CPC · California Plumbing Code

How are referenced standards incorporated into CPC definitions?

The CPC incorporates outside technical standards into the code by listing them in Chapter 17 (Table 1701.1) and then requiring products to be listed (third‑party certified) and marked to those standards; see **§ 301.2** and **§ 1701.1** for the rules and the AHJ‑approval route for unlisted materials.

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Last reviewed: July 6, 2026

What the code requires — 2-4 sentences

I could not locate § 220.0 or § 221.0 in the provided California Plumbing Code (CPC) files. The CPC provisions that actually govern how referenced standards are made part of the CPC (and how products and definitions rely on those standards) appear at § 301.2 (minimum standards, marking, listing) and Chapter 17 § 1701.1 (referenced standards list / Table 1701.1). See § 301.2 and § 1701.1 for the controlling text.

The single most important rule: standards listed in Chapter 17 (Table 1701.1) are considered part of the CPC requirements where the code references them; manufacturers must supply products that are third‑party listed and marked consistent with the applicable referenced standard and § 301.2.

Requirements in detail

Which standards become “part of the code”

Standards listed or referred to in Chapter 17 (Table 1701.1) are to be considered part of the requirements of the CPC where those standards are referenced. That means the CPC text + the referenced standard together define the requirement in that instance (§ 1701.1).

Listing, third‑party certification, and marking

Products used in plumbing systems must be listed (third‑party certified) by an accredited listing agency as complying with the applicable recognized referenced standard (§ 301.2).
Each length of pipe, fitting, trap, fixture, material, and device must be marked per the applicable referenced standard and with the manufacturer’s mark/name so the product is identifiable to the end user (§ 301.2.1). An exception exists for field‑cut nipples.

Partial application of a standard (when a standard covers multiple grades)

When a referenced standard covers multiple grades / weights / qualities / configurations, the CPC requires using the portion of the referenced standard that is applicable to the code requirement (the applicable portion is the one that matches the limitation in the CPC provision) (§ 301.2.2). If a standard contains many options, select only the portion required by the CPC text.

Authority Having Jurisdiction (AHJ) discretion / special permissions

Materials or designs not specifically provided for in the CPC may be permitted by special permission of the Authority Having Jurisdiction after the AHJ is satisfied of adequacy. That is the pathway for novel materials or unlisted assemblies (§ 301.2.2).

Where the standards are listed and how to read them

Table 1701.1 identifies the standard number, effective date, title, application, and the CPC section(s) that reference it. Apply the referenced standard as specified by the CPC section that cites it; do not assume all standards in the table apply everywhere (§ 1701.1).

Decision‑relevant summary table

Decision dimension	What to check / value	Code reference
Is a referenced standard part of the code?	Yes — only when listed/referred in Chapter 17 or when a CPC section references it.	§ 1701.1
Is third‑party listing required?	Yes — pipe/fittings/fixtures/devices must be listed (third‑party certified) to an applicable referenced standard (unless code allows otherwise).	§ 301.2
Product marking requirements	Products must be marked per the referenced standard and with manufacturer ID; field markings not acceptable (exception for cut nipples).	§ 301.2.1
If a standard covers multiple grades	Use only the portion applicable to the CPC requirement (grade/weight/configuration).	§ 301.2.2
If product not covered by the code/standards	Seek AHJ approval (special permission) with documentation of adequacy.	§ 301.2.2
Where to find the list of referenced standards	See Table 1701.1 in Chapter 17 — it lists standard number, effective date, title, application, and referenced CPC sections.	§ 1701.1 (Table 1701.1)

Exceptions & special cases

Exception to marking: nipples created from cutting and threading approved pipe need not be marked (§ 301.2.1).
When a referenced standard contains multiple options, only the applicable portion applies; you must identify which part of the standard is required by the CPC provision (§ 301.2.2).
For special materials or devices not covered in the CPC or referenced standards, the AHJ may permit their use after review and demonstration of adequacy (§ 301.2.2).

Common mistakes

Treating every standard in Chapter 17 as universally applicable — only the standard cited by the specific CPC section applies (§ 1701.1).
Installing products that meet a manufacturer’s in‑house specification but lack third‑party listing to the referenced standard — § 301.2 requires listing/certification.
Failing to verify the effective date / edition of a referenced standard listed in Table 1701.1 — the table identifies the standard number and effective date.
Assuming field markings are acceptable — the code requires manufacturer marking per the referenced standard; field markings are not acceptable except where the code explicitly allows (nipples).

Worked example — concrete scenario

Scenario: You plan to install Schedule 40 PVC pressure pipe, 2‑inch diameter, for a water supply branch in a commercial restroom.

Step 1 — Identify the CPC section that governs the piping you are using (for example, tables in Chapter 6 reference pipe materials and tables such as Table 604.1). Find the referenced standard in Table 1701.1 — e.g., ASTM D1785 for PVC pipe schedules is listed as a referenced standard for Table 604.1. Confirm the edition/effective date shown in Table 1701.1.

Step 2 — Confirm product certification: the pipe must be listed (third‑party certified) to the applicable referenced standard per § 301.2. Verify the manufacturer’s listing/certification report shows compliance to the ASTM D1785 edition named in Table 1701.1.

Step 3 — Marking: each length of pipe must be marked as required by the referenced standard and with the manufacturer’s mark/name so it can be identified on site, per § 301.2.1. If you are supplying cut nipples made from approved pipe, recall the marking exception for field‑cut nipples.

Step 4 — Use only the applicable portion: if ASTM D1785 covers multiple pressure schedules and colors, use the portion of that standard corresponding to Schedule 40 (the code requires selecting the applicable grade/portion) per § 301.2.2.

If the product is not third‑party listed or is a new material not covered by the CPC/standards, submit documentation to the AHJ for possible special permission per § 301.2.2.

Related provisions

§ 301.2 — Minimum standards; third‑party listing and general statement about materials and devices.
§ 301.2.1 — Marking requirements for pipe, fittings, traps, fixtures, materials, and devices.
§ 301.2.2 — Application of standards and AHJ discretion for materials not covered.
§ 1701.1 — Standards listed in Table 1701.1 are referenced and considered part of the code where cited.
Table 1701.1 (Chapter 17) — The inventory of referenced standards, edition/effective dates, application and the CPC sections that reference each standard.

Code references

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

CPC § 33.4.1.4 Medium relevance — show source text

(UN/DOT
test methods: Test N.5, Part III, subsection 33.4.1.4)| |Water
reactive|2|Materials that react violently with water or have the
ability to boil water. Materials that produce flammable,
toxic or other hazardous gases, or evolve enough heat
to cause autoignition of combustibles upon exposure
to water or moisture.|H261, Category 2; Contact with water releases flamma-
ble gas. Any substance or mixture which reacts readily
with water at ambient temperatures such that the
maximum rate of evolution of flammable gas is equal
to or greater than 20 liters per kilogram of substance
per hour, and which does not meet the criteria for
Category 1.| |Water
reactive|1|Materials that react with water with some release of
energy, but not violently.|H261, Category 3; Contact with water releases flamma-
ble gas. Any substance or mixture which reacts slowly
with water at ambient temperatures such that the
maximum rate of evolution of flammable gas is equal
to or greater than 1 liter per kilogram of substance per
hour, and which does not meet the criteria for Catego-
ries 1 and 2.| |a. The table illustrates that there is not perfect alignment between the_CFC_ and GHS definitions and provides information on similarities and difference between the two classi-
fication systems.|a. The table illustrates that there is not perfect alignment between the_CFC_ and GHS definitions and provides information on similarities and difference between the two classi-
fication systems.|a. The table illustrates that there is not perfect alignment between the_CFC_ and GHS definitions and provides information on similarities and difference between the two classi-
fication systems.|a. The table illustrates that there is not perfect alignment between the_CFC_ and GHS definitions and provides information on similarities and difference between the two classi-
fication systems.|

SECTION E105—REFERENCED STANDARDS

E105.1 General. See Table E105.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard identification with the effective date, standard title, and the section or sections of this appendix that reference the standard.

TABLE E105.1—REFERENCED STANDARDS	Col2	Col3
STANDARD ACRONYM	STANDARD NAME	SECTIONS HEREIN REFERENCED
CGA P-20—2009	Standard for Classification of Toxic Mixtures	E103.1.3.1
CGA P-23—2008	Standard for Categorizing Gas Mixtures Containing Flammable and Nonflammable Components	E102.1.2
DOL 29 CFR Part 1910—2023	Occupational Safety and Health Standards	E104.1
DOL 29 CFR Part 1910.1200—2012	Hazard Communication	E102.1.7.2, E104.1, E104.2
DOTn 49 CFR—2023	Transportation	E104.1
DOTn 49 CFR Part 173.127—2005	Class 5, Division 5.1—Definition and Assignment of Packing Groups	E102.1.7.2
UN ST/SG/AC.10/11 (Rev.

CPC § 301.2 Medium relevance — show source text
301.2 Minimum Standards. Pipe, pipe fittings, traps, fixtures, material, and devices used in a plumbing system shall be listed (third-party certified) by a listing agency (accredited conformity assessment body) as complying with the approved applicable recognized standards referenced in this code, and shall be free from defects. Unless otherwise provided for in this code, materials, fixtures, or devices used or entering into the construction of plumbing systems, or parts thereof shall be submitted to the Authority Having Jurisdiction for approval prior to being installed. 301.2.1 Marking. Each length of pipe and each pipe fitting, trap, fixture, material, and device used in a plumbing system shall have cast, stamped, or indelibly marked on it any markings required by the applicable referenced standards and listing agency, and the manufacturer’s mark or name, which shall readily identify the manufacturer to the end user of the product. Where required by the approved standard that applies, the product shall be marked with the weight and the quality of the product. Materials and devices used or entering into the construction of plumbing and drainage systems, or parts thereof shall be marked and identified in a manner satisfactory to the Authority Having Jurisdiction. Such marking shall be done by the manufacturer. Field markings shall not be acceptable.

Exception: Markings shall not be required on nipples created from cutting and threading of approved pipe.

301.2.2 Standards. Standards listed or referred to in this chapter or other chapters cover materials that will conform to the requirements of this code, where used in accordance with the limitations imposed in this or other chapters thereof and their listing. Where a standard covers materials of various grades, weights, quality, or configurations, the portion of the listed standard that is applicable shall be used. Design and materials for special conditions or materials not provided for herein shall be permitted to be used by special permission of the Authority Having Jurisdiction after the Authority Having Jurisdiction has been satisfied as to their adequacy. A list of plumbing standards that appear in specific sections of this code is referenced in Table 1701.1. Standards referenced in Table 1701.1 shall be applied as indicated in the applicable referenced section. A list of additional approved standards, publications, practices, and guides that are not referenced in specific sections of this code appear in Table 1701.2. An IAPMO Installation Standard is referenced in Appendix I for the convenience of the users of this code. It is not considered as a part of this code unless formally adopted as such by the Authority Having Jurisdiction.

301.2.3 Plastic Pipe, Plastic Pipe Fittings, and Components. Plastic pipe, plastic pipe fittings, and components other than those for gas shall comply with NSF/ANSI 14.

301.2.4 Cast-Iron Soil Pipe, Fittings, and Hubless Couplings. Cast-iron soil pipe, fittings, and hubless couplings shall be third party certified in accordance with ASTM C1277 and CISPI 310 for couplings and ASTM A888, ASTM A74, and CISPI 301 for pipes and fittings. 301.2.5 Existing Buildings. In existing buildings or premises in which plumbing installations are to be altered, repaired, or renovated, the Authority Having Jurisdiction has discretionary powers to permit deviation from the provisions of this code, provided that such proposal to deviate is first submitted for proper determination in order that health and safety requirements, as they pertain to plumbing, shall be observed.

CPC § 1701.2 Medium relevance — show source text

1|X|X|X|X||||X||X|X|X|X|X|X|||||||||| |Table 1701.2||X||X|||||||||||||||||||||

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 333

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

334 2025 CALIFORNIA PLUMBING CODE

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

CHAPTER 17

REFERENCED STANDARDS

1701.0 General.

1701.1 Standards. The standards listed in Table 1701.1 are

referenced in various sections of this code and shall be con sidered part of the requirements of this document. The standards are listed herein by the standard number and effective

date, the title, application and the section(s) of this code that references the standard. The application of the referenced standard(s) shall be as specified in Section 301.2.2. The promulgating agency acronyms referred to in Table 1701.1 are defined in a list found at the end of the tables.

TABLE 1701.1

Col1	REFERENCED STANDARDS	Col3	Col4
STANDARD NUMBER	STANDARD TITLE	APPLICATION	REFERENCED SECTION
AAMI	AAMI	AAMI	AAMI
ANSI/AAMI/ISO 23500-2	Preparation and Quality Management of Fluids for Haemodialysis and Related Therapies—Part 2: Water Treat- ment Equipment for Hemodialysis Applications	Miscellaneous	614.7
ANSI/AAMI/ISO 23500-3	Preparation and Quality Management of Fluids for Haemodialysis and Related Therapies—Part 3: Water for Haemodialysis and Related Therapies.	Miscellaneous	614.7
ARCSA	ARCSA	ARCSA	ARCSA
ARCSA/ASPE/ANSI 63- 2020	Rainwater Catchment Systems	Miscellaneous	1602.1
ASME	ASME	ASME	ASME
ASME A112.1.2-2012 (R2017)	Air Gaps in Plumbing Systems (For Plumbing Fixtures and Water-Connected Receptors)	Fittings	Table 603.2
ASME A112.1.3-2000 (R2019)	Air Gap Fittings for Use with Plumbing Fixtures, Appliances, and Appurtenances	Fittings	Table 603.2
ASME A112.3.1-2007 (R2017)	Stainless Steel Drainage Systems for Sanitary DWV, Storm, and Vacuum Applications,

CPC § 723-2018 Medium relevance — show source text
UL 723-2018 (R2023) Standard for Safety Test for Surface Burning Characteristics of Building Materials

UL 727-2018 Standard for Safety Oil-Fired Central Furnaces

UL 731-2018 (R2021) Standard for Safety Oil-Fired Unit Heaters

UL 1077-2015 (R2021) Standard for Safety Supplementary Protectors for Use in Electrical Equipment

UL 1574-2004 (R2023) Standard for Safety Track Lighting Systems

UL 1598-2021 Standard for Safety Luminaires

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ANSI/NFRC 400-2023

Available from:

Procedure for Determining Fenestration Product Air Leakage

National Fenestration Rating Council 6035 Ivy Lane, Suite 140 Greenbelt, MD 20770 (301) 589-1776 www.NFRC.org Email: info@nfrc.org

STANDARDS AND DOCUMENTS REFERENCED IN THE ENERGY CODE

UL 1741-2021 Standard for Safety Inverters, Converters, Controllers and Interconnection System Equipment for Use With Distributed Energy Resources

ANSI/CAN/UL 1973-2022 Standard for Safety Batteries for Use in Stationary and Motive Auxiliary Power Applications

UL 2108-2015 (R2023) Standard for Safety Low Voltage Lighting Systems

UL 8750-2015 (R2022) Standard for Safety Light Emitting Diode (LED) Equipment for Use in Lighting Products

ANSI/CAN/UL 9540-2023 Standard for Safety Energy Storage Systems and Equipment

Available from: UL LLC 333 Pfingsten Road Northbrook, IL 60062-2096 (847) 272-8800

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1-B ENERGY COMMISSION DOCUMENTS

INCORPORATED BY REFERENCE IN THEIR ENTIRETY

The following documents published by the California Energy Commission are incorporated by reference in their entirety into the Energy Code.

Referenced appendices for the Building Energy Efficiency Standards for Residential and Nonresidential Buildings, including the Joint Appendices (JA), the Residential Appendices (RA), and Nonresidential Appendices (NA)

Available from: California Energy Commission/Publications 715 P Street Sacramento, CA 95814 (916) 654-5200 (800) 772-3300 (in California) www.energy.ca.gov/title24

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CPC § 0.63 Medium relevance — show source text
For shear loads of normal or permanent load duration as defined by the ANSI/AWC NDS, the values in the table shall be multiplied by 0.63 or 0.56, respectively.
g. For Case 1 through 6 descriptions see Figure 2306.2(1).|For SI: 1 inch = 25.4 mm, 1 pound per foot = 14.5939 N/m.
a. For framing of other species: (1) Find specific gravity for species of lumber in ANSI/AWC NDS. (2) For staples find shear value from table for Structural I panels (regardless of
actual grade) and multiply value by 0.82 for species with specific gravity of 0.42 or greater, or 0.65 for all other species.
b. Space fasteners maximum 12 inches on center along intermediate framing members (6 inches on center where supports are spaced 48 inches on center).
c. Framing at adjoining panel edges shall be 3 inches nominal or wider.
d. Staples shall have a minimum crown width of7/16 inch and shall be installed with their crowns parallel to the long dimension of the framing members.
e. The minimum nominal width of framing members not located at boundaries or adjoining panel edges shall be 2 inches.
f. For shear loads of normal or permanent load duration as defined by the ANSI/AWC NDS, the values in the table shall be multiplied by 0.63 or 0.56, respectively.
g. For Case 1 through 6 descriptions see Figure 2306.2(1).|For SI: 1 inch = 25.4 mm, 1 pound per foot = 14.5939 N/m.
a. For framing of other species: (1) Find specific gravity for species of lumber in ANSI/AWC NDS. (2) For staples find shear value from table for Structural I panels (regardless of
actual grade) and multiply value by 0.82 for species with specific gravity of 0.42 or greater, or 0.65 for all other species.
b. Space fasteners maximum 12 inches on center along intermediate framing members (6 inches on center where supports are spaced 48 inches on center).
c. Framing at adjoining panel edges shall be 3 inches nominal or wider.
d. Staples shall have a minimum crown width of7/16 inch and shall be installed with their crowns parallel to the long dimension of the framing members.
e. The minimum nominal width of framing members not located at boundaries or adjoining panel edges shall be 2 inches.
f. For shear loads of normal or permanent load duration as defined by the ANSI/AWC NDS, the values in the table shall be multiplied by 0.63 or 0.56, respectively.
g. For Case 1 through 6 descriptions see Figure 2306.2(1).|For SI: 1 inch = 25.4 mm, 1 pound per foot = 14.5939 N/m.
a. For framing of other species: (1) Find specific gravity for species of lumber in ANSI/AWC NDS. (2) For staples find shear value from table for Structural I panels (regardless of
actual grade) and multiply value by 0.82 for species with specific gravity of 0.42 or greater, or 0.65 for all other species.
b. Space fasteners maximum 12 inches on center along intermediate framing members (6 inches on center where supports are spaced 48 inches on center).
c.
CPC § 1005.0 Medium relevance — show source text
1005.0 Safety or Relief Valve Discharge . . 219

1005.1 General. . . . . . . . . . . . . . . . . . . . . 219

1005.2 Discharge Piping . . . . . . . . . . . . . 219

1005.3 Splash Shield . . . . . . . . . . . . . . . . 219

1005.4 Hazardous Discharge . . . . . . . . . . 219

1005.5 Vacuum Relief Valve . . . . . . . . . . 219

1006.0 Shutoff Valves . . . . . . . . . . . . . . . 219

1006.1 General. . . . . . . . . . . . . . . . . . . . . 219

1007.0 Gas-Pressure Regulators . . . . . . . 219

1007.1 General. . . . . . . . . . . . . . . . . . . . . 219

1008.0 Low-Water Cutoff . . . . . . . . . . . . . 220

1008.1 General. . . . . . . . . . . . . . . . . . . . . 220

1009.0 Combustion Regulators Safety Valves . . . . . . . . . . . . . . . . 220

1009.1 General. . . . . . . . . . . . . . . . . . . . . 220

1010.0 Clearance for Access . . . . . . . . . . 220

1010.1 General. . . . . . . . . . . . . . . . . . . . . 220

1010.2 Power Boilers . . . . . . . . . . . . . . . . 220

1010.3 Steam-Heating Boilers, Hot Water Boilers, and Power Boilers. . 220

1010.4 Package Boilers, Steam-Heating Boilers, and Hot-Water-Heating Boilers. . . . . . . . . . . . . . . . . . . . . . 220

1011.0 Boilers, Stokers, and Steam

Generators . . . . . . . . . . . . . . . . . . 220

xxxviii

1011.1 General. . . . . . . . . . . . . . . . . . . . . 220

1012.0 Operating Adjustments and Instructions . . . . . . . . . . . . . . . . . . 220

1012.1 General. . . . . . . . . . . . . . . . . . . . . 220

1013.0 Inspections and Tests. . . . . . . . . . 220

1013.1 General. . . . . . . . . . . . . . . . . . . . . 220

1013.2 Operating Permit . . . . . . . . . . . . . 221

1013.3 Maintenance Inspection . . . . . . . . 221

1013.4 Power and Miniature Boilers. . . . . 221

1013.5 Steam-Heating and WaterHeating Boilers . . . . . . . . . . . . . . . 221
CPC § 0.79 Medium relevance — show source text
= the molar flow rate of oxygen in the exhaust duct.

The concentrations of oxygen and carbon dioxide in the analyzers are given by

X o 2 = M ---------------------------------------- 0 N 2 + MM oo 22 + M co 2

X co 2 = M ---------------------------------------- 0 N 2 + MM coo 2 2 + M co 2

(3)

(4)

where:

0 M N 2 [= the molar flow rate of nitrogen into the system.]

M co 2 = the molar flow rate of carbon dioxide in the exhaust duct.

It is assumed that all the water is trapped out and that the only gases passing through the analyzers are nitrogen, oxygen and carbon dioxide.

Combining Equations 3 and 4 to get

M co 2 = X ---------------- co X 2 o M 2 o - 2

and noting that

0 X 0 o 2 = -------------------------- M 0 N M 2 + o M 2 0 o - 2

Equation 3 can be solved for M o 2,

0 0 M o 2 = ----------------------------------------------------- M o 2 [1( X – o X 2 X o ⁄ 2 – o X 2 ) co – 2 X o 2 ] -

which, when substituted into Equation 2, yields

0 φ = ---------------------------------------------------------- 0 X o 2 – X o 2 ⁄ (1 – X co 2 )

X o 2 [1 – X o 2 ⁄ (1 – X co 2 ) ]

(5)

(6)

The volumetric flow rate in the exhaust duct is given by

V S = (1 – φ) V A + φ V A (7)

where:

V S = referred to standard conditions 68°F.

V A = referred to standard conditions 68°F.

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CALCULATION OF THE TOTAL RATE OF HEAT AND CARBON MONOXIDE OR CARBON DIOXIDE PRODUCTION

= the expansion factor, due to chemical reaction, of the air that is depleted of its oxygen.

0 0 = X N 2 + bX o 2 = 0.79 + 0.21 b (8)

where b is the ratio of the moles of combustion products formed to the moles of oxygen consumed. The value of ranges from 1.000 for carbon to 1.175 for cellulose with the plastics having values in between. In order to reduce the error incurred when unknown products are burning is taken to have an intermediate value of 1.084 which is exact for propane, the burner gas.

From Equation 7, the volumetric flow rate of air entering the system is

CPC § 705.10 Medium relevance — show source text

Waste,
and Vent (DWV), Sewer, Sanitary, and Storm Plumbing Sys-
tems for Above and Below Ground Use|Joints|705.10|

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REFERENCED STANDARDS

TABLE 1701.1 (continued) REFERENCED STANDARDS

STANDARD NUMBER	STANDARD TITLE	APPLICATION	REFERENCED SECTION
ASTM C1540-2020	Standard Specification for Heavy-Duty Shielded Couplings Joining Hubless Cast Iron Soil Pipe and Fittings	Joints	705.2.2
ASTM C1563-2008 (R2021)	Standard Test Method for Gaskets for Use in Connection with Hub and Spigot Cast Iron Soil Pipe and Fittings for Sanitary Drain, Waste, Vent, and Storm Piping Applications	Joints	705.2.2
ASTM C1822-2021	Standard Specification for Insulating Covers on Accessible Lavatory Piping	Miscellaneous	403.3
ASTM D1253-2014	Standard Test Method for Residual Chlorine in Water	Miscellaneous	1506.10.6, 1603.4.1
ASTM D1785-2021a	Standard Specification for Poly (Vinyl Chloride) (PVC) Plastic Pipe, Schedules 40, 80, and 120	Piping	Table 604.1, Table 701.2
ASTM D2235-2021	Standard Specification for Solvent Cement for Acrylonitrile- Butadiene-Styrene (ABS) Plastic Pipe and Fittings	Joints	705.1.2
ASTM D2239-2021	Standard Specification for Polyethylene (PE) Plastic Pipe (SIDR-PR) Based on Controlled Inside Diameter	Piping	Table 604.1
ASTM D2241-2020	Standard Specification for Poly (Vinyl Chloride) (PVC) Pressure- Rated Pipe (SDR Series)	Piping	Table 604.1
ASTM D2464-2015	Standard Specification for Threaded Poly (Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 80	Fittings	Table 604.1
ASTM D2466-2021	Standard Specification for Poly (Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40	Fittings	Table 604.1
ASTM D2467-2020	Standard Specification for Poly (Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 80	Fittings	Table 604.1
ASTM D2513-2020	Standard Specification for Polyethylene (PE) Gas Pressure Pipe, Tubing, and Fittings	Piping	1208.5.4, 1208.5.6.2, 1208.5.10.2, 1210.1.7.1(1)
ASTM D2564-2020	Standard Specification for Solvent Cements for Poly (Vinyl Chloride) (PVC) Plastic Piping Systems	Joints	605.12.2, 705.6.

CBC § 2025 Medium relevance — show source text
CHAPTER C1 GABLE END RETROFIT FOR

HIGH-WIND AREAS . . . . . . . . . . . . . . . . . . . . . . APPENDIX C-3

C101 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX C-3

C102 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX C-3

C103 Materials of Construction . . . . . . . . . . . . . APPENDIX C-4

C104 Retrofitting Gable End Walls to Enhance Wind Resistance . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX C-5

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CONTENTS

CHAPTER C2 ROOF DECK FASTENING FOR

HIGH-WIND AREAS . . . . . . . . . . . . . . . . . . . . . APPENDIX C-27

C201 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX C-27

C202 Roof Deck Attachment for

Wood Roofs. . . . . . . . . . . . . . . . . . . . . . . APPENDIX C-27

CHAPTER C3 REFERENCED STANDARDS . . . . APPENDIX C-31

C301 Referenced Standards . . . . . . . . . . . . . . . APPENDIX C-31

APPENDIX D BOARD OF APPEALS . . . . . . . . . . . APPENDIX D-3

D101 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX D-3

APPENDIX E TEMPORARY EMERGENCY

USES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX E-3

E101 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX E-3

E102 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX E-3

E103 Submittal Documents . . . . . . . . . . . . . . . . APPENDIX E-3

E104 Conformance . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX E-3

E105 Permits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX E-3

E106 General Standards for

Emergency Uses. . . . . . . . . . . . . . . . . . . . APPENDIX E-3

E107 Use of Specific Standards . . . . . . . . . . . . . APPENDIX E-4
California Plumbing Code Medium relevance — show source text
BK103 Materials, Mixing and Installation . . . . . APPENDIX BK-4

BK104 Finishes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX BK-5

BK105 Cob Walls—General. . . . . . . . . . . . . . . . . . APPENDIX BK-6

CONTENTS

BK106 Cob Walls—Structural . . . . . . . . . . . . . . . . APPENDIX BK-8

BK107 Cob Floors. . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX BK-18

BK108 Fire Resistance. . . . . . . . . . . . . . . . . . . . . . APPENDIX BK-18

BK109 Thermal Performance. . . . . . . . . . . . . . . APPENDIX BK-18

BK110 Referenced Standards . . . . . . . . . . . . . . APPENDIX BK-18

APPENDIX BL HEMP-LIME (HEMPCRETE)

CONSTRUCTION . . . . . . . . . . . . . APPENDIX BL-3

BL101 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .APPENDIX BL-3

BL102 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . .APPENDIX BL-3

BL103 Hemp-Lime Construction . . . . . . . . . . . . .APPENDIX BL-4

BL104 Finishes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .APPENDIX BL-9

BL105 Fire Resistance. . . . . . . . . . . . . . . . . . . . . . APPENDIX BL-10

BL106 Thermal Performance. . . . . . . . . . . . . . . APPENDIX BL-10

BL107 Mechanical Performance . . . . . . . . . . . . APPENDIX BL-11

BL108 Referenced Standards . . . . . . . . . . . . . . APPENDIX BL-11

APPENDIX BM 3D-PRINTED BUILDING

CONSTRUCTION . . . . . . . . . . . . APPENDIX BM-3

BM101 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .APPENDIX BM-3

BM102 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . .APPENDIX BM-3

BM103 Building Design . . . . . . . . . . . . . . . . . . . . . .APPENDIX BM-3

BM104 Building Construction. . . . . . . . . . . . . . . .APPENDIX BM-3

BM105 Special Inspections . . . . . . . . . . . . . . . . . .APPENDIX BM-3

BM106 Referenced Standards . . . . . . . . . . . . . . .APPENDIX BM-4

APPENDIX BN EXTENDED PLATE WALL
California Plumbing Code Medium relevance — show source text
A205 General Requirements . . . . . . . . . . . . . . . APPENDIX A-21

A206 Analysis and Design. . . . . . . . . . . . . . . . . . APPENDIX A-22

A207 Materials of Construction . . . . . . . . . . . . APPENDIX A-23

CHAPTER A3 PRESCRIPTIVE PROVISIONS FOR SEISMIC

STRENGTHENING OF CRIPPLE WALLS AND SILL PLATE

ANCHORAGE OF LIGHT, WOOD-FRAME RESIDENTIAL BUILDINGS. . . . . . . . . . . . . . . . APPENDIX A-27

A301 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX A-27

A302 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX A-27

A303 Structural Weaknesses. . . . . . . . . . . . . . . APPENDIX A-28

A304 Strengthening Requirements . . . . . . . . . APPENDIX A-28

CHAPTER A4 EARTHQUAKE RISK REDUCTION IN WOOD-FRAME RESIDENTIAL BUILDINGS WITH

SOFT, WEAK OR OPEN FRONT WALLS . . . . . APPENDIX A-45

A401 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX A-45

A402 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX A-45

A403 Analysis and Design. . . . . . . . . . . . . . . . . . APPENDIX A-45

A404 Prescriptive Measures for Weak Story. . APPENDIX A-47

A405 Materials of Construction . . . . . . . . . . . . APPENDIX A-48

A406 Construction Documents. . . . . . . . . . . . . APPENDIX A-48

A407 Quality Control. . . . . . . . . . . . . . . . . . . . . . APPENDIX A-49

CHAPTER A5 REFERENCED STANDARDS . . . . APPENDIX A-53

A501 Referenced Standards . . . . . . . . . . . . . . . APPENDIX A-53

APPENDIX B SUPPLEMENTARY ACCESSIBILITY

REQUIREMENTS FOR EXISTING BUILDINGS

AND FACILITIES. . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX B-3

B101 Qualified Historic Buildings and Facilities. . . . . . . . . . . . . . . . . . . . . . . APPENDIX B-3

B102 Fixed Transportation Facilities and Stations . . . . . . . . . . . . . . . . . . . . . . . APPENDIX B-3

B103 Dwelling Units and Sleeping Units. . . . . . APPENDIX B-4

B104 Referenced Standards . . . . . . . . . . . . . . . . APPENDIX B-4

APPENDIX C GUIDELINES FOR THE WIND RETROFIT
CPC § 12-4 Medium relevance — show source text
ground
snow load|Redwoodf
Western cedarsf
Ponderosa pinef
Red pinef|2 × 10|12-4|11-0|9-0|1-0|1-6|2-0|2-6|2-6|NP|NP|NP| |70 ground
snow load|Redwoodf
Western cedarsf
Ponderosa pinef
Red pinef|2 × 12|14-9|12-9|10-5|1-0|1-6|2-0|2-6|3-0|3-0|NP|NP| |For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa, 1 pound = 0.454 kg.
NP = Not Permitted.
a. Dead load = 10 psf. Snow load not assumed to be concurrent with live load.
b. No. 2 grade, wet service factor included.
c.L/Δ = 360 at main span.
d.L/Δ = 180 at cantilever with a 220-pound point load applied to end.
e. Includes incising factor.
f. Incising factor not included.
g. Interpolation allowed. Extrapolation is not allowed.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa, 1 pound = 0.454 kg.
NP = Not Permitted.
a. Dead load = 10 psf. Snow load not assumed to be concurrent with live load.
b. No. 2 grade, wet service factor included.
c.L/Δ = 360 at main span.
d.L/Δ = 180 at cantilever with a 220-pound point load applied to end.
e. Includes incising factor.
f. Incising factor not included.
g. Interpolation allowed. Extrapolation is not allowed.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa, 1 pound = 0.454 kg.
NP = Not Permitted.
a. Dead load = 10 psf. Snow load not assumed to be concurrent with live load.
b. No. 2 grade, wet service factor included.
c.L/Δ = 360 at main span.
d.L/Δ = 180 at cantilever with a 220-pound point load applied to end.
e. Includes incising factor.
f. Incising factor not included.
g. Interpolation allowed. Extrapolation is not allowed.|For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa, 1 pound = 0.454 kg.
NP = Not Permitted.
a. Dead load = 10 psf. Snow load not assumed to be concurrent with live load.
b. No. 2 grade, wet service factor included.
c.L/Δ = 360 at main span.
d.L/Δ = 180 at cantilever with a 220-pound point load applied to end.
e.
CPC § 2202.4.2 Medium relevance — show source text
2202.4.2 Modifications to AISC 358 Chapter 11 Welded Moment Connection. The welded sideplate steel moment connection shall be permitted, provided: 1. The beams shall consist of either rolled or built-up wide flange sections. 2. The biaxial dual-strong axis and column minor axis configurations of the moment connection shall be considered as an alternative system. 3. For SMF and IMF systems, U-shaped cover plates shall be used and the hinge-to-hinge span to beam depth, L h /d, shall be greater than or equal to 5. 4. The width-to-thickness ratios for beam flanges shall not be less than 3. 5. The spacing for lateral bracing of wide flange beams, L b , shall include the length of the side plate at beam ends. 6. The extension of the side plates beyond the face of the column shall be within the range of 0.77d to 1.0d. 7. The gap-to-side plate thickness ratio shall range from 2.1 to 2.3. Exception: The gap-to-side plate thickness ratio shall be permitted to be modified for moment connections with unequal beam sizes on opposite sides of the column or when orthogonal beams acting as drag connections frame into the side plate. 8. Demand critical fillet welds {2}, {5}, {5a} and {7} shall have Magnetic Particle Testing (MT) in accordance with AWS D1.1 for procedure, technique and acceptance. Inspect the beginning and end of these welds for a 6-inch length, plus any location along the length of the weld where a start and restart is visually noted for a distance of 6 inches on either side of the start/stop location.

2202.4.3 Modifications to AISC 358 Chapter 11 Bolted Moment Connection The bolted sideplate steel moment connection shall be permitted, provided: 1. The beams shall consist of either rolled or built-up wide flange sections. Columns shall consist of rolled or built-up wide flange sections or noncomposite built-up box or HSS with a minimum wall thickness of [3] / 4 inch (19 mm), or satisfy the requirements of width-to-thickness ratios of highly ductile members in AISC 341-16. 2. The biaxial dual-strong axis and column minor axis configurations of the moment connection shall be considered as an alternative system. 3. For SMF and IMF systems, on the sideplate standard or configuration A the U-shaped cover plates shall be used with the k dimension extension. The k dimension extension length is defined as beam depth d b /6, rounded to the nearest [1] / 2 inch (12.7 mm).
California Plumbing Code Medium relevance — show source text
BJ102 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . .APPENDIX BJ-4

BJ103 Bales. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .APPENDIX BJ-5

BJ104 Finishes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .APPENDIX BJ-6

BJ105 Strawbale Walls—General. . . . . . . . . . . . .APPENDIX BJ-7

BJ106 Strawbale Walls—Structural. . . . . . . . . .APPENDIX BJ-11

BJ107 Fire Resistance . . . . . . . . . . . . . . . . . . . . . .APPENDIX BJ-17

BJ108 Thermal Insulation . . . . . . . . . . . . . . . . . .APPENDIX BJ-17

BJ109 Referenced Standards . . . . . . . . . . . . . . .APPENDIX BJ-17

APPENDIX BK COB CONSTRUCTION (MONOLITHIC ADOBE) . . . . . . . . . . . . . . . . . . . . APPENDIX BK-3

BK101 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX BK-3

BK102 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX BK-4

BK103 Materials, Mixing and Installation . . . . . APPENDIX BK-4

BK104 Finishes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX BK-5

BK105 Cob Walls—General. . . . . . . . . . . . . . . . . . APPENDIX BK-6

CONTENTS

BK106 Cob Walls—Structural . . . . . . . . . . . . . . . . APPENDIX BK-8

BK107 Cob Floors. . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX BK-18

BK108 Fire Resistance. . . . . . . . . . . . . . . . . . . . . . APPENDIX BK-18

BK109 Thermal Performance. . . . . . . . . . . . . . . APPENDIX BK-18

BK110 Referenced Standards . . . . . . . . . . . . . . APPENDIX BK-18

APPENDIX BL HEMP-LIME (HEMPCRETE)

CONSTRUCTION . . . . . . . . . . . . . APPENDIX BL-3

BL101 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .APPENDIX BL-3

BL102 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . .APPENDIX BL-3

BL103 Hemp-Lime Construction . . . . . . . . . . . . .APPENDIX BL-4
California Plumbing Code Medium relevance — show source text
BL104 Finishes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .APPENDIX BL-9

BL105 Fire Resistance. . . . . . . . . . . . . . . . . . . . . . APPENDIX BL-10

BL106 Thermal Performance. . . . . . . . . . . . . . . APPENDIX BL-10

BL107 Mechanical Performance . . . . . . . . . . . . APPENDIX BL-11

BL108 Referenced Standards . . . . . . . . . . . . . . APPENDIX BL-11

APPENDIX BM 3D-PRINTED BUILDING

CONSTRUCTION . . . . . . . . . . . . APPENDIX BM-3

BM101 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .APPENDIX BM-3

BM102 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . .APPENDIX BM-3

BM103 Building Design . . . . . . . . . . . . . . . . . . . . . .APPENDIX BM-3

BM104 Building Construction. . . . . . . . . . . . . . . .APPENDIX BM-3

BM105 Special Inspections . . . . . . . . . . . . . . . . . .APPENDIX BM-3

BM106 Referenced Standards . . . . . . . . . . . . . . .APPENDIX BM-4

APPENDIX BN EXTENDED PLATE WALL

CONSTRUCTION . . . . . . . . . . . . .APPENDIX BN-3

BN101 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX BN-3

BN102 Construction Requirements . . . . . . . . . . APPENDIX BN-3

APPENDIX BO EXISTING BUILDINGS AND

STRUCTURES. . . . . . . . . . . . . . . .APPENDIX BO-3

BO101 Purpose and Intent . . . . . . . . . . . . . . . . . . APPENDIX BO-3

BO102 Compliance . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX BO-3

BO103 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX BO-3

BO104 Repairs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX BO-4

BO105 Alterations . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX BO-4

BO106 Addition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX BO-6

BO107 Relocated Buildings. . . . . . . . . . . . . . . . . . APPENDIX BO-6

BO108 Referenced Standards . . . . . . . . . . . . . . . APPENDIX BO-6
CPC § 0.79 Medium relevance — show source text
(15)

where:

M CO and M A = the molar flow rates of carbon dioxide in the duct and of the air into the system including that flowing into the room and that entering the exhaust duct directly.

64 2025 CALIFORNIA REFERENCED STANDARDS CODE

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

CALCULATION OF THE TOTAL RATE OF HEAT AND CARBON MONOXIDE OR CARBON DIOXIDE PRODUCTION

The ratio of the CO and O 2 concentration in the duct are the same as in the analyzer so that

M ------- co - = ------- X co M o 2 X o 2

(16)

When CO is present in the sampling line, Equation 5 becomes

0 M o 2 = M 0 o 2 -----------------------------------------------1 –( XX oo 22 X ⁄ – o X 2 co ) – 2 X – o 2 X co -

(17)

Equation 14 is obtained by combining equations 15, 16 and 17, letting

0 1 – X o 2 = 0.79, and letting

V A = -------------------------1 – 0.084 V s φ

When CO is not measured, but is removed from the sample line and CO is measured, φ and Q - are calculated as follows

0 φ = ------------------------------------------------- X o 2 0 – ( X o 2 1⁄ – X co )

X o 2 ( X o 2 1 – X co )

Q

= [φ - (( E ″ - E ′ )/ E ′ )((1 - φ)/2)( X co X o 2 )]

(18)

(19)

(20)

E ′ X o 2 V A MW ( )

where:

E ″ = 23.4 MJ/m [3]

E ′ = 17.4 MJ/m [3]

V A = m [3] /sec. referred to a 68°F base. Thus, Q - becomes
```
        _Q_ = [φ       - 0.345((1       - φ)2)/( _X_ _co_ / _X_ _o_ 2 )]
```
Q

Q

0 17.4 X o V 2 A MW ( )

When Equations 18 through 20 are used to calculate the rate of heat release, Q -, the carbon dioxide must be removed from the sample streams flowing through the oxygen and carbon monoxide analyzers. The removal of carbon dioxide can be accomplished by passing the sample stream through a filter of either ascarite or an aqueous solution of sodium hydroxide.

2025 CALIFORNIA REFERENCED STANDARDS CODE 65

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

66 2025 CALIFORNIA REFERENCED STANDARDS CODE
California Plumbing Code Medium relevance — show source text
BH101 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX BH-3

BH102 Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX BH-3

BH103 Automatic Vehicular Gates . . . . . . . . . . . APPENDIX BH-3

BH104 Referenced Standards . . . . . . . . . . . . . . . APPENDIX BH-3

APPENDIX BI LIGHT STRAW-CLAY

CONSTRUCTION . . . . . . . . . . . . . APPENDIX BI-3

BI101 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX BI-3

BI102 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX BI-3

BI103 Nonbearing Light Straw-Clay Construction . . . . . . . . . . . . . . . . . . . . . . . APPENDIX BI-3

BI104 Thermal Performance. . . . . . . . . . . . . . . . . APPENDIX BI-6

BI105 Referenced Standards . . . . . . . . . . . . . . . . APPENDIX BI-7

APPENDIX BJ STRAWBALE CONSTRUCTION . .APPENDIX BJ-3

BJ101 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .APPENDIX BJ-3

BJ102 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . .APPENDIX BJ-4

BJ103 Bales. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .APPENDIX BJ-5

BJ104 Finishes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .APPENDIX BJ-6

BJ105 Strawbale Walls—General. . . . . . . . . . . . .APPENDIX BJ-7

BJ106 Strawbale Walls—Structural. . . . . . . . . .APPENDIX BJ-11

BJ107 Fire Resistance . . . . . . . . . . . . . . . . . . . . . .APPENDIX BJ-17

BJ108 Thermal Insulation . . . . . . . . . . . . . . . . . .APPENDIX BJ-17

BJ109 Referenced Standards . . . . . . . . . . . . . . .APPENDIX BJ-17

APPENDIX BK COB CONSTRUCTION (MONOLITHIC ADOBE) . . . . . . . . . . . . . . . . . . . . APPENDIX BK-3

BK101 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX BK-3

BK102 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . APPENDIX BK-4
California Plumbing Code Medium relevance — show source text
|66|200|1|103||905|36|780||613| |0:55|1|681|74|220|1|237||916|41|230||687| |1:00|1|700|82|330|1|372||927|45|740||762| |1:05|1|718|90|540|1|509||937|50|300||838| |1:10|1|735|98|830|1|647||946|54|910||915| |1:15|1|750|107|200|1|787||955|59|560||993| |1:20|1|765|115|650|1|928||963|64|250||071| |1:25|1|779|124|180|2|070||971|68|990|1|150| |1:30|1|792|132|760|2|213||978|73|760|1|229| |1:35|1|804|141|420|2|357||985|78|560|1|309| |1:40|1|815|150|120|2|502||991|83|400|1|390| |1:45|1|826|158|890|2|648||996|88|280|1|471| |1:50|1|835|167|700|2|795|1|001|93|170|1|553| |1:55|1|843|176|550|2|942|1|006|98|080|1|635| |2:00|1|850|185|440|2|091|1|010|103|020|1|717| |2:10|1|862|203|330|3|389|1|017|112|960|1|882| |2:20|1|875|221|330|3|689|1|024|122|960|2|049| |2:30|1|888|239|400|3|991|1|031|133|040|2|217| |2:

Frequently asked questions

Why didn’t you cite § 220.0 and § 221.0?

I could not find § 220.0 or § 221.0 in the provided CPC files. The governing text about referenced standards appears in § 301.2 and § 1701.1 (Chapter 17).

If a standard is updated, which edition controls?

Use the edition/effective date shown in Table 1701.1 for the specific referenced standard cited by the CPC section — always confirm the edition listed in Chapter 17.

Can I field‑mark a product if it lacks the required marking?

No — § 301.2.1 requires manufacturer marking per the referenced standard; field markings are generally not acceptable (the pipe nipple exception is narrow).

What if a standard lists many product options?

Select and apply only the portion of the referenced standard that the CPC section requires — do not assume all options in a standard are adopted. § 301.2.2 requires using the portion applicable to the CPC limitation.

Who can approve an unlisted product or alternate material?

The Authority Having Jurisdiction (AHJ) can permit deviations or accept materials not otherwise provided for in the CPC after review and demonstration of adequacy (§ 301.2.2).

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California Plumbing Code