Which installations are excluded from the chapter (what is not covered)?

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

• CPC § 4-2 High relevance — show source text

  ** For a building or space with mixed occupancies, use appropriate occupancy group for each area (for example, a school may have an “A” occupancy for the gymnasium, a “B” occupancy for the office, an “E” occupancy for the classrooms, etc.). Accessory areas such as, but not limited to, hallways/corri- dors, stairways, ramps, toilet rooms, mechanical rooms, closets and fixed equipment, may be excluded.

  2025 CALIFORNIA PLUMBING CODE 75

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

  PLUMBING FIXTURES AND FIXTURE FITTINGS

  TABLE 4-2

  [OSHPD 1, 2, 3, 4 & 5] [24] MINIMUM PLUMBING FACILITIES

  SPACE	HANDWASHING FIXTURE	SCRUB SINKS3	TOILETS	BATHTUBS OR SHOWERS	SERVICE SINKS1	CLINIC SINKS
  Administration Lobby
  Public Toilet - Male	12		1
  Public Toilet - Female	12		1
  Airborne infection isolation room	120
  Airborne infection isolation treatment/exam room	120
  Airborne infection isolation anteroom	1
  Airborne infection isolation toilet room	12		15	15
  Cardiac Catheterization procedure room		14, 33
  Central Sterile Supply	115
  Cesarean/Delivery Service Space
  Labor Rooms	133		19	19
  Recovery Room	133					1
  Drug distribution station	1
  Cesarean operating room		210, 33
  Delivery room		_110,

• CPC § 1004.6 High relevance — show source text

  museum, exhibit (standing space)|30| |Assembly – with fixed seats_|See CBC 1004.6
  Use 50% of the fixed
  seating value| |Business_ (office, sales/soliciting, administration, food processing, courtroom, ambulatory clinic)|150
  See CBC 1004.8| |Dormitory|50| |Day care|35| |Education (classroom)
  Through 12th grade|30| |Education (classroom)
  Beyond 12th grade|50| |Exercise (fitness)|50| |Industrial (fabrication, foundry, workshop, component assembly, repair)|500| |Kitchen/food prep (commercial)|50| |Laboratory
  Educational|50| |Laboratory
  Non-educational|100| |Library|50| |Mercantile (wholesale, retail)|100| |Mall building (covered/open)|See CBC 402.8.2| |Residential (long term: central toilet facilities)_|200| |Warehouse
  Storage portions|4000| |Warehouse
  Distribution portions (selecting, processing, packing, receiving, shipping)|500|

  • Any uses not specifically listed shall be based on similar uses listed in this table.

  ** For a building or space with mixed occupancies, use appropriate occupancy group for each area (for example, a school may have an “A” occupancy for the gymnasium, a “B” occupancy for the office, an “E” occupancy for the classrooms, etc.). Accessory areas such as, but not limited to, hallways/corri- dors, stairways, ramps, toilet rooms, mechanical rooms, closets and fixed equipment, may be excluded.

  2025 CALIFORNIA PLUMBING CODE 75

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

  PLUMBING FIXTURES AND FIXTURE FITTINGS

  TABLE 4-2

  [OSHPD 1, 2, 3, 4 & 5] [24] MINIMUM PLUMBING FACILITIES

  SPACE	HANDWASHING FIXTURE	SCRUB SINKS3	TOILETS	BATHTUBS OR SHOWERS	SERVICE SINKS1	CLINIC SINKS
  Administration Lobby
  Public Toilet - Male	12		1
  Public Toilet - Female	12		1
  Airborne infection isolation room	120
  Airborne infection isolation treatment/exam room	120
  Airborne infection isolation anteroom	1
  Airborne infection isolation toilet room	12		15	15
  Cardiac Catheterization procedure room		_14,

• CPC § 1.1.1.2 High relevance — show source text

  (1) Portable LP-Gas appliances and equipment of all types that are not connected to a fixed fuel piping system.

  (2) Installation of appliances such as brooders, dehydrators, dryers, and irrigation equipment used for agricultural

  purposes.

  (3) Raw material (feedstock) applications except for piping to special atmosphere generators.

  (4) Oxygen-fuel gas cutting and welding systems.

  (5) Industrial gas applications using such gases as acetylene and acetylenic compounds, hydrogen, ammonia, carbon monoxide, oxygen, and nitrogen.

  (6) Petroleum refineries, pipeline compressor or pumping stations, loading terminals, compounding plants, refinery tank farms, and natural gas processing plants.

  (7) Large integrated chemical plants or portions of such plants where flammable or combustible liquids or gases are produced by chemical reactions or used in chemical reactions.

  (8) LP-Gas installations at utility gas plants.

  (9) Liquefied natural gas (LNG) installations.

  (10)Fuel gas piping in electric utility power plants.

  (11)Proprietary items of equipment, apparatus, or instruments such as gas-generating sets, compressors, and calorimeters.

  (12)LP-Gas equipment for vaporization, gas mixing, and gas manufacturing.

  (13)LP-Gas piping for buildings under construction or renovations that is not to become part of the permanent building piping system—that is, temporary fixed piping for building heat.

  (14)Installation of LP-Gas systems for railroad switch heating.

  (15)Installation of LP-Gas and compressed natural gas (CNG) systems on vehicles.

  (16)Gas piping, meters, gas pressure regulators, and other appurtenances used by the serving gas supplier in distribution of gas, other than undiluted LP-Gas.

  (17)Building design and construction, except as specified herein.

  (18)Fuel gas systems on recreational vehicles manufactured in accordance with NFPA 1192.

  (19)Fuel gas systems using hydrogen as a fuel.

  (20)Construction of appliances. {NFPA 54:1.1.1.2}

  1203.0 Inspection.

  1203.1 Inspection Notification. Upon completion of the installation, alteration, or repair of gas piping, and prior to the use thereof, the Authority Having Jurisdiction shall be notified that such gas piping is ready for inspection.

  1203.2 Excavation. Excavations required for the installation of underground piping shall be kept open until the piping has been inspected and approved. Where such piping is covered or concealed before such approval, it shall be exposed upon the direction of the Authority Having Jurisdiction.

  1203.3 Type of Inspections. The Authority Having Jurisdiction shall make the following inspections and either shall approve that portion of the work as completed or shall notify the permit holder wherein the same fails to be in accordance with this code.

  1203.3.1 Rough Piping Inspection. This inspection shall be made after gas piping authorized by the permit has been installed and before such piping has been covered or concealed or fixture or appliance has been attached thereto. This inspection shall include a determination that the gas piping size, material, and installation meet the requirements of this code.

  1203.3.2 Final Piping Inspection. This inspection shall be made after piping authorized by the permit has been installed, and after portions, thereof that are to be covered or concealed are so concealed, and before fixture, appliance, or shutoff valve has been attached thereto.

  2025 CALIFORNIA PLUMBING CODE 215

• CPC § 304.8 High relevance — show source text

  Exception: Area of the building footprint is excluded from the calculation.

  A5.304.8 Graywater irrigation system. Install a graywater collection system for onsite subsurface irrigation using graywater collected from bathtubs, showers, bathroom wash basins and laundry water. See California Plumbing Code.

  SECTION A5.305—WATER REUSE

  A5.305.1 Nonpotable water systems. Nonpotable water systems for indoor and outdoor use shall comply with the current edition of the California Plumbing Code.

  A5.305.2 Irrigation systems. Irrigation systems regulated by a local water efficient landscape ordinance or by the California Department of Water Resources Model Water Efficient Landscape Ordinance (MWELO) shall use recycled water.

  2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A5-21

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  APPENDIX A5-22 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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  CALIFORNIA GREEN BUILDING STANDARDS CODE – MATRIX ADOPTION TABLE

  APPENDIX A5 – NONRESIDENTIAL VOLUNTARY MEASURES

  DIVISION A5.4 – MATERIAL CONSERVATION AND RESOURCE EFFICIENCY

  (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	OSHPD	Col11	Col12	Col13	Col14	Col15	BSCC	DPH	AGR	DWR	CEC	CA	SL	SLC
  Adopting agency	BSC	BSC- CG	SFM	1	2	1/AC	AC	SS	1	1R	2	3	4	5	5	5	5	5	5	5	5	5
  Adopt entire CA chapter		X
  Adopt entire chapter as amended (amended sections listed below)
  Adopt only those sections that are listed below
  Chapter/Section

  2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A5-23

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  APPENDIX A5-24 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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

  A5 NONRESIDENTIAL VOLUNTARY MEASURES

  DIVISION A5.4 – MATERIAL CONSERVATION AND RESOURCE EFFICIENCY

  SECTION A5.401—GENERAL

• California Plumbing Code High relevance — show source text

  1 Color must be black with at least 3 red longitudinal strips. 2 May be used to connect PE conduit to PVC conduit (except in directional drilling apps.) 3 Mechanical couplings are not designed for directional drilling. Fusion joints are required. 4 No reel. 5 With reel.

  Table 11 PVC (Bore-Gard) Directional Boring Conduit

  Size (inches)	Description	Material Code
  3	Conduit 10’, Schedule 40	360055
  3	Conduit 20’, Schedule 40	360056
  4	Conduit 10’, Schedule 40	360026
  4	Conduit 20’, Schedule 40	360025
  4	Replacement Locking Straps1	360031
  4	Replacement Seal Gaskets1	360029
  6	Conduit 10’, Schedule 40	360027
  6	Conduit 20’, Schedule 40	360028
  6	Replacement Locking Straps1	360032
  6	Replacement Seal Gaskets1	360030

  1 Package of 10.

  Rev. #20: 03−25−22 062288 Page 7 of 20

  UG-1: Conduits Greenbook Underground Conduits

  PVC Conduit and Fittings (continued)

  Hole for Attaching

  Rigid Cap Cap Plug

  Table 12 Material Codes for Rigid Conduit Caps and

  Cap Plugs	Col2	Col3
  Conduit Size (inches)	Material Codes	Material Codes
  Conduit Size (inches)	Rigid Cap	Cap Plug
  2	360425	360440
  3	360426	360441
  4	360428	360443
  5	360429	360444
  6	360488	360494

  Table 13 Material Codes for End Bells

  Conduit Size (inches)	Material Code
  2	360420
  3	360421
  4	360423
  5	360424
  6	360487

  Table 14 Material Codes for Cable Protectors [1]

  Conduit Size (inches)	Material Code
  2	382034
  3	382045
  4	4
  5	5
  6	6

  1 Not for new installations; for replacement only.

  Figure 13 Plastic Conduit Cap

  Figure 14 End Bell

  Figure 15 Cable Protector

  1

  Figure 12 Rigid Cap

  Table 15 Material Codes for Snap-N-Stack Combo Spacers [1]

• CPC § 303.4 High relevance — show source text

  APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES

  A5.303.4 Water conserving plumbing fixtures and fittings.

  A5.303.4.1 Nonwater urinals. Nonwater urinals with drain cleansing action are installed in accordance with the California Plumbing Code .

  Where approved, nonwater urinals with drain cleansing action (formerly urinal, hybrids) as defined in Chapter 2, shall be considered waterless urinals.

  A5.303.5 Dual plumbing. New buildings and facilities shall be dual plumbed for potable and recycled water systems for toilet flushing when recycled water is available as determined by the enforcement authority.

  SECTION A5.304—OUTDOOR WATER USE

  A5.304.1 Reserved.

  A5.304.2 Outdoor water use. For new water service not subject to the provisions of Water Code Section 535, separate meters or submeters shall be installed for indoor and outdoor potable water use for landscaped areas of at least 500 square feet but not more than 1,000 square feet.

  A5.304.6 Restoration of areas disturbed by construction. Restore all landscape areas disturbed during construction by planting with local adaptive and/or noninvasive vegetation.

  A5.304.7 Previously developed sites. On previously developed or graded sites, restore or protect at least 50 percent of the site area with adaptive and/or noninvasive vegetation. Projects complying with Section A5.106.3, Item 3 may apply vegetated roof surface to this calculation if the roof plants meet the definition of adaptive and noninvasive.

  Exception: Area of the building footprint is excluded from the calculation.

  A5.304.8 Graywater irrigation system. Install a graywater collection system for onsite subsurface irrigation using graywater collected from bathtubs, showers, bathroom wash basins and laundry water. See California Plumbing Code.

  SECTION A5.305—WATER REUSE

  A5.305.1 Nonpotable water systems. Nonpotable water systems for indoor and outdoor use shall comply with the current edition of the California Plumbing Code.

  A5.305.2 Irrigation systems. Irrigation systems regulated by a local water efficient landscape ordinance or by the California Department of Water Resources Model Water Efficient Landscape Ordinance (MWELO) shall use recycled water.

  2025 CALIFORNIA GREEN BUILDING STANDARDS CODE APPENDIX A5-21

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

  APPENDIX A5-22 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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

  CALIFORNIA GREEN BUILDING STANDARDS CODE – MATRIX ADOPTION TABLE

  APPENDIX A5 – NONRESIDENTIAL VOLUNTARY MEASURES

  DIVISION A5.4 – MATERIAL CONSERVATION AND RESOURCE EFFICIENCY

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

• CPC § 90.1 High relevance — show source text

  [ASHRAE 90.1:7.5.2] L 503.4.3 Large Service Water-Heating Systems. New buildings with service water-heating systems with a total installed input capacity of 1 000 000 Btu/h (293 kW) or greater, provided by high-capacity gas-fired service water-heating equipment shall meet either or both of the following requirements:

  (1) Where a single unit of high-capacity gas-fired service water-heating equipment is installed, it shall have a minimum thermal efficiency ( Et ) of 92 percent. (2) Multiple units of high-capacity gas-fired service water-heating equipment connected to the same service water-heating system shall have a total input-capacity-weighted average thermal efficiency ( Et ) of at least 90 percent, and a minimum of 30 percent of the input of the high-capacity gas-fired service water-heating equipment in the service water heating-system shall have a thermal efficiency ( Et ) of at least 92 percent.

  High-capacity gas-fired service water-heating equipment comprises gas-fired instantaneous water heaters with a rated input both greater than 200 000 Btu/h (58.6 kW) and not less than 4000 British thermal units per hour per gallon [Btu/(h•gal)] (0.3097 kW/L) of stored water, and gas-fired storage water heaters with a rated input both greater than 105 000 Btu/h (30.8 kW) and less than 4000 British thermal units per hour per gallon [Btu/(h•gal)] (0.3097 kW/L) of stored water.

  Exceptions:

  (1) Water heaters installed in individual dwelling units.

  (2) Individual gas water heaters with input capacity not greater than 100 000 Btu/h (29.3 kW). [ASHRAE 90.1:7.5.3] L 503.4.4 Heat Recovery for Service Water Heating. Condenser heat recovery systems shall be installed for heating or preheating of service hot water provided all of the following are true:

  (1) The facility operates 24 hours a day.

  (2) The total installed heat rejection capacity of the water-cooled systems exceeds 6 000 000 Btu/h (1758 kW) of heat rejection.

  (3) The design service water-heating load exceeds 1 000 000 Btu/h (293 kW). [ASHRAE 90.1:6.5.6.2.1]

  512 2025 CALIFORNIA PLUMBING CODE

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

  APPENDIX L

  L 503.4.5 Capacity. The required heat recovery system shall have the capacity to provide the smaller of:

  (1) Sixty percent of the peak heat-rejection load at design conditions or

  (2) Preheat of the peak service hot-water draw to 85°F (29°C).

  Exceptions:

  (1) Facilities that employ condenser heat recovery for space heating with a heat recovery design exceeding 30 percent of the peak water-cooled condenser load at design conditions.

• CPC § 2999B-030 High relevance — show source text

  This document describes the options available and requirements of Wholesale Distribution Customers (Other Utilities or Customers which can connect to PG&Es Primary Voltage Distribution System and receive energy at Wholesale Rates as defined in the Wholesale Distribution Tariff − WDT). These Distribution Customers must have an executed Wholesale Distribution Tariff and Service Agreement (SA) filed with FERC (Federal Energy Regulatory Commission) to be eligible for these options of Interconnection. Excluded from this Document and disallowed are new WDT Connections at Secondary Voltage Levels (Below 600 Vac) as well as connections to Network Primary Voltage Circuits and Network Secondary Voltage Systems.

  This document details the equipment and connections requirements to safely interconnect to PG&E’s Electric Distribution System. These connections require clearly separated asset ownership while allowing for both parties (PG&E and the Wholesale Customer) to complete maintenance and operation tasks with little or minimal interaction requirements between the parties. Variations of these examples should be submitted through the Variance Process (TD−2951P−01 Request for Variance from Electric Distribution Standards) and discussed in advance with Electric Distribution Planning Departments prior to approval allowing Project progression. The intent of this document is that these generalized examples are the ONLY allowable configurations to be approved without an approved variance in the Electronic Document Routing System (EDRS). Variances are NOT precedent setting but rather are on a Project by Project Case.

  Distribution Customers must provide space and locations for the equipment identified in Table 1. The intent of the equipment requirements identified in Table 1 allow the Distribution Customer (WDT Eligible Electric Utility Customer) to function largely independent of the Distribution Provider (PG&E) while at the same time isolating failures to the Distribution Customers System from affecting the PG&E Distribution System.

  Table 1 Intervening Facility Requirements (WDT Customer Owned)

  Intervening Facility	Overhead	Underground
  Disconnect Switch	Required	Required
  Protective Device	Required	Required
  Wood Pole	Required	Not Required
  Conductor1	Required	Required

  1 The WDT Customer must own the conductor from either the Metering Panel or Protective Device depending on the Point of Interconnection (POI) which is discussed in the Application Section of this document

  Excluded from this Document are cases in which Generation is connected to the PG&E Distribution Grid. Retail Interconnection Projects are detailed in the Distribution Interconnection Handbook. Additionally, excluded from this document is the Document TD-2999B-030 Technical Requirements for Electric Service Interconnection at Primary Distribution Voltages. Document TD-2999B-030 applies to Retail Interconnections in contrast to this document which pertains to Wholesale Interconnections.

• CPC § 4.1 High relevance — show source text

  ASTM F2657 Standard Test Method for Out door Weathering Exposure of Crosslinked Polyethylene (PEX) Tubing

  AWWA (American Water Works Association)

  AWWA C904 Cross-Linked Polyethylene (PEX) Pressure Tubing, ½ In. (13 mm) Through 3 In. (76 mm), for Water Service

  IAPMO (International Association of Plumb- ing and Mechanical Officials)

  IAPMO/ANSI

  UPC-1 Uniform Plumbing Code

  PPI (Plastics Pipe Institute)

  PPI TR-3 Policies and Procedures for

  Developing Hydrostatic Design Basis (HDB), Hydrostatic Design Stresses (HDS), Pressure Design Basis (PDB), Strength Design Basis (SDB), Minimum Required Strength (MRS) Ratings, and Categorized Required Strength (CRS) for Thermoplastic Piping Materials or Pipe

  3 Abbreviations

  The following abbreviations apply in this Standard:

  CTS — copper tube size

  HDPE — high density polyethylene

  IC — insulation contact

  NTS — nominal tubing size

  PEX — crosslinked polyethylene

  SDR — standard dimension ratio

  UV — ultraviolet light

  4 General

  4.1 Tubing

  4.1.1 PEX tubing can be

  (a) pigmented throughout (i.e., with color); (b) non-pigmented (e.g., translucent or natural); or (c) coated with a pigmented layer. 4.1.2 PEX tubing is typically available in NTS-1/4 to NTS-3.

  4.1.3 Before installation, the installer shall review the tubing markings and verify that

  (a) the standard designation(s) of the fittings to which the tube can be joined to is included in the markings; (b) it bears a certification mark from an accredited certification organization; and (c) pressure and temperature ratings meet or exceed that of the intended end-use. 4.2 Fittings 4.2.1 Cold-Expansion Fittings

  Cold-expansion fittings typically are made of brass, stainless steel, or sulfone; consist of an insert and a PEX reinforcing ring; and are available in NTS-3/8 to NTS-3.

  4.2.2 Crimp or Press Insert Fittings

  Crimp or press insert fittings typically

  (a) are made of brass, stainless steel, or sulfone; (b) consist of an insert and a copper crimp ring or a stainless steel press ring (c) are available in NTS-3/8 to NTS-2 4.2.3 Compression Fittings

  Compression (i.e., transition) fittings typically

  (a) are made of brass; and (b) consist of (i) a nut, a compression ring, and an insert; or (ii) an O-ring brass insert with a compression sleeve. (c) are available in NTS-1/4 to NTS-3. 4.3 Installation

  Only fittings systems marked on the tubing shall be used for installation with that particular tubing.

  4.4 Tools

  Tools and tool accessories (e.g., tool heads) used for the installation of PEX tubing systems shall be in accordance with the manufacturer’s specifications and written instructions.

  4.5 Tubing Protection

  4.5.1 Abrasion

• CPC § 604.1.1 High relevance — show source text

  Exception: [OSHPD 1, 2, 3, 4 & 5] Use of CPVC is not per- mitted for potable water applications. 604.1.1 Local Authority to Approve CPVC Pipe Within Residential Buildings Under Specified Con- ditions. [HCD 1 & HCD 2] The local responsible build- ing official of any city, county, or city and county, shall authorize by permit the use of CPVC for hot and cold water distribution systems within the interior of residential build- ings provided all of the following conditions are satisfied:

  (a) Permit Conditions. Any building permit issued pur- suant to Section 604.1.1 shall be conditioned on compliance with the mitigation measures set forth in this section.

  (b) Approved Materials. Only CPVC plumbing mate- rial listed as an approved material and installed in accordance with this code may be used.

  (c) Installation and Use. Any installation and use of CPVC plumbing material pursuant to this section shall comply with all applicable requirements of this code and the manufacturer’s installation instructions.

  (d) Certification of Compliance. Prior to issuing a building permit pursuant to Section 604.1.1, the building official shall require as part of the permit- ting process that the contractor, or the appropriate plumbing subcontractors, provide written certifica- tion: (1) that is required in subdivision (e), and (2) that he or she will comply with the flushing proce- dures and worker safety measures of this code and the manufacturer’s installation instructions.

  (e) Worker Safety. Any contractor applying for a build- ing permit that includes the use of CPVC plumbing materials authorized pursuant to this section shall include in the permit application a signed written certification stating that:

  (1) They are aware of the health and safety hazards associated with CPVC plumbing installations;

  (2) They have included in their Injury and Illness Prevention Plan the hazards associated with CPVC plumbing pipe installations; and

  (3) The worker safety training elements of their Injury and Illness Prevention Plan meet the Department of Industrial Relation’s guidelines.

  (f) Findings of Compliance. The building official shall not give final permit approval of any CPVC plumbing materials installed pursuant to Section 604.1.1 unless he or she finds that the material has been installed in compliance with the requirements of this code and the manufacturer’s installation instructions.

  (g) Penalties. Any contractor or subcontractor found to have failed to comply with the flushing, ventilation, and glove requirements of this code and the manu- facturer’s installation instructions shall be subject to the penalties in Health and Safety Code, Division 13, Part 1.5, Chapter 6 (Section 17995 et seq.). In addition, if during the conduct of any building inspection the building official finds that the venti- lation and glove requirements of this code, are being violated, such building officials shall cite the con- tractor or subcontractor for that violation.

  (h) Special Requirements for CPVC Installation within Residential Structures. In addition to the other requirements in the California Plumbing Code, all installations of CPVC pipe within resi- dential structures shall meet the following:

• CPC § 10-23 High relevance — show source text

  |Yes|NP|NPb|NP| |Storage or equipment rooms where the
  inactive leaf is not needed to meet egress
  capacity requirements.|No|Pa|P|P| |Storage or equipment rooms where the
  inactive leaf is not needed to meet egress
  capacity requirements.|Yes|Pa|P|P| |P = Permitted. NP = Not Permitted.
  a.
  Not permitted on corridor doors in Group I-2 occupancies where corridor doors are required to be positive latching.
  b.
  Permitted where both doors are self-closing or automatic-closing, and are provided with a coordinator that causes the inactive leaf to be closed prior to the active leaf.|P = Permitted. NP = Not Permitted.
  a.
  Not permitted on corridor doors in Group I-2 occupancies where corridor doors are required to be positive latching.
  b.
  Permitted where both doors are self-closing or automatic-closing, and are provided with a coordinator that causes the inactive leaf to be closed prior to the active leaf.|P = Permitted. NP = Not Permitted.
  a.
  Not permitted on corridor doors in Group I-2 occupancies where corridor doors are required to be positive latching.
  b.
  Permitted where both doors are self-closing or automatic-closing, and are provided with a coordinator that causes the inactive leaf to be closed prior to the active leaf.|P = Permitted. NP = Not Permitted.
  a.
  Not permitted on corridor doors in Group I-2 occupancies where corridor doors are required to be positive latching.
  b.
  Permitted where both doors are self-closing or automatic-closing, and are provided with a coordinator that causes the inactive leaf to be closed prior to the active leaf.|P = Permitted. NP = Not Permitted.
  a.
  Not permitted on corridor doors in Group I-2 occupancies where corridor doors are required to be positive latching.
  b.
  Permitted where both doors are self-closing or automatic-closing, and are provided with a coordinator that causes the inactive leaf to be closed prior to the active leaf.|

  2025 CALIFORNIA FIRE CODE 10-23

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

  �

  MEANS OF EGRESS

  [BE] 1010.2.5 Closet doors. Closet doors that latch in the closed position shall be openable from inside the closet.

  [BE] 1010.2.6 Stairway doors. Interior stairway means of egress doors shall be openable from both sides without the use of a key or special knowledge or effort.

  Exceptions:

  1. Stairway discharge doors shall be openable from the egress side and shall only be locked from the opposite side.
  2. This section shall not apply to doors arranged in accordance with Section 403.5.3 of the California Building Code .
  3. Stairway exit doors shall not be locked from the side opposite the egress side, unless they are openable from the egress side and capable of being unlocked simultaneously without unlatching by any of the following methods: 3.1. Shall be capable of being unlocked individually or simultaneously upon a signal from the fire command center, where present, or a signal by emergency personnel from a single location inside the main entrance to the building. 3.2. Shall unlock simultaneously upon activation of a fire alarm signal when a fire alarm system is present in an area served by the stairway. 3.3.
• CPC § 101.2.2 Medium relevance — show source text

  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

  16-4 2025 CALIFORNIA EXISTING BUILDING CODE

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

  REFERENCED STANDARDS

  CRC—25: California Residential Code

  101.2, 101.4.1, 104.3.1, 109.3.3, 109.3.10, 302.2, 307.1, 308.1, 401.3, 402.1, 405.2.6, 502.2, 502.3, 502.4, 503.2, 503.3, 503.11, 505.2, 505.3, 507.3, 701.3, 702.4, 702.5, 706.2, 708.1, 805.2, 806.4, 809.1, 906.2, 907.1, 1011.2.1, 1103.1, 1103.2, 1103.3, 1104.1, 1201.4, 1302.1.2, 1302.1.3, 1302.1.3, 1303.1.3, 1401.2, 1402.1, 1402.2, 1402.2.1, 1402.3, 1402.4, 1402.5, 1402.6

  ICC 300—2023: ICC Standard on Bleachers, Folding and Telescopic Seating and Grandstands

  301.1.1, 401.1.1, 1401.1.1

  ICC A117.1—2017: Accessible and Usable Buildings and Facilities

• CPC § 0.5 High relevance — show source text

  in.|≤ 100 sq. in. =
  D-H-90
  >100 sq. in.=
  D-H-W-90|Not
  Permitted|2|Not
  Permitted|W-120| |Double fire walls
  constructed in
  accordance with
  NFPA 221|2|1|1|100 sq. in.|≤ 100 sq. in. =
  D-H-60
  > 100 sq. in. =
  D-H-W-60|Not
  Permitted|1|Not
  Permitted|W-60| |Enclosures for
  shafts, interior exit
  stairways and inte-
  rior exit ramps.|2|2|11/ 2|100 sq. in.b|≤100 sq. in. =
  D-H-90
  > 100 sq. in.=
  D-H-T-W-90|Not
  Permitted|2|Not
  Permitted|W-120| |Horizontal exits in
  fire wallsg|4|4|3|100 sq. in.|≤100 sq. in. =
  D-H-180
  > 100 sq. in.=
  D-H-W-240|Not
  Permitted|4|Not
  Permitted|W-240| |Horizontal exits in
  fire wallsg|3|3|3d|100 sq. in.|≤100 sq. in. =
  D-H-180
  > 100 sq. in.=
  D-H-W-180|Not
  Permitted|3|Not
  Permitted|W-180| |Fire barriers having
  a required fire-
  resistance rating of
  1 hour: Enclosures
  for shafts, exit
  access stairways,
  exit access ramps,
  interior exit stair-
  ways and interior
  exit ramps; and exit
  passageway walls|1|1|1|100 sq. in.|≤100 sq. in. =
  D-H-60
  >100 sq. in.=
  D-H-T-W-60|Not
  Permitted|1|Not
  Permitted|W-60| |||||||Fire protection|Fire protection||| |Other fire barriers|1|1|3/ 4|Maximum
  size tested|D-H-45|3/ 4
  h|3/ 4
  h|D-H-45h|D-H-45h| |Fire partitions:
  Corridor walls|1|1|1/ 3
  a|Maximum
  size tested|D-20|3/ 4
  a|3/ 4
  a|D-H-OH-45|D-H-OH-45| |Fire partitions:
  Corridor walls|0.5|0.5|1/ 3
  a|Maximum
  size tested|D-20|1/ 3|1/ 3|D-H-OH-20|D-H-OH-20|

  7-28 2025 CALIFORNIA BUILDING CODE

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

  FIRE AND SMOKE PROTECTION FEATURES

  |TABLE 716.1(2)—OPENING FIRE PROTECTION ASSEMBLIES,

• CPC § 6-3 High relevance — show source text

  ” Division 1, “Housing and Community](https://govt.westlaw.com/calregs/Document/I63FDC8F082C911E2BD79AA7206D382EB?viewType=FullText&originationContext=documenttoc&transitionType=CategoryPageItem&contextData=(sc.Default)) Development,” Chapter 2, “Mobilehome Parks and Installations,” Article 7, “MH-Unit and Commercial Modular Installations and Facilities,” Section 1333, “Foundation Systems.”

  B. PG&E will make an exception and install utility services to a location where mobile homes may be moved, including mobile home parks, under certain, specific conditions.

  1. The mobile homes must be served by meter pedestals or other PG&E-approved services and the meter facilities must be installed at a fixed location.

  2. Applicants are responsible for connecting their mobile homes to those fixed locations and to the meter pedestals or other utility facilities.

  See Numbered Document 052521, “Electrical Service Requirements for Mobile Home Developments,” for more information and for specifications. This PG&E document is included in Appendix C, “Electric and Gas Engineering Documents,” and also in PG&E’s Electric Underground Construction Manual, Book 1.

  6-3 2022 – 2023

  Section 6, Electric Metering: Residential

  6.4. Services

  6.4.1. Single Meter: Underground Service

  A. Services, 0 Amps Through 225 Amps, Single Phase

  Figure 6-1, “Typical Underground Service-Termination Enclosure, Combination Meter-Socket Panel (Residential, 0 Amps−225 Amps),” on Page 6-5, illustrates a single, underground, residential, single-phase meter panel (i.e., 4 terminal for a 120/240-volt service and 5 terminal for a 120/208-volt service).

• CPC § 1327.7 High relevance — show source text

  1327.7 Standing Pressure Tests for Oxygen and Nitrous Oxide Piping . . . . . . . . . . . . . . . . . . . . . .301

  1327.8 Verifier Operational Pressure Test . . . . . . . . . . . . . . . .302

  CHAPTER 14 FIRESTOP PROTECTION . . . . . .303

  1401.0 General . . . . . . . . . . . . . . . . . . . . .305

  1401.1 Applicability . . . . . . . . . . . . . . . . . .305

  2025 CALIFORNIA PLUMBING CODE xliii

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

  TABLE OF CONTENTS

  1402.0 Construction Documents . . . . . . .305

  1402.1 Penetrations . . . . . . . . . . . . . . . . .305

  1403.0 Installation . . . . . . . . . . . . . . . . . .305

  1403.1 Materials . . . . . . . . . . . . . . . . . . . .305

  1404.0 Combustible Piping Installations . . . . . . . . . . . . . . . . . .305

  1404.1 General Requirements . . . . . . . . .305

  1404.2 Fire-Resistance Rating . . . . . . . . .305

  1404.3 Firestop Systems . . . . . . . . . . . . .305

  1404.4 Connections . . . . . . . . . . . . . . . . .305

  1404.5 Insulation and Coverings . . . . . . .305

  1404.6 Sleeves . . . . . . . . . . . . . . . . . . . . .305

  1405.0 Noncombustible Piping Installations . . . . . . . . . . . . . . . . . .305

  1405.1 General Requirements . . . . . . . . .305

  1405.2 Fire-Resistance Rating . . . . . . . . .305

  1405.3 Firestop Systems . . . . . . . . . . . . .305

  1405.4 Connections . . . . . . . . . . . . . . . . .305

  1405.5 Unshielded Couplings . . . . . . . . . .306

  1405.6 Sleeves . . . . . . . . . . . . . . . . . . . . .306

  1405.7 Insulation and Coverings . . . . . . .306

  1406.0 Required Inspection . . . . . . . . . . .306

  1406.1 General . . . . . . . . . . . . . . . . . . . . .306

  1406.2 Examination . . . . . . . . . . . . . . . . .306

  1406.3 Penetrations . . . . . . . . . . . . . . . . .306

  1406.4 Field Installations . . . . . . . . . . . . .306

  CHAPTER 15 ALTERNATE WATER SOURCES

  FOR NONPOTABLE

  APPLICATIONS . . . . . . . . . . . . . .307

• CPC § 2.6 High relevance — show source text

  70 (2.6 L)|≤ 0.79 (3 L)| |Multiple Tank Conveyor|≤ 0.54 (2 L)|≤ 0.54 (2 L)| |Stationary Single Tank Door|≤ 0.89 (3.4 L)|≤ 1.18 (4.5 L)| |Under Counter|≤ 0.86 (3.3 L)|≤ 1.19 (4.5 L)| |Pot, Pan and Utensil|≤ 0.58 GPSF|≤ 0.58 GPSF| |Single Tank Flight Type|GPH ≤ 2.975x + 55.00|GPH ≤ 2.975x + 55.00| |Multiple Tank Flight Type|GPH ≤ 4.96x + 17.00|GPH ≤ 4.96x + 17.00| |Note: GPSF = gallons per square foot of rack; GPH = gallons per hour;
  X = square feet of conveyor belt/minute (max conveyor speed sf/min as tested and certified to NSF/ANSI Standard 3)|Note: GPSF = gallons per square foot of rack; GPH = gallons per hour;
  X = square feet of conveyor belt/minute (max conveyor speed sf/min as tested and certified to NSF/ANSI Standard 3)|Note: GPSF = gallons per square foot of rack; GPH = gallons per hour;
  X = square feet of conveyor belt/minute (max conveyor speed sf/min as tested and certified to NSF/ANSI Standard 3)|

  APPENDIX A5-20 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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

  APPENDIX A5 — NONRESIDENTIAL VOLUNTARY MEASURES

  A5.303.4 Water conserving plumbing fixtures and fittings.

  A5.303.4.1 Nonwater urinals. Nonwater urinals with drain cleansing action are installed in accordance with the California Plumbing Code .

  Where approved, nonwater urinals with drain cleansing action (formerly urinal, hybrids) as defined in Chapter 2, shall be considered waterless urinals.

  A5.303.5 Dual plumbing. New buildings and facilities shall be dual plumbed for potable and recycled water systems for toilet flushing when recycled water is available as determined by the enforcement authority.

  SECTION A5.304—OUTDOOR WATER USE

  A5.304.1 Reserved.

  A5.304.2 Outdoor water use. For new water service not subject to the provisions of Water Code Section 535, separate meters or submeters shall be installed for indoor and outdoor potable water use for landscaped areas of at least 500 square feet but not more than 1,000 square feet.

  A5.304.6 Restoration of areas disturbed by construction. Restore all landscape areas disturbed during construction by planting with local adaptive and/or noninvasive vegetation.

  A5.304.7 Previously developed sites. On previously developed or graded sites, restore or protect at least 50 percent of the site area with adaptive and/or noninvasive vegetation. Projects complying with Section A5.106.3, Item 3 may apply vegetated roof surface to this calculation if the roof plants meet the definition of adaptive and noninvasive.

  Exception: Area of the building footprint is excluded from the calculation.

• CPC § 1009.6.1 Medium relevance — show source text

  11B- 1009.6.1 Pool stairs. Pool stairs shall comply with Section 11B- 504 .

  Exception: Pool step riser heights shall not be required to be 4 inches ( 102 mm) high minimum and 7 inches ( 178 mm) high maximum provided that riser heights are uniform.

  11B- 1009.6.2 Handrails. The width between handrails shall be 20 inches ( 508 mm) minimum and 24 inches (610 mm) maximum. Handrail extensions required by Section 11B- 505.10.3 shall not be required on pool stairs.

  SECTION 11B- 1010 — SHOOTING FACILITIES WITH FIRING POSITIONS

  11B- 1010.1 Turning space. A circular turning space 60 inches ( 1524 mm) diameter minimum with slopes not steeper than 1:48 shall be provided at shooting facilities with firing positions.

  2025 CALIFORNIA BUILDING CODE 11B-151

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

  11B-152 2025 CALIFORNIA BUILDING CODE

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

  CALIFORNIA BUILDING CODE – MATRIX ADOPTION TABLE

  CHAPTER 12 – INTERIOR ENVIRONMENT

  (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	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								X	X
  Adopt entire chapter as amended (amended sections listed below)	X			X	X					X	X	X	X	X	X	X
  Adopt only those sections that are listed below		X	X														X	X	X			X
  Chapter / Section
  1202.1				X	X
  1202.2.1				X	X
  1202.

• CPC § 1507.7.8 Medium relevance — show source text

  1507.7.8 Additional requirements. [DSA-SS & DSA-SS/CC, OSHPD 1, 1R, 2, 4 & 5] In addition to the requirements of Section 1507.7.5, the installation of slate shingle roof coverings shall comply with the requirements of Sections 1507.3.6 and 1507.3.7, and the seismic anchorage provisions of Section 1513.

  1507.8 Wood shingles. The installation of wood shingles shall comply with the provisions of this section and Table 1507.8.

  TABLE 1507.8—WOOD SHINGLE AND SHAKE INSTALLATION	Col2	Col3
  ROOF ITEM	WOOD SHINGLES	WOOD SHAKES
  1. Roof slope	Wood shingles shall be installed on slopes of not less than 3 units vertical in 12 units hori- zontal (3:12).	Wood shakes shall be installed on slopes of not less than 4 units vertical in 12 units horizontal (4:12).
  2. Deck requirement	2. Deck requirement	2. Deck requirement
  Temperate climate	Shingles shall be applied to roofs with solid or spaced sheathing. Where spaced sheathing is used, sheathing boards shall be not less than 1″ × 4″ nominal dimensions and shall be spaced on centers equal to the weather expo- sure to coincide with the placement of fasteners.	Shakes shall be applied to roofs with solid or spaced sheathing. Where spaced sheathing is used, sheath- ing boards shall be not less than 1″ × 4″ nominal dimensions and shall be spaced on centers equal to the weather exposure to coincide with the placement of fasteners. Where 1″ × 4″ spaced sheathing is installed at 10 inches, boards must be installed between the sheathing boards.
  In areas where the average daily temperature in January is 25°F or less or where there is a possibility of ice forming along the eaves causing a backup of water.	Solid sheathing is required.	Solid sheathing is required.
  3. Interlayment	No requirements.	Interlayment shall comply with ASTM D226, Type 1.
  4. Underlayment	4. Underlayment	4. Underlayment
  Temperate climate	Underlayment shall comply with Section 1507.1.1.	Underlayment shall comply with Section 1507.1.1.
  5. Application	5. Application	5. Application
  Attachment	Fasteners for wood shingles shall be hot- dipped galvanized or Type 304 (Type 316 for coastal areas) stainless steel with a minimum penetration of 0.75 inch into the sheathing. For sheathing less than 0.5 inch thick, the fasteners shall extend through the sheathing.	Fasteners for wood shakes shall be hot-dipped galva- nized or Type 304 (Type 316 for coastal areas) with a minimum penetration of 0.75 inch into the sheath- ing. For sheathing less than 0.5 inch thick, the fasteners shall extend through the sheathing.
  No.

• CPC § 1.9.2.1. Medium relevance — show source text

  [DSA-SS] - For applications listed in Section 1.9.2.1.

  [DSA-SS/CC] - For applications listed in Section 1.9.2.2. 2. Office of Statewide Hospital Planning and Development (OSHPD) amendments appear in this chapter preceded by the appropriate acronym, as follows:

  [OSHPD 1] - For applications listed in Section 1.10.1.

  [OSHPD 1R] - For applications listed in Section 1.10.1.

  [OSHPD 2] - For applications listed in Section 1.10.2.

  [OSHPD 4] - For applications listed in Section 1.10.4.

  [OSHPD 5] - For applications listed in Section 1.10.5.

  2301.1.4 Reference to other chapters. [DSA-SS, DSA-SS/CC, OSHPD]

  2301.1.4.1 [DSA-SS and OSHPD 1 & 4] Where reference within this chapter is made to sections in Chapters 16, 17, 18, 19, 21 and 22, the provisions in Chapters 16A, 17A, 18A, 19A, 21A and 22A, respectively shall apply instead.

  2301.1.4.2 [DSA-SS/CC] Where reference within this chapter is made to sections in Chapters 17 and 18, the provisions in Chapters 17A and 18A respectively shall apply instead.

  2301.1.5 Prohibition. [DSA-SS & DSA-SS/CC & OSHPD 1, 1R, 2, 4 & 5] The following design methods, systems and materials are not permitted by DSA and OSHPD: 1. Straight-sheathed horizontal lumber diaphragms. 2. Gypsum-based sheathing shear walls and portland cement plaster shear walls. 3. Shear wall foundation anchor bolt washers in accordance with exception to AWC SDPWS Section 4.3.6.4.3.

  2025 CALIFORNIA BUILDING CODE 23-3

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

  WOOD

  4. Wood structural panel shear walls and diaphragms using staples as fasteners.

  5. Unblocked shear walls.

  6. Any wood structural panel sheathing used for diaphragms and shear walls that are part of the seismic force-resisting system, not applied directly to framing members. 7. Single and double diagonally sheathed lumber walls used to resist seismic forces. 8. Log structures in accordance with ICC 400. 9. [OSHPD 1, 1R, 2, 4 & 5] Cross-laminated timber used as part of the seismic force-resisting system, unless approved as an alternative system in accordance with Section 104.2.3. [DSA-SS, DSA-SS/CC] Not adopted by DSA.

• CPC § 5.105.2 Medium relevance — show source text

  Exception: Combined addition(s) to existing building(s) of two times the area or more of the existing building(s) is not eligible to meet compliance with Section 5.105.2 or Section A5.105.2.

  A5.409.2 Whole building life cycle assessment. Projects shall meet the minimum requirements of Section A5.409.2 for Tier 1 or Tier 2 compliance.

  A5.409.2.1 Tier 1. Projects shall conduct a cradle-to-grave whole building life cycle assessment meeting the requirements of Section 5.409.2 and performed in accordance with ISO 14040 and 14044, excluding operating energy, demonstrating a minimum 15-percent reduction in global warming potential (GWP) as compared to a reference baseline building of similar size, function, complexity, type of construction, material specification, and location that meets the requirements of all parts of the California Building Standards Code currently in effect. Software used to conduct the whole building life cycle assessment, including reference baseline building, shall have a data set compliant with ISO 14044, and ISO 21930 or EN 15804, and the software shall conform to ISO 21931 and/or EN 15978. The software tools and data sets shall be the same for evaluation of both the baseline building and the proposed building.

  Exception: For projects that include building reuse, the reference baseline building shall exclude the reused elements. The percent reduction in GWP shall be achieved through the design and construction of new project elements.

  A5.409.2.2 Tier 2. Projects shall conduct a cradle-to-grave whole building life cycle assessment meeting the requirements of Section 5.409.2 and performed in accordance with ISO 14040 and ISO 14044, excluding operating energy, demonstrating a minimum 20-percent reduction in GWP as compared to a reference baseline building of similar size, function, complexity, type of construction, material specification, and location that meets the requirements of all parts of the California Building Standards Code currently in effect. Software used to conduct the whole building life cycle assessment, including reference baseline building, shall have a data set compliant with ISO 14044, and ISO 21930 or EN 15804, and the software shall conform to ISO 21931 and/or EN 15978. The software tools and data sets shall be the same for evaluation of both the baseline building and the proposed building.

  Exception: For projects that include building reuse, the reference baseline building shall not be of new construction and shall retain existing materials. The percent reduction in GWP shall be achieved through the design and construction of new project elements.

  A5.409.2.3 Verification of compliance. A summary of the GWP analysis produced by the software and Worksheet WS-7 signed by the design professional of record shall be provided in the construction documents as documentation of compliance. A copy of the whole building life cycle assessment which includes the GWP analysis produced by the software, in addition to maintenance and training information, shall be included in the operation and maintenance manual and shall be provided to the owner at the close of construction. The enforcing agency may require inspection and inspection reports in accordance with Sections 702.2 and 703.1 during and at completion of construction to demonstrate substantial conformance. Inspection shall be performed by the design professional of record or third party acceptable to the enforcing agency.

  A5.409.3 Product GWP compliance—prescriptive path. Each product that is permanently installed and listed in Table A5.409.3 shall have a Type III environmental product declaration (EPD), either product-specific or factory-specific.

• CPC § 1.11.0. Medium relevance — show source text

  This 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 1.11.0.

  2025 CALIFORNIA PLUMBING CODE 543

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  544 2025 CALIFORNIA PLUMBING CODE

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  APPENDIX R

  TINY HOUSES

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

  R 101.0 Tiny Houses.

  R 101.1 Applicability. This appendix shall apply to structures permanently attached to a foundation. The tiny house plumbing systems shall be designed and installed in accordance with the requirements of this appendix and the requirements of this code. The provision of this appendix shall apply to permanent structures of 400 square feet (37 m [2] )or less. The provisions of this appendix shall not apply to recreational vehicles as defined in NFPA 1192 or to manufactured homes

  as defined in NFPA 501A.

  R 102.0 Definitions.

  R 102.1 General. For purposes of this appendix, the following definition shall apply:

  Tiny House. A single family dwelling that, is not greater than 400 square feet (37 m [2] ), not including loft area.

  R 103.0. General.

  R 103.1 Permits and Construction Documents. Per mits and construction documents shall be submitted and approved in accordance with Section 104.0. R 103.2 Fuel-Gas Piping System. Gas piping system shall be sized and installed in accordance with Chapter 12.

  R 103.3 Water Heaters. Water heaters shall be installed in accordance with Chapter 5 and the manufacturer’s recommendations and instructions.

  R 103.4 Potable Water Sources. Where a public water supply system is available, it shall be used. Private or alternate water sources shall comply with the potable water standards of the state, and local health authority. R 103.5 Water Supply to Fixtures. Each plumbing fixture shall be provided with an adequate supply of potable water in accordance with Chapter 6.

  R 103.6 Protection of Potable Water. The potable water supply shall be protected from pollution and contamination in accordance with Section 602.0 and Section 603.0. Backflow prevention shall be in accordance with Table 603.2.

  R 103.7 Water-Treatment Equipment. Where installed, water-treatment equipment shall comply with the requirements of Section 611.0.

  R 103.8 Testing. Installations of water supply, drainage, and venting systems shall be tested and inspected in accordance with the requirements of this code.

  R 201.0 Tiny House Fixtures.

  R 201.1 Fixtures. Plumbing fixtures shall comply with the requirements of Chapter 4.

  R 201.2 Kitchen. Each tiny house shall be provided with a kitchen sink.

  R 201.3 Bathroom. Each tiny house shall be provided with not less than one water closet, one lavatory, and one bath, shower or combination bath/shower.

• CPC § 11.5 Medium relevance — show source text

  5-foot
  level of storage
  3.
  Locate in
  longitudinal flue
  space,
  staggered
  vertical
  4.
  Shields required
  where multiple-
  level|1.
  Ordinary
  temperature,
  quick-response
  sprinklers,
  maximum 8 feet
  3 inches
  horizontal
  spacing
  2.
  One line of
  sprinklers at the
  6-foot level and
  the 11.5-foot
  level of storage
  3.
  Locate in
  longitudinal flue
  space,
  staggered
  vertical
  4.
  Shields required
  where multiple-
  level| |TABLE 5704.3.6.3(8)—AUTOMATIC SPRINKLER PROTECTION REQUIREMENTS FOR
  CLASS I LIQUID STORAGE IN METAL CONTAINERS OF 1-GALLON CAPACITY OR LESS WITH UNCARTONED
  OR CASE-CUT SHELF DISPLAY UP TO 6.5 FEET, AND PALLETIZED STORAGE ABOVE IN A DOUBLE-ROW RACK ARRAYa|CEILING SPRINKLER DESIGN AND DEMAND|Maximum
  spacing|Maximum
  spacing|100 ft2/head|100 ft2/head| |TABLE 5704.3.6.3(8)—AUTOMATIC SPRINKLER PROTECTION REQUIREMENTS FOR
  CLASS I LIQUID STORAGE IN METAL CONTAINERS OF 1-GALLON CAPACITY OR LESS WITH UNCARTONED
  OR CASE-CUT SHELF DISPLAY UP TO 6.5 FEET, AND PALLETIZED STORAGE ABOVE IN A DOUBLE-ROW RACK ARRAYa|CEILING SPRINKLER DESIGN AND DEMAND|Area
  (square feet)|Ordinary
  temperature|Not
  Applicable|Not
  Applicable| |TABLE 5704.3.6.3(8)—AUTOMATIC SPRINKLER PROTECTION REQUIREMENTS FOR
  CLASS I LIQUID STORAGE IN METAL CONTAINERS OF 1-GALLON CAPACITY OR LESS WITH UNCARTONED
  OR CASE-CUT SHELF DISPLAY UP TO 6.5 FEET, AND PALLETIZED STORAGE ABOVE IN A DOUBLE-ROW RACK ARRAYa|CEILING SPRINKLER DESIGN AND DEMAND|Area
  (square feet)|High
  temperature|2,000b|2,000b| |TABLE 5704.3.6.3(8)—AUTOMATIC SPRINKLER PROTECTION REQUIREMENTS FOR
  CLASS I LIQUID STORAGE IN METAL CONTAINERS OF 1-GALLON CAPACITY OR LESS WITH UNCARTONED
  OR CASE-CUT SHELF DISPLAY UP TO 6.5 FEET, AND PALLETIZED STORAGE ABOVE IN A DOUBLE-ROW RACK ARRAYa|CEILING SPRINKLER DESIGN AND DEMAND|Density
  (gpm/ft2)|Density
  (gpm/ft2)|0.60|0.60| |**TABLE 5704.3.6.

• CPC § 11B-141 Medium relevance — show source text

  11B-1004 Exercise Machines and Equipment . . . . . . . . . . . . . 11B-141

  11B-1005 Fishing Piers and Platforms. . . . . . . . . . . . . . . . . . . . 11B-141

  11B-1006 Golf Facilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11B-142

  11B-1007 Miniature Golf Facilities. . . . . . . . . . . . . . . . . . . . . . . . 11B-142

  11B-1008 Play Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11B-143

  11B-1009 Swimming Pools, Wading Pools and Spas . . . . . . 11B-145

  11B-1010 Shooting Facilities with Firing Positions . . . . . . . . 11B-151

  CHAPTER 12 INTERIOR ENVIRONMENT . . . . . . . . . . . . . . 12-1

  1201 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-3

  1202 Ventilation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-3

  1203 Temperature Control . . . . . . . . . . . . . . . . . . . . . . . . . . 12-6

  1204 Lighting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-7

  1205 Yards or Courts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-7

  1206 Sound Transmission . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-8

  1207 Enhanced Classroom Acoustics . . . . . . . . . . . . . . . . . 12-8

  1208 Interior Space Dimensions . . . . . . . . . . . . . . . . . . . . . 12-8

  1209 Access to Unoccupied Spaces. . . . . . . . . . . . . . . . . . . 12-9

  1210 Toilet and Bathroom Requirements . . . . . . . . . . . . . 12-9

  1211 UV Germicidal Irradiation Systems . . . . . . . . . . . . . 12-10

  1212 [HCD 1 & HCD 2] Garage Door Springs . . . . . . . . . . . .12-10

  1213 [HCD 1] Pollutant Control . . . . . . . . . . . . . . . . . . . . . . .12-11

• CPC § 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

• CPC § 6-26 Medium relevance — show source text

  Table 41 Specifications for Aluminum Pin Terminal [1]

  Copper/ Al. Cable Size	Copper Stud Equivalent	Approved for Purchase	Col4	Col5	Col6	Col7	Col8	Col9	Col10	Col11	6-Ton Tool Die # 1 12-Ton Tool Die # 15-Ton Tool Die #
  Copper/ Al. Cable Size	Copper Stud Equivalent	Manufacturer and Catalog Number	Manufacturer and Catalog Number	Dimension (inches)	Dimension (inches)	Dimension (inches)	Dimension (inches)	Dimension (inches)	Dimension (inches)	Code	Code
  Copper/ Al. Cable Size	Copper Stud Equivalent	Homac	Brundy	A	B	OD	E Approx.	L Approx.	P	P	P
  6	8	SAPT-6-26	YE6R-40	0.250	1.75	0.65	3.25	9.25	6.00	303843	W-BG U-BG U-BG2
  2	4	SAPT-2-26	TE2R-40	0.250	1.75	0.65	3.25	9.25	6.00	303844	303844
  1/0	2	SAPT-1/0-26	YE25R-60	0.250	1.75	0.65	3.25	9.25	6.00	303845	303845
  4/0	2/0	SAPT-4/0-206	YE28R-60	0.375	1.54	0.91	3.50	10.9	6.00	303846	W249 U249 U2492
  350	4/0	PTB-350-6	YE31AG3	0.460	2.25	1.12	4.70	10.7	6.00	303554	− U31ART U31ART2
  500/60 0	500	PTM-500-346	YE34AP- GE	0.750	2.56	1.57	6.30	12.3	6.00	300013	− U34ART3 U34ART2,3
  700	500	PTL-750	YE39AGB	0.750	2.56	1.60	6.30	12.3	6.00	303555	− − P39ART
  1,000	700	PTF-1000-34 6	YE44AG7	0.750	2.56	1.60	6.30	12.3	6.00	033757	− − P44ART

• CPC § 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

• CPC § 1801.1 Medium relevance — show source text

  Materials for piping and tubing must meet the working temperature and pressure of the system. Furthermore, materials must be compatible with the transfer medium to prevent deformation, bursting, or any chemical action between the material and the transfer medium. Approved materials for indoor piping, fittings, and accessories that are a part of a groundwater system as well as the allowable joining methods for piping or tubing are provided for application and enforcement purposes.

  Chapter 18 Referenced Standards. Chapter 18 provides two comprehensive tables with referenced standards. The standards listed in Table 1801.1 are applied as indicated in the applicable reference section(s). A list of additional approved standards, publications, practices, and guides that are not referenced in specific sections appear in Table 1801.2.

  Referenced standards set forth specific details of accepted practices, materials specifications, or test methods in many specialized applications. Standards provide an efficient method of conveying complex information and specifications on the performance requirements for materials, products, systems, application, and installation. The manner and purpose for a standard’s use and, in turn, code compliance, must be definitive in all references to the standard. If the standard is intended to be a requirement for judging code compliance, the code must state its intent for use. The standard should adequately address a defined need and at the same time specify the minimum performance requirements, technical characteristics and methods of testing, and required test results.

  The referenced standards tables are organized in a manner that makes it easy to find specific standards in alphabetical order, and by acronym of the publishing agency of the standard. The tables list the title of the standard, the edition, and any addenda. Contact information for each publishing agency is provided at the end of the chapter.

  Appendix A Residential Plans Examiner Review Form for HVAC System Design. A residential plans examiner review form is located in this appendix as an example to assist users in identifying whether the HVAC system has followed the approved procedures for system design (loads, equipment, and ducts).

  Appendix B Procedures to be Followed to Place Gas Equipment in Operation. Appendix B provides requirements for the procedures that apply after an appliance is installed in place, piped, and connected to its venting system. The requirements include adjusting the burner input, air adjustments, verifying operation of safety shutoffs, automatic ignition, and protective devices, checking draft for vent-connected appliances, and operating instructions.

  Appendix C Installation and Testing of Oil (Liquid) Fuel-Fired Equipment. Appendix C governs the installation, testing, or repair of oil or liquid fuel-burning equipment used in buildings or structures and equipment.

  Appendix D Fuel Supply: Manufactured/Mobile Home Parks and Recreational Vehicle Parks. The provisions of this appendix apply to the fuel gas piping systems of mobile home and recreational vehicle parks. These provisions also apply to the use, maintenance, and installation for supplying fuel gas for accessory buildings or structures, and building components.

  2025 CALIFORNIA MECHANICAL CODE xvii

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

  FORMAT OF THE UNIFORM MECHANICAL CODE

  Appendix E Sustainable Practices. This appendix provides a comprehensive set of technically sound provisions that encourage sustainable practices and works toward improving the design and construction of mechanical systems that result in a positive long-term environmental impact. Environmental sustainability is important because it involves natural resources that human beings need for economic or manufactured capital. Their sustainability is defined by their reliance

• CPC § 7-4 Medium relevance — show source text

  7-4 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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

  CALIFORNIA GREEN BUILDING STANDARDS CODE – MATRIX ADOPTION TABLE

  CHAPTER 8 – COMPLIANCE FORMS, WORKSHEETS AND REFERENCE MATERIAL

  (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	OSHPD	Col11	Col12	Col13	Col14	Col15	BSCC	DPH	AGR	DWR	CEC	CA	SL	SLC
  Adopting agency	BSC	BSC- CG	SFM	1	2	1/AC	AC	SS	1	1R	2	3	4	5	5	5	5	5	5	5	5	5
  Adopt entire CA chapter		X
  Adopt entire chapter as amended (amended sections listed below)
  Adopt only those sections that are listed below								X
  Chapter/Section
  WS-3								X
  WS-4								X
  WS-5								X
  WS-9								X
  IES TM-15-11 Table A-1								X
  Table 130.2-A								X
  Table 1302.2-B								X

  2025 CALIFORNIA GREEN BUILDING STANDARDS CODE 8-1

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

  8-2 2025 CALIFORNIA GREEN BUILDING STANDARDS CODE

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

  8 COMPLIANCE FORMS, WORKSHEETS AND REFERENCE MATERIAL

  [BSC] Sample forms found in “A Guide to the California Green Building Standards Code (Nonresidential)” located at https://www.dgs.ca.gov/BSC/Resources/Page-Content/Building-Standards-Commission-Resources-List-Folder/CALGreen may be used to assist in documenting compliance with the waste management plan and other provisions of this code.

  [HCD 1] Sample forms located at www.hcd.ca.gov/building-standards/calgreen/cal-green-forms.shtml may be used to assist in documenting compliance with CALGreen . WORKSHEET (WS-1) BASELINE WATER USE