CPC · California Plumbing Code

Plumbing Fixtures and Fixture Fittings

CPC Chapter 4 sets the material, installation, water‑conservation, accessibility, and minimum‑fixture requirements for plumbing fixtures and fittings.

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Last reviewed: July 6, 2026

Overview

This hub covers CPC Chapter 4 — the rules that govern plumbing fixtures (toilets, lavatories, sinks, bathtubs, floor and service sinks, etc.), their fixture fittings (supply and waste fittings, faucets, valves), and the minimum number and quality of fixtures required for different occupancies. The chapter’s scope and applicability are set out in § 401.1 and the general quality and water‑conservation requirements are in § 401.2–§ 401.3, which frame materials, referenced standards, and mandatory water‑saving provisions .

You’ll consult this part of the CPC whenever you select fixtures, confirm installation details, or demonstrate compliance with water‑use and accessibility rules. The code ties fixture water‑use limits to CALGreen and referenced standards (WaterSense, ASME/CSA fixture standards), so fixture selection affects code compliance and building approvals .

Key topics and sections to watch in Chapter 4 include installation and supply‑fitting requirements (§ 402.0 series, including § 402.7 on supply fittings and § 402.10 on access to slip‑joint connections), accessibility and exposed‑pipe protections (§ 403.0–§ 403.3), waste fittings and overflows (§ 404.1–§ 404.2), prohibited fixtures (§ 405.0), and minimum fixture counts and occupant‑load tables (see § 422.1 and associated tables) .

In this section

Code references

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

California Plumbing Code High relevance — show source text
Chapter 1 Administration.

Chapter 1 regulates the application, enforcement, and administration of subsequent requirements of the code. As well as establishing the scope of the code, this chapter is concerned with enforcing the requirements contained in the body of the code. A plumbing code, as with any other code, is intended to be adopted as a legally enforceable document to safeguard health, safety, property, and public welfare. The code cannot be effective without satisfactory provisions for its administration and enforcement. The Authority Having Jurisdiction is to review the proposed and completed work and to decide whether a plumbing system conforms to the code requirements. As a public servant, the Authority Having Jurisdiction enforces the code in an unbiased, proper manner. The design professional is responsible for the design of a safe plumbing system. The contractor is responsible for installing the system in accordance with the plans.

Chapter 2 Definitions.

To maintain consistency and encourage the use of common terminology, Chapter 2 establishes definitions to provide clarity of terms and promote the use of a common language throughout the code. Understanding definitions within the context of their application enables greater collaboration, efficiency, standardization, and interpretation in applying and enforcing terms used throughout the code. Codes are technical documents, and every term can impact the meaning of the code text. Terms not defined have a normally accepted meaning.

Chapter 3 General Regulations.

Chapter 3 regulates the general requirements, not specific to other chapters, for installing plumbing systems. Many regulations are not specific plumbing requirements but relate to the overall plumbing system. This chapter contains safety requirements for installing plumbing and also contains nonplumbing requirements for identifying pipes, pipe fittings, traps, fixtures, materials, and devices used in plumbing systems. Listing method of approval, based on applicable nationally recognized standards, for the safe and proper installation of plumbing systems, is essential to ensure the protection of public health, safety, and welfare. The safety requirements provide protection for piping, material, and structures, with provisions for installation practices, removing stress and strain of the pipe, sleeving, and hanger support. The building’s structural stability is protected by the regulations for cutting and notching of structural members.

Chapter 4 Plumbing Fixtures and Fixture Fittings.

This chapter regulates the minimum number of plumbing fixtures of a specific type and quality for each building. The fixtures must be properly installed to be usable by the individuals occupying the building. The quality and design of every fixture must conform to the applicable referenced standard. Compliance with this chapter will result in a building or structure having acceptable plumbing fixtures for the sanitary, hygienic, cleaning, washing, and food preparation needs of the occupants. In addition to ensuring resilient fixtures, the chapter also takes into consideration gender-neutral facilities and contains provisions for privacy compartments.

Chapter 5 Water Heaters.

Chapter 5 regulates the design, approval, installation, and safety devices of fuel burning and other types of water heaters with the combustion air requirements for ventilation and dilution of flue gases for appliances installed in buildings. This chapter does not apply to direct-vent appliances. In addition, this chapter regulates the design, construction, installation, and maintenance of chimneys, vents, and their connections to fuel-burning appliances. Methods to supply combustion air may be supplied from an indoor air supply, outdoor air supply, a combination of indoor and outdoor air supply, mechanical air supply, or an engineered system. Combustion air provisions are based on the number of openings and the total
CPC § 2025 High relevance — show source text
The safety requirements provide protection for piping, material, and structures, with provisions for installation practices, removing stress and strain of the pipe, sleeving, and hanger support. The building’s structural stability is protected by the regulations for cutting and notching of structural members.

Chapter 4 Plumbing Fixtures and Fixture Fittings.

This chapter regulates the minimum number of plumbing fixtures of a specific type and quality for each building. The fixtures must be properly installed to be usable by the individuals occupying the building. The quality and design of every fixture must conform to the applicable referenced standard. Compliance with this chapter will result in a building or structure having acceptable plumbing fixtures for the sanitary, hygienic, cleaning, washing, and food preparation needs of the occupants. In addition to ensuring resilient fixtures, the chapter also takes into consideration gender-neutral facilities and contains provisions for privacy compartments.

Chapter 5 Water Heaters.

Chapter 5 regulates the design, approval, installation, and safety devices of fuel burning and other types of water heaters with the combustion air requirements for ventilation and dilution of flue gases for appliances installed in buildings. This chapter does not apply to direct-vent appliances. In addition, this chapter regulates the design, construction, installation, and maintenance of chimneys, vents, and their connections to fuel-burning appliances. Methods to supply combustion air may be supplied from an indoor air supply, outdoor air supply, a combination of indoor and outdoor air supply, mechanical air supply, or an engineered system. Combustion air provisions are based on the number of openings and the total opening size required based on the total energy input rating of the appliance. An acceptable air supply for combustion and ventilation is necessary for the proper operation of fuel-burning appliances. A shortage of combustion air can result in incomplete combustion and the production of poisonous gases, such as carbon monoxide or appliance overheating. Ventilation air provides cooling for the appliance casing and internal controls. Inadequate ventilation of the space in which an appliance is installed can result in increased surrounding temperatures that stress the appliance itself or other appliances in the vicinity.

xiv 2025 CALIFORNIA PLUMBING CODE

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FORMAT OF THE UNIFORM PLUMBING CODE

Chapter 6 Water Supply and Distribution.

Chapter 6 regulates the design, material, and installation of water supply and distribution systems, including residential fire sprinklers. The water supply and distribution system is designed to achieve the correct water pressure and flow rates and avoid cross-connections. For fixtures to perform properly, an acceptable supply of potable water is essential to their operation and use. Cross-connections and backflow are ranked as the highest priority because of the long history of recognized health risks posed by cross-connections, outbreaks, or cases of waterborne disease. Piping materials and components are evaluated for their possible effect on the potable water with which they are in contact. The intent is to control the potential adverse health effects produced by indirect additives, products, and materials that come in contact with potable water. When selecting materials for water supply and distribution systems, consider water pressure, water temperature, compatibility with the water supply, durability, support, and sustainability.

CPC § 301.2.4 High relevance — show source text

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REFERENCED STANDARDS

TABLE 1701.1 (continued) REFERENCED STANDARDS

STANDARD NUMBER	STANDARD TITLE	APPLICATION	REFERENCED SECTION
CSA B45.11-2017/IAPMO Z401-2017 (R2021)	Glass Plumbing Fixtures	Fixtures	407.1
CSA B45.12-2013/IAPMO Z402-2013 (R2018)	Aluminum and Copper Plumbing Fixtures	Fixtures	407.1, 408.1, 409.1, 420.1
ASME A112.19.5- 2017/CSA B45.15-2017	Flush Valves and Spuds for Water Closets, Urinals, and Tanks	Fixtures	413.3
ASME A112.4.

CPC § 402.10 High relevance — show source text
402.10 Slip Joint Connections. Fixtures having concealed slip joint connections shall be provided with an access panel or utility space not less than 12 inches (305 mm) in its least dimension and so arranged without obstructions as to make such connections accessible for inspection and repair. 402.11 Future Fixtures. Where provisions are made for the future installation of fixtures, those provided for shall be considered in determining the required sizes of the drain and water supply piping. Construction for future installations shall be terminated with a plugged fitting or fittings. Where the plugged

fitting is at the point where the trap of a fixture is installed, the plumbing system for such fixture shall be complete and be in accordance with the plumbing requirements of this code.

403.0 Accessible Plumbing Facilities. 403.1 General. Where accessible facilities are required in applicable building regulations, the facilities shall be installed in accordance with those regulations. [HCD 1-AC] For spe- cific requirements regarding accommodations for persons with disabilities, see Chapter 11A of the California Building Code. 403.2 Fixtures and Fixture Fittings for Persons with Disabilities. Plumbing fixtures and fixture fittings for persons with disabilities shall be in accordance with ICC A117.1 and the applicable standards referenced in Chapter 4. [HCD 1-AC] Specific requirements regarding accommodations for persons with disabilities are contained in Chapter 11A of the California Building Code. 403.3 Exposed Pipes and Surfaces. Water supply and drainpipes under accessible lavatories and sinks shall be insulated or otherwise be configured to protect against contact. Protectors, insulators, or both shall comply with ASME A112.18.9 or ASTM C1822. [HCD 1-AC] Specific requirements regard- ing accommodations for persons with disabilities are contained in Chapter 11A of the California Building Code.

404.0 Waste Fittings and Overflows. 404.1 Waste Fittings. Waste fittings shall comply with ASME A112.18.2/CSA B125.2, ASTM F409 or Table 701.2 for aboveground drainage piping and fittings. 404.2 Overflows. Where a fixture is provided with an overflow, the overflow shall comply with Section 404.2.1 or Section 404.2.2.

404.2.1 Sinks, Lavatories, and Bathtubs. The waste shall be so arranged that the standing water in the fixture shall not rise in the overflow where the stopper is closed or remain in the overflow where the fixture is empty. The overflow pipe from a fixture shall be connected to the house or inlet side of the fixture trap.

404.2.2 Water Closets and Urinals. Overflows on flush tanks shall be permitted to discharge into the water closets or urinals served by them.

405.0 Prohibited Fixtures.

405.1 Prohibited Water Closets. Water closets having an invisible seal or an unventilated space or having walls which are not thoroughly washed at each discharge shall be prohibited. A water closet that might permit siphonage of the contents of the bowl back into the tank shall be prohibited. 405.2 Prohibited Urinals. Trough urinals and urinals with an invisible seal shall be prohibited.
CPC § 401.2 High relevance — show source text
401.2 Quality of Fixtures . . . . . . . . . . . . .59

401.3 Water-Conserving Fixtures and Fittings . . . . . . . . . . . . . . . . . . .59

402.0 Installation . . . . . . . . . . . . . . . . . . .59

402.1 Cleaning . . . . . . . . . . . . . . . . . . . . .59

402.2 Joints . . . . . . . . . . . . . . . . . . . . . . .59

402.3 Securing Fixtures . . . . . . . . . . . . . .59

402.4 Wall-Hung Fixtures . . . . . . . . . . . . .59

402.5 Setting . . . . . . . . . . . . . . . . . . . . . .59

402.6 Flanged Fixture Connections . . . . .59

402.7 Supply Fittings . . . . . . . . . . . . . . . .60

402.8 Installation . . . . . . . . . . . . . . . . . . .60

402.9 Design and Installation of Plumbing Fixtures . . . . . . . . . . . . . .60

402.10 Slip Joint Connections . . . . . . . . . .60

402.11 Future Fixtures . . . . . . . . . . . . . . . .60

403.0 Accessible Plumbing Facilities . . . .60

403.1 General . . . . . . . . . . . . . . . . . . . . . .60

403.2 Fixtures and Fixture Fittings for Persons with Disabilities . . . . . .60

403.3 Exposed Pipes and Surfaces . . . . .60

404.0 Waste Fittings and Overflows . . . . .60

404.1 Waste Fittings . . . . . . . . . . . . . . . . .60

404.2 Overflows . . . . . . . . . . . . . . . . . . . .60

405.0 Prohibited Fixtures . . . . . . . . . . . . .60

405.1 Prohibited Water Closets . . . . . . . .60

405.2 Prohibited Urinals . . . . . . . . . . . . . .60

405.3 Miscellaneous Fixtures . . . . . . . . . .60

406.0 Special Fixtures and Specialties . . .61

406.1 Water and Waste Connections . . . .61

406.2 Special Use Sinks . . . . . . . . . . . . .61

406.3 Special Use Fixtures . . . . . . . . . . .61

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TABLE OF CONTENTS

406.4 Zinc Alloy Components . . . . . . . . .61

407.0 Lavatories . . . . . . . . . . . . . . . . . . . .61

407.1 Application . . . . . . . . . . . . . . . . . . .61

407.2 Water Consumption . . . . . . . . . . . .61

407.3 Limitation of Hot Water
CPC § 402.6.1 High relevance — show source text
Wall-mounted water closet fixtures shall be securely bolted to an approved carrier fitting. The approved carrier fitting shall be securely attached to the structure. The connecting pipe between the carrier fitting and the fixture shall be an approved material and designed to accommodate an adequately sized gasket. Gasket material shall be neoprene, felt, or similar approved types.

402.6.1 Closet Rings (Closet Flanges). Closet rings (closet flanges) for water closets or similar fixtures shall be of an approved type and shall be copper alloy, copper, hard lead, cast-iron, galvanized malleable iron,

2025 CALIFORNIA PLUMBING CODE 59

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PLUMBING FIXTURES AND FIXTURE FITTINGS

ABS, PVC, or other approved materials. Closet rings (closet flanges) shall be approximately 7 inches (178 mm) in diameter and, where installed, shall, together with the soil pipe, present a 1 [1] ⁄ 2 inch (38 mm) wide flange or face to receive the fixture gasket or closet seal.

Caulked-on closet rings (closet flanges) shall be not less than [1] ⁄ 4 of an inch (6.4 mm) thick and not less than 2 inches (51 mm) in overall depth.

Closet rings (closet flanges) shall be burned or soldered to lead bends or stubs, shall be caulked to cast-iron soil pipe, shall be solvent cemented to ABS and PVC, and shall be screwed or fastened in an approved manner to other materials.

Closet bends or stubs shall be cut-off to present a smooth surface even with the top of the closet ring before the rough inspection is called.

Closet rings (closet flanges) shall be adequately designed and secured to support fixtures connected thereto.

402.6.2 Securing Closet Flanges. Closet screws, bolts, washers, and similar fasteners shall be of copper alloy, copper, or other listed equally corrosion-resistant materials. Screws and bolts shall be of a size and number to properly support the fixture installed. 402.6.3 Securing Floor-Mounted, Back-Outlet Water Closet Bowls. Floor-mounted, back-outlet water closet bowls shall be set level with an angle of 90 degrees (1.57 rad) between the floor and wall at the centerline of the fixture outlet. The floor and wall shall have a flat mounting surface not less than 5 inches (127 mm) to the right and left of the fixture outlet centerline. The closet flange shall be secured to the wall mounting surface. Offset, eccentric, or reducing closet flanges shall not be permitted with these fixtures.

The fixture shall be secured to the wall outlet flange or drainage connection and the floor by corrosion-resistant screws or bolts.

402.7 Supply Fittings. The supply lines and fittings for every plumbing fixture shall be so installed as to prevent backflow in accordance with Chapter 6.

402.8 Installation. Fixtures shall be installed in accordance

with the manufacturer’s installation instructions.

402.9 Design and Installation of Plumbing Fixtures. Plumbing fixtures shall be installed in accordance with the manufacturer’s installation instructions. The means of backflow prevention shall not be compromised by the designated fixture fitting mounting surface. **402.10 Slip Joint Connections.
CPC § 402.6.2 High relevance — show source text
Closet rings (closet flanges) shall be adequately designed and secured to support fixtures connected thereto.

402.6.2 Securing Closet Flanges. Closet screws, bolts, washers, and similar fasteners shall be of copper alloy, copper, or other listed equally corrosion-resistant materials. Screws and bolts shall be of a size and number to properly support the fixture installed. 402.6.3 Securing Floor-Mounted, Back-Outlet Water Closet Bowls. Floor-mounted, back-outlet water closet bowls shall be set level with an angle of 90 degrees (1.57 rad) between the floor and wall at the centerline of the fixture outlet. The floor and wall shall have a flat mounting surface not less than 5 inches (127 mm) to the right and left of the fixture outlet centerline. The closet flange shall be secured to the wall mounting surface. Offset, eccentric, or reducing closet flanges shall not be permitted with these fixtures.

The fixture shall be secured to the wall outlet flange or drainage connection and the floor by corrosion-resistant screws or bolts.

402.7 Supply Fittings. The supply lines and fittings for every plumbing fixture shall be so installed as to prevent backflow in accordance with Chapter 6.

402.8 Installation. Fixtures shall be installed in accordance

with the manufacturer’s installation instructions.

402.9 Design and Installation of Plumbing Fixtures. Plumbing fixtures shall be installed in accordance with the manufacturer’s installation instructions. The means of backflow prevention shall not be compromised by the designated fixture fitting mounting surface. 402.10 Slip Joint Connections. Fixtures having concealed slip joint connections shall be provided with an access panel or utility space not less than 12 inches (305 mm) in its least dimension and so arranged without obstructions as to make such connections accessible for inspection and repair. 402.11 Future Fixtures. Where provisions are made for the future installation of fixtures, those provided for shall be considered in determining the required sizes of the drain and water supply piping. Construction for future installations shall be terminated with a plugged fitting or fittings. Where the plugged

fitting is at the point where the trap of a fixture is installed, the plumbing system for such fixture shall be complete and be in accordance with the plumbing requirements of this code.

403.0 Accessible Plumbing Facilities. 403.1 General. Where accessible facilities are required in applicable building regulations, the facilities shall be installed in accordance with those regulations. [HCD 1-AC] For spe- cific requirements regarding accommodations for persons with disabilities, see Chapter 11A of the California Building Code. 403.2 Fixtures and Fixture Fittings for Persons with Disabilities. Plumbing fixtures and fixture fittings for persons with disabilities shall be in accordance with ICC A117.1 and the applicable standards referenced in Chapter 4. [HCD 1-AC] Specific requirements regarding accommodations for persons with disabilities are contained in Chapter 11A of the California Building Code. 403.3 Exposed Pipes and Surfaces. Water supply and drainpipes under accessible lavatories and sinks shall be insulated or otherwise be configured to protect against contact. Protectors, insulators, or both shall comply with ASME A112.18.9 or ASTM C1822.
CPC § 1.11.0. High 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.

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CHAPTER 4

PLUMBING FIXTURES AND FIXTURE FITTINGS

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

401.0 General.

401.1 Applicability. This chapter shall govern the materials and installation of plumbing fixtures, including faucets and fixture fittings, and the minimum number of plumbing fixtures required based on occupancy. 401.2 Quality of Fixtures. Plumbing fixtures shall be constructed of dense, durable, non-absorbent materials and shall have smooth, impervious surfaces, free from unnecessary concealed fouling surfaces. 401.3 Water-Conserving Fixtures and Fittings. Note 1: [BSC-CG & DSA-SS] Flow rates for specified plumbing fixtures for mandatory nonresidential construction are contained in Chapter 5, Division 5.3 of the California Green Building Standards Code (Part 11, Title 24, Califor- nia Code of Regulations - CALGreen). Scoping provisions applicable to nonresidential additions and alterations are contained in Section 301.3 of CALGreen. Note 2: [BSC-CG] On and after January 1, 2014, certain commercial real property, as defined in Civil Code Section 1101.3, shall have its noncompliant plumbing fixtures replaced with appropriate water-conserving plumbing fix- tures under specific circumstances. See Civil Code Section 1101.1 et seq. for definitions, types of commercial real prop- erty affected, effective dates, circumstances necessitating replacement of noncompliant plumbing fixtures, and duties and responsibilities for ensuring compliance.

[HCD-1] All noncompliant plumbing fixtures in any residen- tial real property shall be replaced with water-conserving plumbing fixtures. Plumbing fixture replacement is required prior to issuance of a certificate of final completion, certificate of occupancy, or final permit approval by the local building _department.

CPC § 1501.7 Medium relevance — show source text

348 2025 CALIFORNIA PLUMBING CODE

REFERENCED STANDARDS

TABLE 1701.1 (continued) REFERENCED STANDARDS

STANDARD NUMBER	STANDARD TITLE	APPLICATION	REFERENCED SECTION
IAPMO/ANSI Z601-2018	Scale Reduction Devices	Water Conditioning, Water Treatment	611.1.2
ANSI/CAN/IAPMO Z1001- 2021	Prefabricated Gravity Grease Interceptors	Fixtures	Table 1009.1, 1014.1,

CPC § 14.3 Medium relevance — show source text

2025 CALIFORNIA PLUMBING CODE 335

REFERENCED STANDARDS

TABLE 1701.1 (continued) REFERENCED STANDARDS

STANDARD NUMBER	STANDARD TITLE	APPLICATION	REFERENCED SECTION
ASME A112.14.6-2010 (R2019)	FOG (Fats, Oils, and Greases) Disposal Systems	Fixtures	1015.2, Table 1009.1
ASME A112.18.1- 2018/CSA B125.1-2018	Plumbing Supply Fittings	Fittings	408.4, 417.1, 417.2, 417.3, 417.4, 417.6, 603.5.20
ASME A112.18.2- 2020/CSA B125.2-2020	Plumbing Waste Fittings	Fittings	404.1, 408.5
ASME A112.18.3-2002 (R2017)	Backflow Protection Devices and Systems in Plumbing Fixture Fittings	Backflow Protection	417.3, 417.4
ASME A112.18.6-2017/ CSA B125.6-2017 (R2021)	Flexible Water Connectors	Piping	604.5, 604.13
ASME A112.18.8-2020	Sanitary Waste Valves for Plumbing Drainage Systems	Sanitary Waste Valves	814.4
ASME A112.18.9-2011 (R2017)	Protectors/Insulators for Exposed Waste and Supplies on Accessible Fixtures	Miscellaneous	403.3
ASME A112.19.1- 2018/CSA B45.2-2018	Enameled Cast Iron and Enameled Steel Plumbing Fixtures	Fixtures	407.1, 408.1, 409.1, 415.1, 420.1
ASME A112.19.2- 2018/CSA B45.1-2018	Ceramic Plumbing Fixtures	Fixtures	407.1, 408.1, 409.1, 410.1, 411.1, 412.1, 415.1, 420.1
ASME A112.19.3- 2017/CSA B45.4-2017	Stainless Steel Plumbing Fixtures	Fixtures	407.1, 408.1, 409.1, 410.1, 411.1, 415.1, 420.1
ASME A112.19.5- 2017/CSA B45.15-2017	Flush Valves and Spuds for Water Closets, Urinals, and Tanks	Fixtures	413.3
ASME A112.19.7- 2020/CSA B45.

CPC § 318.1 Medium relevance — show source text
318.1 General . . . . . . . . . . . . . . . . . . . . . .54

318.2 Pressure Tests (10 psi or less) . . .54

318.3 Pressure Tests (greater than 10 psi to 100 psi) . . . . . . . . . . . . . .54

318.4 Pressure Tests (exceeding 100 psi) . . . . . . . . . . . . . . . . . . . . . .54

318.5 Pressure Range . . . . . . . . . . . . . . .54

319.0 Medical Gas and Vacuum

Systems . . . . . . . . . . . . . . . . . . . . .54

319.1 General . . . . . . . . . . . . . . . . . . . . . .54

320.0 Rehabilitation of Piping Systems . .54

320.1 General . . . . . . . . . . . . . . . . . . . . . .54

321.0 Essential Plumbing Provisions . . . .54

322.0 Psychiatric Services . . . . . . . . . . . .54

323.0 Plumbing Equipment Schedules . . .55

Table 313.3 Hangers and Supports . . . . . . . . . .55

CHAPTER 4 PLUMBING FIXTURES

AND FIXTURE FITTINGS . . . . . . .57

401.0 General . . . . . . . . . . . . . . . . . . . . . .59

401.1 Applicability . . . . . . . . . . . . . . . . . . .59

401.2 Quality of Fixtures . . . . . . . . . . . . .59

401.3 Water-Conserving Fixtures and Fittings . . . . . . . . . . . . . . . . . . .59

402.0 Installation . . . . . . . . . . . . . . . . . . .59

402.1 Cleaning . . . . . . . . . . . . . . . . . . . . .59

402.2 Joints . . . . . . . . . . . . . . . . . . . . . . .59

402.3 Securing Fixtures . . . . . . . . . . . . . .59

402.4 Wall-Hung Fixtures . . . . . . . . . . . . .59

402.5 Setting . . . . . . . . . . . . . . . . . . . . . .59

402.6 Flanged Fixture Connections . . . . .59

402.7 Supply Fittings . . . . . . . . . . . . . . . .60

402.8 Installation . . . . . . . . . . . . . . . . . . .60

402.9 Design and Installation of Plumbing Fixtures . . . . . . . . . . . . . .60

402.10 Slip Joint Connections . . . . . . . . . .60

402.11 Future Fixtures . . . . . . . . . . . . . . . .60

403.0 Accessible Plumbing Facilities . . . .60

403.1 General . . . . . . . . . . . . . . . . . . . . . .60

CPC § 408.1 Medium relevance — show source text

348 2025 CALIFORNIA PLUMBING CODE

REFERENCED STANDARDS

TABLE 1701.1 (continued) REFERENCED STANDARDS

STANDARD NUMBER	STANDARD TITLE	APPLICATION	REFERENCED SECTION
IAPMO/ANSI Z601-2018	Scale Reduction Devices	Water Conditioning, Water Treatment	611.1.2
ANSI/CAN/IAPMO Z1001- 2021	Prefabricated Gravity Grease Interceptors	Fixtures	Table 1009.1, 1014.1, 1014.3.4
IAPMO/ANSI Z1002-2020	Rainwater Harvesting Tanks	Rainwater Tanks	1603.5
IAPMO/ANSI Z1033-2015 (R2020)	Flexible PVC Hoses and Tubing for Pools, Hot Tubs, Spas, and Jetted Bathtubs	Tubing	409.6.2
IAPMO/ANSI Z1088-2019e1	Pre-Pressurized Water Expansion Tanks	Miscellaneous	608.3
IAPMO/ANSI Z1157- 2014e1 (R2019)	Ball Valves	Valves	606.1
ANSI/CAN/IAPMO Z1349- 2021	Devices for Detection, Monitoring or Control of Plumbing Systems	Leak Detection	606.9
CSA B125.5-2011/IAPMO Z600-2011 (R2016)	Flexible Water Connectors with Excess Flow Shut-off Device	Miscellaneous	604.5
ICC	ICC	ICC	ICC
ICC A117.1-2017	Accessible and Usable Buildings and Facilities	Miscellaneous	403.2
ISEA	ISEA	ISEA	ISEA
ISEA Z358.1-2014	Emergency Eyewash and Shower Equipment	Miscellaneous	416.1, 416.2
MSS	MSS	MSS	MSS
MSS SP-58-2018	Pipe Hangers and Supports – Materials, Design, Manufacture, Selection, Application, and Installation	Miscellaneous	1210.3.5, 1323.4.

Frequently asked questions

Which CPC sections set fixture quality and water‑conserving requirements?

Fixture construction and quality requirements are in § 401.2, and mandatory water‑conserving fixture and fitting provisions are in § 401.3; those provisions reference CALGreen and the listed standards for flow rates and performance .

Where are the installation and supply‑fitting rules for fixtures?

Installation details are in the § 402.0 series (cleaning, joints, securing, wall‑hung fixtures, etc.), with supply‑fitting and backflow‑prevention requirements specifically noted in § 402.7 and access/maintenance items in § 402.10 .

How do I find the required minimum number of fixtures for an occupancy?

Minimum fixture counts and occupant‑load tables are in § 422.1 and the related tables in Chapter 4; those specify required water closets, lavatories, and other fixtures by occupancy and occupant load .

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Related in the CPC

Administration

Definitions

General Regulations

Water Heaters

Water Supply and Distribution

Sanitary Drainage (Drain, Waste, and Vent)

Indirect Wastes

Vents

California Plumbing Code

Plumbing Fixtures and Fixture Fittings

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