium relevance — show source text
2 Exceptions_3 & 4_||X||X|X|||||||||||||||||||| |601.2 Exceptions_4, 5 & 6_||||||||||||||||||||X||||| |601.2 Exception_5_||X||||||||||||||||||||||| |601.2.1||||X||||||||||||||||||||| |601.2.1.1||||X||||||||||||||||||||| |601.2.1.2||||X||||||||||||||||||||| |601.3.2||||X|X|||||||||||||||||||| |601.3.3||X||X||||||||||||||||||||| |601.3.3 Exception||||||||||||||||||||X||||| |601.4||||||||||||||||||||||X||| |601.5|||||||||||||||||||X|||||| |601.6|||||||||||||||||||X|||||| |601.7|||||||||||||||||||X|||||| |601.8|||||||||||||||||||X|||||| |603.5.11||||X|X|||||||||||||||||||| |603.5.14_, Note_|||X|||||X||||||||||||||||| |604.1 Exception||||||||||X||X|X|X|X|||||||||| |Table 604.1 & Notes_3 - 5_|X|||X|X|||X||||||||||X|X|||||| |604.1.1||||X|X|||||||||||||||||||| |604.1.2||||X|X|||X||||||||||||||||| |604.2_Note_|X|||X|X|||||||||||||||||||| |604.13|X|||X|X|||||||||||||||||||| |605.2.2||||X|X|||||||||||||||||||| |605.9|X|||X|X|||X||X|X|X|X|X|X|||X|X|||||| |605.9.1|X|||X|X|||X||X|X|X|X|X|X|||X|X|||||| |605.10|X|||X|X|||X||||||||||||||||| |605.10.1|X|||||||||||||||||||||||| |605.10.1.1|X|||||||||||||||||||||||| |605.12.2||||X|X|||||||||||||||||||| |605.15||||X|X|||X||X|X|X|X|X|X|||||||||| |606.8||||||||||X|X|X|X|X|X|||||||||| |609.
CRC § 31-2022 Medium relevance — show source text
2025 CALIFORNIA PLUMBING CODE 453

), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

454 2025 CALIFORNIA PLUMBING CODE

), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

"The information contained in this appendix is not part of this American National Standard (ANS) and has not been processed in accordance with ANSI's requirements for an ANS. As such, this appendix may contain material that has not been subjected to public review or a consensus process. In addition, it does not contain requirements necessary for conformance to the standard."

The following IAPMO Installation Standard is included here for the convenience of the users of the Uniform Plumbing Code. It is not considered as a part of the Uniform Plumbing Code unless formally adopted as such. This Installation Standard is an independent, stand-alone document published by the International Association of Plumbing and Mechanical Officials and is printed herein by the expressed written permission of IAPMO.

INSTALLATION STANDARD FOR PEX TUBING SYSTEMS

FOR HOT- AND COLD-WATER DISTRIBUTION

IAPMO IS 31-2022

The provisions contained in this appendix are not mandatory unless specifically adopted by a state agency, or referenced in the adopting ordinance.

1 Scope

1.1 General

1.1.1 This Standard specifies requirements for the installation of SDR 9 CTS crosslinked polyethylene (PEX) tubing and fittings, including cold-expansion, crimp, press, and mechanical compression fittings, intended for hot- and cold-water distribution systems within buildings.

1.1.2 This Standards applies to

(a) SDR 9 CTS PEX tubing complying with ASTM F876 and pressure-rated in accordance with PPI TR-3; and (b) PEX fitting systems complying with (i) ASTM F877, for mechanical compression fittings and metal or plastic insert fittings with stainless steel press sleeves; (ii) ASTM F1807 or ASTM F2159, for metal or plastic insert fittings with copper crimp rings; (iii) ASTM F1960, for cold expansion fittings with PEX reinforced rings; or (iv) ASTM F2080, for cold expansion fittings with metal compression sleeves. 1.2 Terminology

In this Standard,

(a) “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy to comply with the Standard; (b) “should” is used to express a recommendation, but not a requirement; (c) “may” is used to express an option or something permissible within the scope of the Standard; and (d) “can” is used to express a possibility or a capability. Notes accompanying sections of the Standard do not specify requirements or alternative requirements; their purpose is to separate explanatory or informa

tive material from the text. Notes to tables and figures are considered part of the table or figure and can be written as requirements.

1.3 Units of Measurement

SI units are the primary units of record in global commerce. In this Standard, the inch/pound units are shown in parentheses. The values stated in each measurement system are equivalent in application, but each unit system is to be used independently. All references to gallons are to U.S. gallons.

2 Reference Publications
CRC § 9.3 Medium relevance — show source text
9.3**|SDR 11|SDR 11|SDR 10|SDR 11|SDR 11|SDR 11|SDR 11| |ACTUAL ID:|0.660|0.860|1.077|1.328|1.554|1.943|2.864|3.682| |LENGTH (feet)
|CAPACITY IN THOUSANDS OF BTU PER HOUR

|CAPACITY IN THOUSANDS OF BTU PER HOUR

|CAPACITY IN THOUSANDS OF BTU PER HOUR

|CAPACITY IN THOUSANDS OF BTU PER HOUR

|CAPACITY IN THOUSANDS OF BTU PER HOUR

|CAPACITY IN THOUSANDS OF BTU PER HOUR

|CAPACITY IN THOUSANDS OF BTU PER HOUR

|CAPACITY IN THOUSANDS OF BTU PER HOUR

| |10
|340
|680
|1230
|2130
|3210
|5770
|16 000
|30 900
| |20
|233
|468
|844
|1460
|2210
|3970
|11 000
|21 200
| |30
|187
|375
|677
|1170
|1770
|3180
|8810
|17 000
| |40
|160
|321
|580
|1000
|1520
|2730
|7540
|14 600
| |50
|142
|285
|514
|890
|1340
|2420
|6680
|12 900
| |60
|129
|258
|466
|807
|1220
|2190
|6050
|11 700
| |70
|119
|237
|428
|742
|1120
|2010
|5570
|10 800
| |80
|110
|221
|398
|690
|1040
|1870
|5180
|10 000
| |90
|103
|207
|374
|648
|978
|1760
|4860
|9400
| |100
|98
|196
|353
|612
|924
|1660
|4590
|8900<
CRC § 1323.13.3 Medium relevance — show source text
2, 1323.13.3| |1326.4 - 1326.10|1326.5 - 1326.11| |1505.6 - 1505.14|1505.5 - 1505.13| |Figure 1505.10|Figure 1505.9| |1506.6 - 1506.13|1506.5 - 1506.12| |1603.3 - 1603.4|1603.4 - 1603.5| |Table 1603.4|Table 1603.5| |1603.5 - 1603.19|1603.6 - 1603.20| |1603.20|1503.2.4| |L 402.9 - L 402.11|L 402.8 - L 402.10| |L 404.9 - L 404.12|L 404.8 - L 404.11| |L 411.5, L 411.6|L 411.2, L411.3| |L 411.7|L 411.4| |L 411.9 - L 411.12|L 411.5 - L 411.8|

xxii 2025 CALIFORNIA PLUMBING CODE

), Copyright © 2025 IAPMO, and may not be used for any other purpose or distributed to any other persons or parties.

RELATED PUBLICATIONS AND SERVICES

The Documents Listed are Not by this Reference Adopted by The State of California.

IAPMO provides a variety of other products which are useful for inspectors, building officials, architects, engineers,

manufacturers, contractors, plumbers, and apprentices.

IAPMO Headquarters Directory

4755 East Philadelphia Street, Ontario, California 91761-2816

Publication Order Desk Phone: 800-85-IAPMO

Publication Toll Free Fax: 877-85-CODES

E-mail: iapmo@iapmo.org

Website: www.iapmo.org

Free Code Question: 800-201-0335

Uniform Plumbing Code – 2024 Edition:

The Uniform Plumbing Code is the most widely adopted plumbing code in the world. The 2024 edition contains complete “turnkey” requirements for the installation and maintenance of plumbing systems, all in one easy to use book.

Uniform Plumbing Code Illustrated Training Manual:

The UPC Illustrated Training Manual is an excellent reference for anyone involved in the plumbing industry. It contains an extensive definitions section and several hundred comprehensive technical diagrams and illustrations. It serves as a textbook, and it also is useful as a valuable tool for explaining the intent and use of the Code.

Uniform Plumbing Code Study Guide:

This book is the perfect complement to the UPC Illustrated Training Manual. Alone, it constitutes a complete self-study course for learning the UPC. It has hundreds of questions, general practice exams, and plumbing math, pipe sizing exercises and fitting identification. A big help in getting you ready for a certification exam!

Guide to Important Code Questions to the Uniform Plumbing Code:

An excellent reference for learning and understanding plumbing code changes and identifies code changes between editions. It is a useful tool for preparing code change proposals.

Uniform Mechanical Code – 2024 Edition:

The Uniform Mechanical Code contains complete requirements for the installation and maintenance of heating, ventilating, cooking and refrigeration systems.

Uniform Mechanical Code Illustrated Training Manual:

Contains technical diagrams and illustrations that demonstrate the intent and use of the UMC. A great reference for everyone involved in Mechanical HVACR design and installation.

Uniform Mechanical Code Study Guide:
CRC § 7.47 Medium relevance — show source text
15|7.47|7.72|8.10|8.37|8.58| |45|75|30|7.05|7.35|7.58|7.93|8.18|8.36| |44|75|31|6.95|7.23|7.45|7.77|8.00|8.16| |43|75|32|6.85|7.13|7.33|7.63|7.83|7.98| |42|75|33|6.75|7.03|7.22|7.49|7.68|7.82| |41|75|34|6.65|6.93|7.12|7.37|7.55|7.67| |46|80|34|6.65|6.93|7.12|7.37|7.55|7.67| |40|75|35|6.55|6.83|7.01|7.26|7.42|7.54| |45|80|35|6.55|6.83|7.01|7.26|7.42|7.54| |44|80|36|6.44|6.73|6.92|7.15|7.30|7.41| |43|80|37|6.32|6.63|6.82|7.05|7.19|7.30| |42|80|38|6.20|6.53|6.72|6.95|7.09|7.19| |41|80|39|6.06|6.42|6.62|6.85|6.99|7.08| |46|85|39|6.06|6.42|6.62|6.85|6.99|7.08| |40|80|40|5.91|6.30|6.52|6.76|6.89|6.98| |45|85|40|5.91|6.30|6.52|6.76|6.89|6.98| |44|85|41|5.75|6.17|6.403|6.66|6.79|6.89| |43|85|42|5.57|6.03|6.28|6.55|6.70|6.79| |42|85|43|5.37|5.88|6.16|6.44|6.59|6.69| |41|85|44|5.15|5.71|6.01|6.33|6.49|6.59| |40|85|45|4.91|5.53|5.86|6.20|6.37|6.48| |Condenser DT2|Condenser DT2|Condenser DT2|14.04|11.23|9.36|7.02|5.62|4.68| |1. LIFT = Entering Condenser Water Temperature (°F) – Leaving Chilled Water Temperature (°F)
2.
CRC § 6.44 Medium relevance — show source text
17|6.44|6.66|6.99|7.23|7.40| |45|75|30|6.08|6.34|6.54|6.84|7.06|7.22| |44|75|31|6.00|6.24|6.43|6.71|6.90|7.05| |43|75|32|5.91|6.15|6.33|6.58|6.76|6.89| |42|75|33|5.83|6.07|6.23|6.47|6.63|6.75| |41|75|34|5.74|5.98|6.14|6.36|6.51|6.62| |46|80|34|5.74|5.98|6.14|6.36|6.51|6.62| |40|75|35|5.65|5.90|6.05|6.26|6.40|6.51| |45|80|35|5.65|5.90|6.05|6.26|6.40|6.51| |44|80|36|5.56|5.81|5.97|6.17|6.30|6.40| |43|80|37|5.46|5.73|5.89|6.08|6.21|6.30| |42|80|38|5.35|5.64|5.80|6.00|6.12|6.20| |41|80|39|5.23|5.54|5.71|5.91|6.03|6.11| |46|85|39|5.23|5.54|5.71|5.91|6.03|6.11| |40|80|40|5.10|5.44|5.62|5.83|5.95|6.03| |45|85|40|5.10|5.44|5.62|5.83|5.95|6.03| |44|85|41|4.96|5.33|5.55|5.74|5.86|5.94| |43|85|42|4.81|5.21|5.42|5.66|5.78|5.86| |42|85|43|4.63|5.08|5.31|5.56|5.69|5.77| |41|85|44|4.45|4.93|5.19|5.46|5.60|5.69| |40|85|45|4.24|4.77|5.06|5.35|5.50|5.59| |Condenser DT2|Condenser DT2|Condenser DT2|14.04|11.23|9.36|7.02|5.62|4.68| |1. LIFT = Entering Condenser Water Temperature (°F) – Leaving Chilled Water Temperature (°F)
2.

NPS	SIZE OF CLEANOUT (inches)	THREADS PER INCH
1.5	1.5	11.5
2	1.5	11.5
2.5	2.5	8
3	2.5	8
4 & larger	3.5	8

Frequently asked questions

What if we have no alternate water source — do we still need the cross‑connection test?

Yes — the cross‑connection procedure still governs initial commissioning: where an alternate system is not present, the code allows a temporary potable connection for performing the test or omits the alternate leg, but the AHJ must witness the required potable pressurization and verify no cross‑connection. See Chapter 1502.3.2.

Is 50 ppm chlorine always required after piping work?

The 50 ppm for 24 hours chlorination step appears in the recycled/alternate water commissioning excerpts for potable system recharging; whether it applies to all potable piping work depends on the system and AHJ (the code excerpt prescribes it for potable systems after dual‑system testing in recycled water contexts). Confirm with AHJ; see CPC recycled water commissioning text.

Who inspects submeters and who keeps test records?

Submeter approvals and testing are subject to state testing rules referenced by § 601.2.1. The installer/owner must provide test records and submittals to the AHJ; submeters must be approved per Business & Professions Code and the cited Title 4 regs.

How long must I keep water test and bacteriology records?

The CPC excerpts require records be available for inspection and imply retention as required by the AHJ or referenced regulations (e.g., operation/maintenance logs for potable rainwater). For specific retention durations check the AHJ and the referenced Title 22/other state regs.

My inspector asked for a “cross‑connection visual checklist” — what should it include?

At minimum: meter locations, valve lock seals intact, equipment room signage, pump and equipment verification, visible cross‑connections, and confirmation that temporary connections (if any) were removed after testing. Those items are in the visual inspection requirements in Chapter 1502.3.1.

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Related in the CRC

Minimum potable water supply to fixtures

Backflow prevention and cross-connection control

Water Supply & Backflow

California Residential Code

Min. Max. 30” 15” 15” 15”	Col2	30”	Col4	Col5	15”	Col7	15”	Col9	15”
Max. 2”	Max. 2”
Max. 2”
Max. 2”

Water system testing & meter/inspection requirements

What the code requires — plain English (controlling §)

Requirements in detail

Scope — what systems are covered

Test types and minimum actions (decision‑relevant)

Who must be present / who does the testing

Exceptions & special cases

Common mistakes (what inspectors see most)

Worked example — new 4‑unit rental building (concrete steps)

Related provisions (quick list)

Code references

1 ADMINISTRATION

17 SPECIAL INSPECTIONS AND TESTS

Frequently asked questions

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