Fixture installation, traps and cleanouts

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

• CRC § 501.6 High relevance — show source text

  ** Water supply fixture units shall be determined by the manufacturer’s instructions.

  C 501.6 Materials. Materials used for water distribution pipe and fittings shall be in accordance with Table 604.1. Materials used for aboveground drainage shall be in accordance with Table 701.2 and shall have a smooth bore, and be constructed of non-porous material. C 501.7 Traps and Cleanouts. Traps and cleanouts shall be installed in accordance with Chapter 7 and Chapter 10. C 501.8 Testing. The entire vacuum waste system shall be subjected to a vacuum test of 29 inches of mercury (98 kPa) or not less than the working pressure of the system for 30 minutes. The system shall be gastight and watertight at all points. Verification of test results shall be submitted to the Authority Having Jurisdiction.

  C 501.9 Manufacturer’s Instructions. Manufacturer’s instructions shall be provided to provide information regarding safe and proper operating instructions whether or not as part of the condition of listing to determine compliance. Such instructions shall be submitted and approved by the Authority Having Jurisdiction.

  C 601.0 Single-Stack Vent System. C 601.1 Where Permitted. Single-stack venting shall be designed by a registered design professional as an engineered design. A drainage stack shall be permitted to serve as a single-stack vent system where sized and installed in accordance with Section C 601.2 through Section C 601.10. The drainage stack and branch piping in a single-stack vent system shall provide for the flow of liquids, solids, and air without exceeding the pressure differential described in Section 901.3. C 601.2 Stack Size. Drainage stacks shall be sized in accordance with Table C 601.2. Not more than two water closets shall be permitted to discharge to a 3 inch (80 mm) stack. Stacks shall be uniformly sized based on the total connected drainage fixture unit load, with no reductions in size. C 601.2.1 Stack Vent. The drainage stack vent shall have a stack vent of the same size terminating to the outdoors. C 601.3 Branch Size. Horizontal branches connecting to a single-stack vent system shall be sized in accordance with Table 703.2.

  Exceptions:

  (1) Not more than one water closet within 18 inches (457 mm) of the stack horizontally shall be permitted on a 3 inch (80 mm) horizontal branch.

  (2) A water closet within 18 inches (457 mm) of a stack horizontally and one other fixture with up to 1 [1] ⁄ 2 inch (40 mm) fixture drain size shall be permitted on a 3 inch (80 mm) horizontal branch where connected to the stack through a sanitary tee. C 601.4 Length of Horizontal Branches. Water closets shall be not more than 4 feet (1219 mm) horizontally from the stack.

  Exception: Water closets shall be permitted to be up to 8 feet (2438 mm) horizontally from the stack where connected to the stack through a sanitary tee.

  C 601.4.1 Other Fixtures. Fixtures other than water closets shall be not more than 12 feet (3658 mm) horizontally from the stack. C 601.4.2 Length of Vertical Piping. The length of vertical piping from a fixture trap to a horizontal branch shall not be considered in computing the fixture’s horizontal distance from the stack.

  **C 601.5 Maximum Vertical Drops from Fixtures.

• CRC § 501.3 Medium relevance — show source text

  (3) Activate an audible alarm where the level of effluent is usually high.

  (4) Warning of system shutdown where the tank is full.

  C 501.3 Fixtures. Fixtures utilized in a vacuum waste drainage system shall be in accordance with referenced standards listed in Chapter 17. Components shall be of corrosion resistant materials. The water closet outlet shall be able to pass a 1 inch (25.4 mm) diameter ball and shall have a smooth, impervious surface. The waste outlet and passages shall be free of obstructions, recesses, or chambers that are capable of permitting fouling. The mechanical valve and its seat shall be of such materials and design to provide a leakfree connection where at atmospheric pressure or under vacuum. The flushing mechanism shall be so designed as to ensure proper cleansing of the interior surfaces during the flushing cycle at a minimum operating flow rate. Mechanical seal mechanisms shall withdraw completely from the path of the waste discharge during the flushing operation. Each mechanical seal vacuum water closet shall be equipped with a listed vacuum breaker. The vacuum breaker shall be mounted with the critical level or marking not less than 1 inch (25.4 mm) above the flood-level rim of the fixture. Vacuum breakers shall be installed on the discharge side of the last control valve in the potable water supply line and shall be located to be protected from physical damage and contamination. C 501.4 Drainage Fixture Units. Drainage fixture units shall be determined by the manufacturer’s instructions. The pump discharge load from the collector tanks shall be in accordance with this appendix. C 501.5 Water Supply Fixture Units. Water supply fixture units shall be determined by the manufacturer’s instructions.

  C 501.6 Materials. Materials used for water distribution pipe and fittings shall be in accordance with Table 604.1. Materials used for aboveground drainage shall be in accordance with Table 701.2 and shall have a smooth bore, and be constructed of non-porous material. C 501.7 Traps and Cleanouts. Traps and cleanouts shall be installed in accordance with Chapter 7 and Chapter 10. C 501.8 Testing. The entire vacuum waste system shall be subjected to a vacuum test of 29 inches of mercury (98 kPa) or not less than the working pressure of the system for 30 minutes. The system shall be gastight and watertight at all points. Verification of test results shall be submitted to the Authority Having Jurisdiction.

  C 501.9 Manufacturer’s Instructions. Manufacturer’s instructions shall be provided to provide information regarding safe and proper operating instructions whether or not as part of the condition of listing to determine compliance. Such instructions shall be submitted and approved by the Authority Having Jurisdiction.

  C 601.0 Single-Stack Vent System. C 601.1 Where Permitted. Single-stack venting shall be designed by a registered design professional as an engineered design. A drainage stack shall be permitted to serve as a single-stack vent system where sized and installed in accordance with Section C 601.2 through Section C 601.10. The drainage stack and branch piping in a single-stack vent system shall provide for the flow of liquids, solids, and air without exceeding the pressure differential described in Section 901.3. C 601.2 Stack Size. Drainage stacks shall be sized in accordance with Table C 601.2.

• CRC § 910.0 Medium relevance — show source text

  910.0 Combination Waste and Vent Systems. 910.1 Where Permitted. Combination waste and vent systems shall be permitted where structural conditions preclude the installation of conventional systems as otherwise prescribed by this code. 910.2 Approval. Construction documents for each combination waste and vent system shall first be approved by the Authority Having Jurisdiction before a portion of such system is installed.

  910.3 Vents. Each combination waste and vent system, as defined in Chapter 2, shall be provided with a vent or vents adequate to ensure free circulation of air. A branch exceeding 15 feet (4572 mm) in length shall be separately vented in an approved manner. The area of a vent installed in a combination waste and vent system shall be not less than one-half the inside cross-sectional area of the drainpipe served. The vent connection shall be downstream of the uppermost fixture. 910.4 Connections and Size. Branches serving traps shall connect to the main line at an angle not exceeding 2 percent. Each waste pipe and each trap in such a system shall be not less than two pipe sizes exceeding the sizes required by Chapter 7 of this code, and not less than two pipe sizes exceeding a fixture tailpiece or connection. 910.5 Vertical Waste Pipe. No vertical waste pipe shall be used in such a system, except the tailpiece or connection between the outlet of a plumbing fixture and the trap. Such tailpieces or connections shall be as short as possible, and in no case shall exceed 2 feet (610 mm).

  Exception: Branch lines shall be permitted to have 45 degree (0.79 rad) vertical offsets.

  910.6 Cleanouts. An accessible cleanout shall be installed in each vent for the combination waste and vent system. Cleanouts shall not be required on a wet-vented branch serving a single trap where the fixture tailpiece or connection is not less than 2 inches (50 mm) in diameter and provides ready access for cleaning through the trap.

  910.7 Fixtures. No water closet or urinal shall be installed on such a system. Other one, two, or three unit fixtures remotely located from the sanitary system and adjacent to a combination waste and vent system shall be permitted to be connected to such system in the conventional manner by means of waste and vent pipes of regular sizes, providing that the two pipe size increase required in Section 910.4 is based on the total fixture unit load connected to the system.

  See Appendix B of this code for explanatory notes on the design of combination waste and vent systems.

  911.0 Circuit Venting. 911.1 Circuit Vent Permitted. A maximum of eight flooroutlet water closets, showers, bathtubs, or floor drains con

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  VENTS

  nected to a horizontal branch shall be permitted to be circuit vented. Each trap arm shall connect horizontally to the horizontal branch being circuit vented in accordance with Table 1002.2. The horizontal branch shall be classified as a drain and a vent from the most downstream trap arm connection to the most upstream trap arm connection to the horizontal branch.

  Exception: Back-outlet and wall-hung water closets shall be permitted to be circuit vented provided that no floor-outlet fixtures are connected to the same horizontal branch. Backoutlet and wall-hung water closets shall connect horizontally to the horizontal circuit vented drain.

• CRC § 25.4 Medium relevance — show source text

  For SI units: 1 inch = 25.4 mm

  Notes: 1 Maintain 1 ⁄ 4 inch per foot slope (20.8 mm/m). 2 The developed length between the trap of a water closet or similar fixture (measured from the face of the closet flange to the inner edge of the vent) and its vent shall not exceed 6 feet (1829 mm). 3 Horizontally wet vented bathtubs, showers and similar fixtures shall be limited to a maximum of 6 feet (1829 mm) for 1½ inch (40 mm) fixture drains and 8 feet (2438 mm) for 2 inch (50 mm) fixture drains, maintaining ¼ inch per foot slope (20.8 mm/m).

  1003.2 Slip Joint Fittings. A maximum of one approved slip joint fitting shall be permitted to be used on the outlet side of a trap, and no tubing trap shall be installed without a listed tubing trap adapter. Listed plastic trap adapters shall be permitted to be used to connect listed metal tubing traps.

  1003.3 Size. The size (nominal diameter) of a trap for a given fixture shall be sufficient to drain the fixture rapidly but in no case less than nor more than one pipe size larger than given in Table 702.1. The trap shall be the same size as the trap arm to which it is connected.

  TABLE 1002.2

  HORIZONTAL LENGTHS OF TRAP ARMS (EXCEPT FOR WATER CLOSETS AND SIMILAR FIXTURES) [1, 2, 3]

  For SI units: 1 inch = 25.4 mm

  Notes: 1 Maintain 1 ⁄ 4 inch per foot slope (20.8 mm/m). 2 The developed length between the trap of a water closet or similar fixture (measured from the face of the closet flange to the inner edge of the vent) and its vent shall not exceed 6 feet (1829 mm). 3 Horizontally wet vented bathtubs, showers and similar fixtures shall be limited to a maximum of 6 feet (1829 mm) for 1½ inch (40 mm) fixture drains and 8 feet (2438 mm) for 2 inch (50 mm) fixture drains, maintaining ¼ inch per foot slope (20.8 mm/m).

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  TRAPS AND INTERCEPTORS

  1004.0 Traps.

  1004.1 Prohibited. No form of trap that depends for its seal upon the action of movable parts shall be used. No trap that has concealed interior partitions, except those of plastic, glass, or similar corrosion-resisting material, shall be used. “S” traps, bell traps, and crown-vented traps shall be prohibited. No fixture shall be double trapped. Drum and bottle traps shall be installed for special conditions. No trap shall be installed without a vent, except as otherwise provided in this code.

  1004.2 Movable Parts. Bladders, check valves or another type of devices with moveable parts shall be prohibited to serve as a trap.

• CRC § 101.3 Medium relevance — show source text

  Combination waste and vent systems are intended primarily for extensive floor or shower drain installations where separate venting is not practical, for floor sinks in markets, demonstration or work tables in school buildings, or for similar applications where the fixtures are not adjacent to walls or partitions. Due to its oversize characteristics, such a waste system is not self-scouring and, consequently, care shall be exercised as to the type of fixtures connected to it and the location of cleanouts. Given its grease-producing potential, restaurant kitchen equipment shall not be connected to a combination waste and vent system.

  B 101.3 Caution. Caution shall be exercised to exclude appurtenances delivering large quantities or surges of water (such as pumps, sand interceptors, etc.) from combination waste and vent systems so that adequate venting will be maintained. Small fixtures with a waste-producing potential of less than 7 [1] ⁄ 2 gallons per minute (gpm) (0.47 L/s) shall be permitted to be safely assigned a loading value of one unit. Long runs shall be laid at the minimum permissible slope to keep tailpieces as short as possible. Tailpieces shall not exceed 2 feet (610 mm) in length, which shall necessitate slopes up to 45 degrees (0.79 rad) (see definition of horizontal pipe) on some branches.

  B 101.4 Pneumatics. It is essential that the pneumatics of such a system be properly engineered, as the air pressure within the line shall at all times balance that of outside atmosphere to prevent either trap seal loss or air locking between traps. Long mains shall be provided with additional relief vents located at intervals not exceeding 100 feet (30 480 mm). Each such relief vent shall equal not less than one-half of the inside cross-sectional area of the drainpipe served.

  B 101.5 Trap Sizes. Trap sizes are required to be equivalent to the branches they serve (two pipe sizes larger than normal), and tailpieces between fixtures or floor drains and such traps shall be reduced to normal size.

  B 101.6 Layout Drawings. Duplicate layout drawings of each such proposed piping system shall be presented to the Authority Having Jurisdiction and approval obtained before an installation is made. Complicated layouts shall be checked by qualified personnel. B 101.6.1 Example of Sizing. A floor drain normally requires a 2 inch (50 mm) trap and waste. On a combination waste and vent system, both trap and waste shall be increased two pipe sizes (through 2 [1] ⁄ 2 inches and 3 inches) (65 mm and 80 mm), which would make the trap 3 inches (80 mm). Pipe sizes recognized for this purpose are 2 inches, 2 [1] ⁄ 2 inches, 3 inches, 3 [1] ⁄ 2 inches, 4 inches, 4 [1] ⁄ 2 inches, 5 inches, 6 inches, etc. (50 mm, 65 mm, 80 mm, 90 mm, 100 mm, 115 mm, 125 mm, 150 mm, etc.). The tailpiece between the floor drain and its trap shall be 2 inches (50 mm) (or normal size) to ensure that the amount of wastewater entering the trap partially fills the waste branch.

• CRC § 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.

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  APPENDIX B

  EXPLANATORY NOTES ON COMBINATION WASTE AND VENT SYSTEMS

  (See Section 910.0 for specific limitations)

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

  B 101.0 General.

  B 101.1 Applicability. This appendix provides general guidelines for the design and installation of a combination waste and vent system.

  B 101.2 General Requirements. Combination waste and vent systems, (which at best are merely an expedient designed to be used in locations where it would be structurally impractical to provide continuous venting of fixtures) as outlined in Section 910.0 of this code, cover the horizontal wet venting of a series of traps using a common waste and vent pipe. Pipe sizes not less than two pipe sizes larger than those required for a conventional system are designed to maintain a wetted perimeter or flow line low enough in the waste pipe to allow adequate air movement in the upper portion, thus balancing the system. One and two unit fixtures that rough in above the floor, shall be permitted to connect to a combination waste and vent system when located as required in Section 910.7.

  Combination waste and vent systems are intended primarily for extensive floor or shower drain installations where separate venting is not practical, for floor sinks in markets, demonstration or work tables in school buildings, or for similar applications where the fixtures are not adjacent to walls or partitions. Due to its oversize characteristics, such a waste system is not self-scouring and, consequently, care shall be exercised as to the type of fixtures connected to it and the location of cleanouts. Given its grease-producing potential, restaurant kitchen equipment shall not be connected to a combination waste and vent system.

  B 101.3 Caution. Caution shall be exercised to exclude appurtenances delivering large quantities or surges of water (such as pumps, sand interceptors, etc.) from combination waste and vent systems so that adequate venting will be maintained. Small fixtures with a waste-producing potential of less than 7 [1] ⁄ 2 gallons per minute (gpm) (0.47 L/s) shall be permitted to be safely assigned a loading value of one unit. Long runs shall be laid at the minimum permissible slope to keep tailpieces as short as possible. Tailpieces shall not exceed 2 feet (610 mm) in length, which shall necessitate slopes up to 45 degrees (0.79 rad) (see definition of horizontal pipe) on some branches.

• CRC § 707.2 Medium relevance — show source text

  For SI units: 1 inch = 25 mm

  707.2 Approved. Each cleanout fitting and each cleanout plug or cap shall be of an approved type. A list of approved standards for cleanouts are referenced in Table 707.2.

  TABLE 707.2 CLEANOUT MATERIALS FOR DRAIN, WASTE, AND VENT

  MATERIAL	STANDARD
  ABS_1_	ASTM D2661, CSA B79, IAPMO IGC 78, IAPMO IGC 224
  Cast Iron	ASME A112.36.2M, ASTM A888, CISPI 301, CSA B79, IAPMO IGC 224
  Copper or Copper Alloy	ASME A112.36.2M, CSA B79
  Ductile Iron	CSA B79
  Elastomers	CSA B79, IAPMO PS 90
  Polyethylene (PE)	CSA B79
  Polypropylene (PP)	CSA B79
  PVC_1_	ASTM D2665, CSA B79, IAPMO IGC 78, IAPMO IGC 224
  Polyvinylidene Fluoride (PVDF)	CSA B79
  Stainless Steel	CSA B79

  1 [HCD 1 & HCD 2] ABS and PVC installations are limited to not more

  than two stories of areas of residential accommodation.

  707.3 Watertight and Gastight. Cleanouts shall be designed to be watertight and gastight. 707.4 Location. Each horizontal drainage pipe shall be provided with a cleanout at its upper terminal, and each run of piping, that is more than 100 feet (30 480 mm) in total developed length, shall be provided with a cleanout for each 100 feet (30 480 mm), or fraction thereof, in length of such piping. An additional cleanout shall be provided in a drainage line for each aggregate horizontal change in direction exceeding 135 degrees (2.36 rad). A cleanout shall be installed above the fixture connection fitting, serving each urinal, regardless of the location of the urinal in the building.

  TABLE 707.1

  CLEANOUTS

  For SI units: 1 inch = 25 mm

  TABLE 707.2 CLEANOUT MATERIALS FOR DRAIN, WASTE, AND VENT

  1 [HCD 1 & HCD 2] ABS and PVC installations are limited to not more

  than two stories of areas of residential accommodation.

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  SANITARY DRAINAGE

  Exceptions:

  (1) Cleanouts shall be permitted to be omitted on a horizontal drain line less than 5 feet (1524 mm) in length unless such line is serving sinks or urinals.

  (2) Cleanouts shall be permitted to be omitted on a horizontal drainage pipe installed on a slope of 72 degrees (1.26 rad) or less from the vertical angle (one-fifth bend).

• CRC § 801.4 Medium relevance — show source text

  The piping from the equipment to the receptor shall be not less than the drain on the unit and in no case less than [1] ⁄ 2 of an inch (15 mm).

  801.4 Bar and Fountain Sink Traps. Where the sink in a bar, soda fountain, or counter is so located that the trap serving the sink cannot be vented, the sink drain shall discharge through an air gap or air break (see Section 801.3.3) into an approved receptor that is vented. The developed length from the fixture outlet to the receptor shall not exceed 5 feet (1524 mm). 801.5 Connections from Water Distribution System. Indirect waste connections shall be provided for drains, overflows, or relief pipes from potable water pressure tanks, water heaters, boilers, and similar equipment that is connected to the potable water distribution system. Such indirect waste connections shall be made using a water-distribution air gap constructed in accordance with Table 603.3.1.

  801.6 Sterilizers. Lines, devices, or apparatus such as stills, sterilizers, and similar equipment requiring waste connections and used for sterile materials shall be indirectly connected using an air gap. Each such indirect waste pipe shall be separately piped to the receptor and shall not exceed 15 feet (4572 mm). Such receptors shall be located in the same room. 801.7 Drip or Drainage Outlets. Appliances, devices, or apparatus not regularly classified as plumbing fixtures, but which have a drip or drainage outlets, shall be permitted to be drained by indirect waste pipes discharging into an open receptor through either an air gap or air break (see Section 801.3.1).

  802.0 Approvals. 802.1 General. No plumbing fixtures served by indirect waste pipes or receiving discharge therefrom shall be installed until first approved by the Authority Having Jurisdiction.

  803.0 Indirect Waste Piping.

  803.1 Materials. Pipe, tube, and fittings conveying indirect waste shall be of such materials and design as to perform their intended function to the satisfaction of the Authority Having Jurisdiction.

  803.2 Copper and Copper Alloys. Joints and connections in copper and copper alloy pipe and tube shall be installed in accordance with Section 705.3.

  803.3 Pipe Size and Length. Except as hereinafter provided, the size of indirect waste piping shall be in accordance with other sections of this code applicable to drainage and vent piping. No vent from indirect waste piping shall combine with a sewer-connected vent. Vents from indirect waste piping shall extend separately to the outside air. Indirect waste pipes exceeding 5 feet (1524 mm), but less than 15 feet (4572 mm) in length shall be directly trapped, but such traps need not be vented.

  Indirect waste pipes less than 15 feet (4572 mm) in length shall be not less than the diameter of the drain outlet or

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  INDIRECT WASTES

  tailpiece of the fixture, appliance, or equipment served, and in no case less than [1] ⁄ 2 of an inch (15 mm). Angles and changes of direction in such indirect waste pipes shall be provided with cleanouts to permit flushing and cleaning.

  804.0 Indirect Waste Receptors.

  **804.1 Standpipe Receptors.

• CRC § 316.0 Medium relevance — show source text

  INCREASERS AND REDUCERS . . . . . . . . . . . . . . . .316.0

  INDIRECT-FIRED WATER HEATERS . . . . . . . .211.0, 505.4,

  603.5.4, 608.7 INDIRECT WASTE . . . . . . . . . . . . . . . . . . . . . . . .Chapter 8 Air gap or break . . . . . . . . . . . . . . . . . . . . . . . . . . .801.2 Appliances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .807.0 Approval required . . . . . . . . . . . . . . . . . . . . . . . . .802.0 Aspirators . . . . . . . . . . . . . . . . . . . . . . .603.5.9, 1303.5

  Chemical wastes . . . . . . . . . . . . . . . . . . . . . . . . . .811.0

  Cleanouts . . . . . . . . . . . . . . . . . . . . . . . . .801.3.2, 803.3

  Clear water wastes . . . . . . . . . . . . . . . . . . . . . . . .812.0

  Condensate . . . . . . . . . . . . . . . . . .814.1, 814.1.1, 814.5 Food handling fixtures . . . . . . . . . . . . . . . . . . . . .801.3.3 High temperature discharge . . . . . . . . . . . . . . . . .810.1 Interceptor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .902.1 Receptors . . . . . . . . . . . . . . . . . . . . . . . . . .801.4, 804.0 Sterile equipment . . . . . . . . . . . .801.6, 806.0, 1303.4.1 Swimming pools . . . . . . . . . . . . . . . . . . . . . . . . . .813.0 Traps . . . . . . . . . . . . . . . . . . . . . . .801.3.2, 803.3, 814.5

  Vents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .803.3

  Where required . . . . . . . . . . . . . . . . . . . . . . . . . . .801.2

  INDIVIDUAL VENTS . . . . . . . . . . .211.0, Table 703.2, 904.1,

  908.2.1

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  INDEX

  INDUSTRIAL WASTES

• CRC § 2-8 Medium relevance — show source text

  Residential-type appliance. An approved chimney for removing the products of combustion from fuel-burning, residential-type appliances producing combustion gases not in excess of 1,000°F (538°C) under normal operating conditions, and capable of producing combustion gases of 1,400°F (760°C) during intermittent forces firing for periods up to 1 hour. All temperatures shall be measured at the appliance flue outlet. Residential-type appliance chimneys include masonry and factory-built types.

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  DEFINITIONS

  CHRONICALLY ILL. See “TERMINALLY ILL.”

  [MP] CIRCUIT VENT. A vent that connects to a horizontal drainage branch and vents two traps to not more than eight traps or trapped fixtures connected into a battery.

  [MP] CIRCULATING HOT WATER SYSTEM. A specifically designed water distribution system where one or more pumps are operated in the service hot water piping to circulate heated water from the water-heating equipment to fixtures and back to the water-heating equipment.

  [RB] CLADDING. The exterior materials that cover the surface of the building envelope that is directly loaded by the wind.

  [MP] CLEANOUT. An access opening in the drainage system utilized for the removal of obstructions. Types of cleanouts include a removable plug or cap, and a removable fixture or fixture trap.

  [RE] CLIMATE ZONE. A geographical region based on climatic criteria as specified in this code.

  [RB] CLOSET. A small room or chamber used for storage.

  [RB] COLLAPSIBLE SOILS. Soils that exhibit volumetric reduction in response to partial or full wetting under load.

  [MP] COLLECTION PIPE. Unpressurized pipe used within the collection system that drains on-site nonpotable water or rainwater to a storage tank by gravity.

  [MP] COMBINATION WASTE AND VENT SYSTEM. A specially designed system of waste piping embodying the horizontal wet venting of one or more sinks, lavatories or floor drains by means of a common waste and vent pipe adequately sized to provide free movement of air above the flow line of the drain.

  [RB] COMBUSTIBLE MATERIAL. Any material not defined as noncombustible.

  [MP] COMBUSTION AIR. The air provided to fuel-burning equipment including air for fuel combustion, draft hood dilution and ventilation of the equipment enclosure.

  [RB] COMPRESSIBLE SOILS. Soils that exhibit volumetric reduction in response to the application of load even in the absence of wetting or drying.

  [MP] CONDENSATE. The liquid that separates from a gas due to a reduction in temperature; for example, water that condenses from flue gases and water that condenses from air circulating through the cooling coil in air conditioning equipment.

  [MP] CONDENSING APPLIANCE. An appliance that condenses water generated by the burning of fuels.

  [RB] CONDITIONED AIR. Air treated to control its temperature, relative humidity or quality.

• CRC § 1101.12.2.2 Medium relevance — show source text

  1101.12.2.2 Secondary Roof Drain. Secondary roof drains shall be provided. The secondary roof drains shall be located not less than 2 inches (51 mm) above the roof surface. The maximum height of the roof drains shall be a height to prevent the depth of ponding water from exceeding that for which the roof was designed as determined by Section 1101.12.1. The secondary roof drains shall connect to a piping system in accordance with Section 1101.12.2.2.1 or Section 1101.12.2.2.2.

  1101.12.2.2.1 Separate Piping System. The secondary roof drainage system shall be a

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  STORM DRAINAGE

  separate system of piping, independent of the primary roof drainage system. The discharge shall be above grade, in a location observable by the building occupants or maintenance personnel. Secondary roof drain systems shall be sized in accordance with Section 1101.12.1

  based on the rainfall rate for which the primary system is sized. 1101.12.2.2.2 Combined System. The secondary roof drains shall connect to the vertical piping of the primary storm drainage conductor downstream of the last horizontal offset located below the roof. The primary storm drainage system shall connect to the building storm water that connects to an underground public storm sewer. The combined secondary and primary roof drain systems shall be sized in accordance with Section 1103.0 based on double the rain fall rate for the local area.

  1101.13 Cleanouts. Cleanouts for building storm drains shall comply with the requirements of Section 719.0 of this code.

  1101.13.1 Rain Leaders and Conductors. Rain leaders and conductors connected to a building storm sewer shall have a cleanout installed at the base of the

  leader or conductor before it connects to the horizontal

  drain.

  1101.14 Rainwater Sumps. Rainwater sumps serving “public use” occupancy buildings shall be provided with dual pumps arranged to function alternately in the case of overload or mechanical failure. Pumps rated 600 V or less shall comply with UL 778 and shall be installed in accordance with the manufacturer’s installation instructions.

  1101.15 Traps on Storm Drains and Leaders. Leaders and storm drains, where connected to a combined sewer, shall be trapped. Floor and area drains connected to a storm drain shall be trapped.

  Exception: Traps shall not be required where roof drains, rain leaders, and other inlets are at locations permitted under Section 906.0, Vent Termination.

  1101.15.1 Where Not Required. No trap shall be required for leaders or conductors that are connected to a sewer carrying storm water exclusively. 1101.15.2 Trap Size. Traps, where installed for individual conductors, shall be the same size as the horizontal drain to which they are connected.

  1101.15.3 Method of Installation of Combined Sewer. Individual storm-water traps shall be installed on the stormwater drain branch serving each storm-water inlet, or a single trap shall be installed in the main storm drain just before its connection with the combined building sewer. Such traps shall be provided with an accessible cleanout on the outlet side of the trap.

• CRC § 610.3 Medium relevance — show source text

  610.3, 610.12.1,

  L 501.0, L 502.0, L 503.0 HOUSE DRAINS . . . . . . . . . . . . . . . . . .(see Building drain) HOUSE SEWERS . . . . . . . . . . . . . . . . .(see Building sewer)

  – I –

  IDENTIFICATION

  Cast-iron soil pipe . . . . . . . . . . . . . . . . . . . . . . . . .701.2 Copper tubing . . . . . . . . . . . . . . . . . . . . . . . . . . . .604.4 Fuel gas piping . . . . . . . . . . . . . . . . . . . . . . . . .1208.7.5 Medical gas and medical vacuum systems . . . . . . . . . . . . . . . . . .1318.5,

  1323.13 – 1323.13.3,

  1323.14, 1323.15 Piping, fittings, traps, and fixtures . . . . . . . . . . . . . .301.2.1 Potable and nonpotable water lines . . . . . . . . . . .615.0 Water, nonpotable and potable . . . . . . . . . . . . . . .601.3

  INCREASERS AND REDUCERS . . . . . . . . . . . . . . . .316.0

  INDIRECT-FIRED WATER HEATERS . . . . . . . .211.0, 505.4,

  603.5.4, 608.7 INDIRECT WASTE . . . . . . . . . . . . . . . . . . . . . . . .Chapter 8 Air gap or break . . . . . . . . . . . . . . . . . . . . . . . . . . .801.2 Appliances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .807.0 Approval required . . . . . . . . . . . . . . . . . . . . . . . . .802.0 Aspirators . . . . . . . . . . . . . . . . . . . . . . .603.5.9, 1303.5

  Chemical wastes . . . . . . . . . . . . . . . . . . . . . . . . . .811.0

  Cleanouts . . . . . . . . . . . . . . . . . . . . . . . . .801.3.2, 803.3

  Clear water wastes . . . . . . . . . . . . . . . . . . . . . . . .812.0

• CRC § 1.11.0. High relevance — show source text

  1 Exception 2_||||X|X|||||||||||||||||||| |1010.2|||||||||||||||||||X|||||| |1010.3|||||||||||||||||||X|||||| |1010.4|||||||||||||||||||X|||||| |1010.5|||||||||||||||||||X|||||| |1014.1A, B, C||||||||||X|X|X|X|X|X|||||||||| |1015.5||||||||||X|X|X|X|X|X|||||||||| |1015.6||||||||||X|X|X|X|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 193

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  194 2025 CALIFORNIA PLUMBING CODE

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  CHAPTER 10

  TRAPS AND INTERCEPTORS

  1001.0 General.

  1001.1 Applicability. This chapter shall govern the materials, design, and installation of traps and interceptors.

  1001.2 Where Required. Each plumbing fixture shall be separately trapped by an approved type of liquid seal trap. This section shall not apply to fixtures with integral traps. Not more than one trap shall be permitted on a trap arm. Food waste disposers installed with a set of restaurant, commercial, or industrial sinks shall be connected to a separate trap.

  Each domestic clothes washer and each laundry sink shall be connected to a separate and independent trap, except that a trap serving a laundry sink shall also be permitted to receive the waste from a clothes washer set adjacent to it.

  The vertical distance between a fixture outlet and the trap weir shall be as short as practicable, but in no case shall the tailpiece exceed 24 inches (610 mm) in length.

  One trap shall be permitted to serve a set of not more than three single compartment sinks or laundry sinks of the same depth or three lavatories immediately adjacent to each other and in the same room where the waste outlets are not more than 30 inches (762 mm) apart, and the trap is centrally located where three compartments are installed.

  1002.0 Traps Protected by Vent Pipes.

  1002.1 Vent Pipes. Each plumbing fixture trap, except as otherwise provided in this code, shall be protected against siphonage, backpressure, and air circulation shall be assured throughout the drainage system using a vent pipe installed in accordance with the requirements of this code.

• CRC § 908.1 Medium relevance — show source text

  908.1 Vertical Wet Venting . . . . . . . . . . .190

  908.2 Horizontal Wet Venting for a Bathroom Group . . . . . . . . . . . . . .191

  909.0 Special Venting for Island Fixtures . . . . . . . . . . . . . . . . . . . . .191

  909.1 General . . . . . . . . . . . . . . . . . . . . .191

  910.0 Combination Waste and Vent

  Systems . . . . . . . . . . . . . . . . . . . .191

  910.1 Where Permitted . . . . . . . . . . . . . .191

  910.2 Approval . . . . . . . . . . . . . . . . . . . .191

  910.3 Vents . . . . . . . . . . . . . . . . . . . . . .191

  910.4 Connections and Size . . . . . . . . .191

  910.5 Vertical Waste Pipe . . . . . . . . . . .191

  910.6 Cleanouts . . . . . . . . . . . . . . . . . . .191

  910.7 Fixtures . . . . . . . . . . . . . . . . . . . . .191

  911.0 Circuit Venting . . . . . . . . . . . . . . .191

  911.1 Circuit Vent Permitted . . . . . . . . .191

  911.2 Circuit Vent Size and

  Connection . . . . . . . . . . . . . . . . . .192

  911.3 Relief Vent . . . . . . . . . . . . . . . . . .192

  911.4 Slope and Size of Horizontal Branch . . . . . . . . . . . . . . . . . . . . .192

  911.5 Additional Fixtures . . . . . . . . . . . .192

  912.0 Engineered Vent System . . . . . . .192

  912.1 General . . . . . . . . . . . . . . . . . . . . .192

  912.2 Minimum Requirements . . . . . . . .192

  CHAPTER 10 TRAPS AND

  INTERCEPTORS . . . . . . . . . . . . .193

  1001.0 General . . . . . . . . . . . . . . . . . . . . .195

  1001.1 Applicability . . . . . . . . . . . . . . . . . .195

  1001.2 Where Required . . . . . . . . . . . . . .195

  1002.0 Traps Protected by Vent Pipes . .195

  1002.1 Vent Pipes . . . . . . . . . . . . . . . . . .195

  1002.2 Fixture Traps . . . . . . . . . . . . . . . .195

  1002.3 Change of Direction . . . . . . . . . . .195

  1002.4 Vent Pipe Opening . . . . . . . . . . . .195

  1003.0 Traps – Described . . . . . . . . . . . .195

  1003.1 General Requirements . . . . . . . . .195

• CRC § 2-8 Medium relevance — show source text

  [RB] CEILING HEIGHT. The clear vertical distance from the finished floor to the finished ceiling.

  [RB] CEMENT PLASTER. A mixture of Portland or blended cement, Portland cement or blended cement and hydrated lime, masonry cement or plastic cement and aggregate and other approved materials as specified in this code.

  [RB] CHANGE OF OCCUPANCY. A change in the use of a building or portion of a building that involves a change in the application of the requirements of this code.

  CHILD CARE. For the purposes of these regulations, child care means the care of children during any period of a 24-hour day where perma- nent sleeping accommodations are not provided. The time-period shall not be more than 24 hours. Note: “Child care” shall not be construed to preclude the use of cots or mats for napping purposes, provided all employees, attendants and staff personnel are awake and on duty in the area where napping occurs.

  CHILD OR CHILDREN. A person or persons under the age of 18 years.

  CHILD-CARE CENTER. Any facility of any capacity other than a large or small family day-care home as defined in these regulations in which less than 24-hour-per-day nonmedical supervision is provided for children in a group setting.

  [MP] CHIMNEY. A primary vertical structure containing one or more flues, for the purpose of carrying gaseous products of combustion and air from a fuel-burning appliance to the outside atmosphere.

  [MP] CHIMNEY CONNECTOR. A pipe that connects a fuel-burning appliance to a chimney.

  [MP] CHIMNEY TYPES.

  Residential-type appliance. An approved chimney for removing the products of combustion from fuel-burning, residential-type appliances producing combustion gases not in excess of 1,000°F (538°C) under normal operating conditions, and capable of producing combustion gases of 1,400°F (760°C) during intermittent forces firing for periods up to 1 hour. All temperatures shall be measured at the appliance flue outlet. Residential-type appliance chimneys include masonry and factory-built types.

  2-8 2025 CALIFORNIA RESIDENTIAL CODE

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

  DEFINITIONS

  CHRONICALLY ILL. See “TERMINALLY ILL.”

  [MP] CIRCUIT VENT. A vent that connects to a horizontal drainage branch and vents two traps to not more than eight traps or trapped fixtures connected into a battery.

  [MP] CIRCULATING HOT WATER SYSTEM. A specifically designed water distribution system where one or more pumps are operated in the service hot water piping to circulate heated water from the water-heating equipment to fixtures and back to the water-heating equipment.

  [RB] CLADDING. The exterior materials that cover the surface of the building envelope that is directly loaded by the wind.

  [MP] CLEANOUT. An access opening in the drainage system utilized for the removal of obstructions. Types of cleanouts include a removable plug or cap, and a removable fixture or fixture trap.

  [RE] CLIMATE ZONE. A geographical region based on climatic criteria as specified in this code.

  [RB] CLOSET. A small room or chamber used for storage.

• CRC § 310.5 Medium relevance — show source text

  310.5 Obstruction of Flow. No fitting, fixture and piping connection, appliance, device, or method of installation that obstructs or retards the flow of water, wastes, sewage, or air in the drainage or venting systems, in an amount exceeding the normal frictional resistance to flow, shall be used unless it is indicated as acceptable in this code or is approved in accordance with Section 301.2 of this code. The enlargement of a 3 inch (80 mm) closet bend or stub to 4 inches (100 mm) shall not be considered an obstruction.

  310.6 Dissimilar Metals. Except for necessary valves, where intermembering or mixing of dissimilar metals occurs, the point of connection shall be confined to exposed or accessible locations.

  310.7 Direction of Flow. Valves, pipes, and fittings shall be installed in correct relationship to the direction of flow.

  310.8 Screwed Fittings. Screwed fittings shall be ABS, cast-iron, copper, copper alloy, malleable iron, PVC, steel, or other approved materials. Threads shall be tapped out of solid metal or molded in solid ABS or PVC.

  2025 CALIFORNIA PLUMBING CODE 51

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  GENERAL REGULATIONS

  310.9 Female Plastic Connections. Female plastic tapered (NPT) threaded connections shall not be allowed to be used when threaded onto a male metallic connection.

  Exception: Female plastic parallel (straight) threaded connections shall be permitted. 310.10 ABS and PVC Transition Joints. Except as provided in Section 705.9.4, PVC and ABS pipe and fittings shall not be solvent welded to dissimilar material.

  310.11 [OSHPD 1, 2, 3, 4 & 5] Drainage piping over oper- ating and delivery rooms, nurseries, food preparation cen- ters, food-serving facilities, food storage areas, compounding ante and buffer rooms and other sensitive areas shall be kept to a minimum and shall not be exposed. Special precautions shall be taken to protect these areas from possible leakage from necessary overhead drainage piping systems. Piping over switchboards, panel boards, and motor control centers are subject to restrictions of the California Electrical Code where applicable. 310.12 [OSHPD 1, 3, 4 & 5] Floor drains, waste traps, san- itary drainage cleanouts and handwashing fixtures shall not be installed in operating and delivery rooms. Floor drains with self-priming traps may be installed in cystoscopic rooms. Floor drains shall not be installed in compounding buffer or

  ante rooms.

• CRC § 3.1 Medium relevance — show source text

  10|23/4| |F/C-6-RC-25|6″|6″ deep (4800 psi) concrete deck;1/4″ rein-
  forcement bars at 71/2″ pitch with7/8″
  cover;3/8″ main reinforcement bars at
  31/2″ pitch perpendicular with7/8″ cover;
  13′1″ span restrained.|195
  psf|4 hrs|||7|1, 7|4| |F/C-6-RC-26|6″|6″ (4650 psi) concrete deck;1/4″ reinforce-
  ment bars at 71/2″ pitch with7/8″ cover;3/8″
  main reinforcement bars at 31/2″ pitch
  perpendicular with1/2″ cover; 13′1″ span
  restrained.|195
  psf|2 hrs
  23 min|||7|1, 2|21/4| |F/C-6-RC-27|6″|6″ deep (6050 psi) concrete deck;1/4″ rein-
  forcement bars at 71/2″ pitch with7/8″
  cover;3/8″ reinforcement bars at 31/2″
  pitch perpendicular with1/2″ cover; 13′1″
  span restrained.|195
  psf|3 hrs
  30 min|||7|1, 10|31/2| |F/C-6-RC-28|6″|6″ deep (5180 psi) concrete deck;1/4″ rein-
  forcement bars at 8″ pitch with3/4″ cover;
  1/4″ reinforcement bars at 51/2″ pitch
  perpendicular with1/2″ cover; 13′1″ span
  restrained.|150
  psf|4 hrs|||7|1, 7|4|

  2025 CALIFORNIA EXISTING BUILDING CODE RESOURCE A-93

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

  RESOURCE A—GUIDELINES ON FIRE RATINGS OF ARCHAIC MATERIALS AND ASSEMBLIES

  TABLE 3.1—continued FLOOR/CEILING ASSEMBLIES—REINFORCED CONCRETE	Col2	Col3	Col4	Col5	Col6	Col7	Col8	Col9	Col10
  ITEM CODE	ASSEMBLY THICKNESS	CONSTRUCTION DETAILS	PERFORMANCE	PERFORMANCE	REFERENCE NUMBER	REFERENCE NUMBER	REFERENCE NUMBER	NOTES	REC. HOURS
  ITEM CODE	ASSEMBLY THICKNESS	CONSTRUCTION DETAILS	LOAD	TIME	PRE-BMS-92	BMS-92	POST-BMS-92	POST-BMS-92	POST-BMS-92
  F/C-6-RC-29	6″	6″ thick (4180 psi) concrete deck; 4″ × 3″ × 10 lbs R.S.J.; 2′6″ C.R.S.

• CRC § 0.26 Medium relevance — show source text

  [RE] FENESTRATION, VERTICAL. Windows that are fixed or movable, opaque doors, glazed doors, glazed block and combination opaque and glazed doors installed in a wall at less than 15 degrees (0.26 rad) from vertical.

  [RB] FIBER-CEMENT (BACKERBOARD, SIDING, SOFFIT, TRIM AND UNDERLAYMENT) PRODUCTS. Manufactured thin section composites of hydraulic cementitious matrices and discrete nonasbestos fibers.

  [RB] FIRE SEPARATION DISTANCE. The distance measured from the building face to one of the following:

  1. To the closest interior lot line.

  2. To the centerline of a street, an alley or public way.

  3. To an imaginary line between two buildings or townhouse units on the lot.

  The distance shall be measured at a right angle from the face of the wall.

  [RB] FIREBLOCKING. Building materials or materials approved for use as fireblocking, installed to resist the free passage of flame to other areas of the building through concealed spaces.

  2-12 2025 CALIFORNIA RESIDENTIAL CODE

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

  DEFINITIONS

  [RB] FIREPLACE. An assembly consisting of a hearth and fire chamber of noncombustible material and provided with a chimney, for use with solid fuels.

  Factory-built fireplace. A listed and labeled fireplace and chimney system composed of factory-made components, and assembled in the field in accordance with manufacturer’s instructions and the conditions of the listing.

  Masonry fireplace. A field-constructed fireplace composed of solid masonry units, bricks, stones or concrete.

  [MP] FIREPLACE STOVE. A free-standing, chimney-connected solid-fuel-burning heater designed to be operated with the fire chamber doors in either the open or closed position.

  [RB] FIREPLACE THROAT. The opening between the top of the firebox and the smoke chamber.

  [RB] FIRE-RETARDANT-TREATED WOOD. Wood products that, when impregnated with chemicals by a pressure process or other means during manufacture, exhibit reduced surface burning characteristics and resist propagation of fire.

  [MP] FIXTURE. See “Plumbing fixture.”

  [MP] FIXTURE BRANCH, DRAINAGE. A drain serving two or more fixtures that discharges into another portion of the drainage system.

  [MP] FIXTURE BRANCH, WATER-SUPPLY. A water-supply pipe between the fixture supply and a main water-distribution pipe or fixture group main.

  [MP] FIXTURE DRAIN. The drain from the trap of a fixture to the junction of that drain with any other drain pipe.

  [MP] FIXTURE FITTING.

  Supply fitting. A fitting that controls the volume or directional flow or both of water and that is either attached to or accessed from a fixture or is used with an open or atmospheric discharge.

  Waste fitting. A combination of components that conveys the sanitary waste from the outlet of a fixture to the connection of the sanitary drainage system.

  [MP] FIXTURE GROUP, MAIN. The main water-distribution pipe (or secondary branch) serving a plumbing fixture grouping such as a bath, kitchen or laundry area to which two or more individual fixture branch pipes are connected.

  [MP] FIXTURE SUPPLY. The water-supply pipe connecting a fixture or fixture fitting to a fixture branch.

• CRC § 1220.4.2 Medium relevance — show source text

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

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  Uniform Mechanical Code – 2024 Edition:

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• CRC § 2.2. Medium relevance — show source text

  2.2. Loss of power or circuit continuity to the electronic monitoring device shall initiate a trouble signal. 2.3. The extinguishers shall be installed inside of a building or cabinet in a noncorrosive environment. 2.4. Electronic monitoring devices and supervisory circuits shall be tested every 3 years when extinguisher maintenance is performed. 2.5. A written log of required hydrostatic test dates for extinguishers shall be maintained by the owner to verify that hydrostatic tests are conducted at the frequency required by California Code of Regulations, Title 19, Division 1, Chapter 3. 3. In Group I-3, and in mental health areas of Group I-2, portable fire extinguishers shall be permitted to be located at staff locations.

  [California Code of Regulations, Title 19, Division 1, §565.1(a) through (c)] Classification of Hazards.

  (a) Light (Low) Hazard. Locations where the total amounts of Class A combustible materials, including furnishings, decorations and contents, is of minor quantity. These shall include buildings or rooms occupied as offices, classrooms, churches, assembly halls, etc. This classification anticipates that the majority of the contents are either noncombustible or so arranged that a fire is not likely to spread rapidly. Small amounts of Class B flammables used for duplicating machines, art departments, etc., are included provided that they are kept in closed containers and safely stored.

  (b) Ordinary (Moderate) Hazard. Locations where the total amounts of Class A combustibles and Class B flammables are present in greater amounts than expected under Light (Low) Hazard occupancies. These occupancies could consist of offices, classrooms, mercantile shops and allied storage, light manufacturing, research operations, auto showrooms, parking garages, workshop or support service areas of Light (Low) Hazard occupancies, and warehouses containing Class I or Class II commodities.

  (c) Extra (High) Hazard. Locations where the total amount of Class A combustibles and Class B flammables are present, in storage, production use, and/or finished product over and above those expected and classed as Ordinary (Moderate) Hazards. These occupan- cies could consist of woodworking, vehicle repair, aircraft and boat servicing, individual product display showrooms, product convention center displays, storage and manufacturing processes such as painting, dipping, coating, including flammable liquid handling. Also, included in warehousing of, or in-process storage of other Class I and Class II commodities.

  [California Code of Regulations, Title 19, Division 1, §565.2(a) through (e)] Selection by Hazard.

  (a) Extinguishers shall be selected for the specific class or classes of hazards to be protected in accordance with the following subdivi- sions (b), (c), (d) and (e).

  (b) Extinguishers for protecting Class A hazards shall be selected from the following: Water-type, halogenated agent types, multipur- pose dry chemical and wet chemical type.

  (c) Extinguishers for protection of Class B hazards shall be selected from the following: carbon dioxide, dry chemical types, haloge- nated agent types and water-type and water chemical extinguishers rated for Class B hazards.

  2025 CALIFORNIA FIRE CODE 9-33

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

  FIRE PROTECTION AND LIFE SAFETY SYSTEMS

• CRC § 422.1 Medium relevance — show source text

  and two family
  dwelling|––|1 per one and two family
  dwelling|1 per one and two family
  dwelling|1 per one
  and two
  family
  dwelling|––|1 kitchen
  sink and
  1 automatic
  clothes washer
  connection per
  one and two
  family
  dwelling| |R-4 Residential occu-
  pancy (residential care or
  assisted living)|R-4 Residential occu-
  pancy (residential care or
  assisted living)|Male
  1 per 10|Female
  1 per 8|––|Male
  1 per 12|Female
  1 per 12|1 per 8|1 per 150|1 service
  sink or
  laundry sink| |R-4 Residential occu-
  pancy (residential care or
  assisted living)|R-4 Residential occu-
  pancy (residential care or
  assisted living)|Add 1 fixture for each
  additional 25 males and 1
  fixture for each additional
  20 females.|Add 1 fixture for each
  additional 25 males and 1
  fixture for each additional
  20 females.|Add 1 fixture for each
  additional 25 males and 1
  fixture for each additional
  20 females.|Add 1 fixture for each
  additional 20 males and 1
  fixture for each additional
  15 females.|Add 1 fixture for each
  additional 20 males and 1
  fixture for each additional
  15 females.|Add 1 fixture for each
  additional 20 males and 1
  fixture for each additional
  15 females.|Add 1 fixture for each
  additional 20 males and 1
  fixture for each additional
  15 females.|Add 1 fixture for each
  additional 20 males and 1
  fixture for each additional
  15 females.|

  2025 CALIFORNIA PLUMBING CODE 73

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  PLUMBING FIXTURES AND FIXTURE FITTINGS

  TABLE 422.1

  Col1	MINIMUM	Col3	PLUMBING F	FACILITIES1 (continued)	Col6	Col7	Col8	Col9
  TYPE OF OCCUPANCY2	WATER CLOSETS (FIXTURES PER PERSON)3	WATER CLOSETS (FIXTURES PER PERSON)3	URINALS (FIXTURES PER PERSON)4	LAVATORIES (FIXTURES PER PERSON)5	LAVATORIES (FIXTURES PER PERSON)5	BATHTUBS OR SHOWERS (FIXTURES PER PERSON)	DRINKING FOUNTAINS/ FACILITIES (FIXTURES PER PERSON)	OTHER6, 7
  **S-1,

• CRC § 12.2 Medium relevance — show source text

  R506.2

  SBCA Structural Building Components Association 6300 Enterprise Lane Madison, WI 53719

  BCSI—2018: Building Component Safety Information—Guide to Good Practice for Handling, Installing, Restraining & Bracing of Metal Plate Connected Wood Trusses

  R502.12.2, R802.10.3

  CFS-BCSI—(updated June 2016): Cold-formed Steel Building Component Safety Information (CFSBCSI)—Guide to Good Practice for Handling, Installing & Bracing of Cold-formed Steel Trusses

  R505.1.3, R804.3.6

  SFM State of California Department of Forestry and Fire Protection, Office of the State Fire Marshal, P.O. Box 944246, Sacramento, CA

  944246-2460

  SFM—12-3: Releasing Systems for Security Bars in Dwellings

  SFM 12-7A-1: Exterior Wall Siding and Sheathing

  SFM 12-7A-2: Exterior Window

  SFM 12-7A-3: Horizontal Protection Underside

  SFM 12-7A-4: Decking

  SFM 12-7A-4A: Decking Alternate Method A

  (The Office of the State Fire Marshal standards referred to above are found in the California Code of Regulations, Title 24, Part 12.)

  TMS The Masonry Society 105 South Sunset Street, Suite Q Longmont, CO 80501

  402—2022: Building Code Requirements for Masonry Structures

  R404.1.2, R606.1, R606.1.1, R606.12.1, R606.12.2.3.1, R606.12.3.1, R703.12,

  403—2017: Direct Design Handbook for Masonry Structures

  R606.1, R606.1.1, R606.12.1, R606.12.3.1

  404—2023: Standard for the Design of Architectural Cast Stone

  R606.1

  602—2022: Specification for Masonry Structures

  R606.2.10, R606.2.13, R703.12

  TPI Truss Plate Institute 2670 Crain Highway, Suite 203 Waldorf, MD 20601

  ANSI/TPI 1—2022: National Design Standard for Metal Plate Connected Wood Truss Construction

  R502.12.1, R802.10.2

  2025 CALIFORNIA RESIDENTIAL CODE 44-19

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

  REFERENCED STANDARDS

  UBC International Code Council, Inc. 500 New Jersey Avenue, NW 6th Floor Washington, DC 20001

  UBC Standard 15-2: Test Standard for Determining the Fire Retardancy of Roof-covering Materials

  R902

  UBC Standard 15-3: Wood Shakes

  R902

  UBC Standard 15-4: Wood Shingles

  R902

  UL UL LLC 333 Pfingsten Road Northbrook, IL 60062

  55A—2004: Materials for Built-Up Roof Coverings

  R905.9.2

• CRC § 422.1 Medium relevance — show source text

  add 1 fixture for
  each additional 500 males
  and 1 fixture for each 200
  females.|Over 400, add 1 fixture for
  each additional 500 males
  and 1 fixture for each 200
  females.|Over 400,
  add 1 fixture
  for each
  additional
  500 males.|Over 400, add 1 fixture for
  each additional 500 males
  and 1 fixture for each 400
  females.|Over 400, add 1 fixture for
  each additional 500 males
  and 1 fixture for each 400
  females.|––|Over 750,
  add 1 fixture
  for each
  additional
  500 persons.|––|

  72 2025 CALIFORNIA PLUMBING CODE

  ), 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 422.1

  Col1	Col2	MINIMUM	Col4	PLUMBING F	FACILITIES1 (continued)	Col7	Col8	Col9	Col10
  TYPE OF OCCUPANCY2	TYPE OF OCCUPANCY2	WATER CLOSETS (FIXTURES PER PERSON)3	WATER CLOSETS (FIXTURES PER PERSON)3	URINALS (FIXTURES PER PERSON)4	LAVATORIES (FIXTURES PER PERSON)5	LAVATORIES (FIXTURES PER PERSON)5	BATHTUBS OR SHOWERS (FIXTURES PER PERSON)	DRINKING FOUNTAINS/ FACILITIES (FIXTURES PER PERSON)	OTHER6, 7
  R-1 Residential occu- pancy (minimal stay)- hotels, motels, bed and breakfast homes	R-1 Residential occu- pancy (minimal stay)- hotels, motels,

• CRC § 610.5 Medium relevance — show source text

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

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

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

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

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

  610.10 Sizing for Flushometer Valves . . .157

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

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

  Table 610.4 Fixture Unit Table for

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

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

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

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

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

  611.1 Application . . . . . . . . . . . . . . . . . .160

  611.2 Air Gap Discharge . . . . . . . . . . . .160

  611.3 Connection Tubing . . . . . . . . . . . .160

  611.4 Sizing of Residential Softeners . . .160

  612.0 Residential Fire Sprinkler Systems . . . . . . . . . . . . . . . . . . . .160

  612.1 Installation . . . . . . . . . . . . . . . . . .160

  Table 611.1 Drinking Water Treatment Units . . . . . . . . . . . . . . . . . . . . . . .161

  Table 611.4 Sizing of Residential Water Softeners . . . . . . . . . . . . . . . . . . .161

  613.0 Domestic Hot-Water Distribution Systems for Health Facilities and Clinics . . . . . . . . . . . . . . . . . .161

  Table 613.1 Hot Water Use . . . . . . . . . . . . . . . . .161

  614.0 Dialysis Water-Distribution Systems . . . . . . . . . . . . . . . . . . . . . .162

  615.0 Identification of Potable and

  Nonpotable Water Lines . . . . . . . . .162

  615.1 Uses Not Permitted . . . . . . . . . . . . .162

  616.0 Emergency Water Supply . . . . . . . .162

  CHAPTER 7 SANITARY DRAINAGE . . . . . . . .163

  PART I Drainage Systems . . . . . . . . . . .165

• CRC § 0.0 Medium relevance — show source text

  0|0.0|6.0| |14|Other Fixture 3|0|0.0|0.0|6.0| |Total Number of Fixtures|Total Number of Fixtures|6||RESET|RUN WATER DEMAND
  CALCULATOR| |99th Percentile Demand Flow =|99th Percentile Demand Flow =|8.5 GPM||||

  For SI units: 1 gallon per minute = 0.66 L/s, 1 gallon = 3.785 L

  M 102.8 Examples Illustrating Use of Water Demand Calculator with Appendix A.

  Example 1: Indoor Water Use Only – Use the information given below to find the pipe size for the building supply to a residential building with six indoor fixtures as shown in Figure 1 [Pipe Section 4].

  Given Information:	Col2	Col3	Col4
  Type of construction:	Residential, one-bathroom	Friction loss per 100 ft (30 480 mm):	15 psi (103 kPa)
  Type of pipe material:	L-copper	Maximum velocity:	10 ft/s (3.05 m/s)
  Fixture number/type:	1 combination bath/shower 1 kitchen faucet 1 lavatory faucet 1 dishwasher 1 WC 1 clothes washer	1 combination bath/shower 1 kitchen faucet 1 lavatory faucet 1 dishwasher 1 WC 1 clothes washer	1 combination bath/shower 1 kitchen faucet 1 lavatory faucet 1 dishwasher 1 WC 1 clothes washer

  Solution: Step 1 of 2 – Find Demand Load for the Build- ing Supply.

  The Water Demand Calculator [WDC] in Figure 2 is used to determine the demand load expected from indoor water use. The WDC has white-shaded cells and light gray-shaded cells. The values in the light gray cells are derived from a national survey of indoor water use at homes with efficient fixtures and cannot be changed.

  The white-shaded cells accept input from the designer. For instance, fixture counts from the given information are entered in Column [B]; the corresponding recommended fixture flow rates are already provided in Column [D]. The flow rates in Column [D] may be reduced only if the manufacturer specifies a lower flow rate for the fixture. Column [E] establishes the upper limits for the flow rates entered into Column

  [D]. Clicking the Run Water Demand Calculator button gives 8.5 gpm (0.54 L/s) as the estimated indoor water demand for the whole building. This result appears in the dark gray box FIGURE 1 of the WDC in Figure 2. RESIDENTIAL BUILDING WITH SIX INDOOR FIXTURES

  520 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 M

  [A] FIXTURE	Col2	[B] ENTER NUMBER OF FIXTURES	[C] PROBABILITY OF USE (%)	[D] ENTER FIXTURE FLOW RATE (GPM)	[E] MAXIMUM RECOMMENDED FIX- TURE FLOW RATE (GPM)
  1	Bar Sink	0	2.0	1.5	1.5
  2	Bathtub	0	1.0	5.5	5.

• CRC § 903.2.7 Medium relevance — show source text

  Mercantile 903.2.7

  Residential 903.2.8

  Storage 903.2.9, 903.2.10 Fire Barriers 707

  Continuity 707.5, 713.5 Exterior walls Table 705.5, 707.4,

  713.6 Fire-resistance rating of walls 603.1, 703, 707.3, 713.4 Glazing, rated 716.3.4 Incidental 509.4.1

  Inspection 110.3.8 Joints 707.8, 713.9, 715, 2508.5 Marking 703.5 Materials 707.2, 713.3 Opening protection 707.6, 707.10, 713.7, 713.10, 714.4, 716, 717.5.2 Penetrations 707.7, 713.8 Shaft enclosure 713.1

  Special provisions Aircraft hangars 412.3.4, 412.4.1 Atriums 404.3, 404.6 Covered and open mall buildings 402.4.2

  Fire pumps 403.3.4, 913.2.1 Flammable finishes 416.2

  Group H-2 415.9.1.2, 426.1.2 Group H-3 and H-4 415.10 Group H-5 415.11.1.2, 415.11.1.5, 415.11.6.1, 415.11.7.4 Group I-3 408.5, 408.7 Hazardous materials 414.2.1 Higher education laboratories 428.3 High-rise 403.2.1.2, 403.2.2, 403.3, 403.4.8.1

  Organic coating 418.4, 418.5, 418.6 Stages and platforms 410.5.1, 410.5.2

  Fire Command Center 403.4.6, 412.2.3.2, 911, 3007.7, 3008.6.6, 3008.7 Fire Dampers 717.2, 717.3, 717.4, 717.5 Fire Department (see Emergency Responders) Fire Detection System (see Fire Alarm and Smoke Detection Systems) Fire District Appendix D Fire Door (see Opening Protectives) 716, 1023.4 Fire Escape 412.7.3 Fire Extinguishers, Portable 906, 3309 Fire Extinguishing Systems 416.5, 417.4, 903, 904 Fire Partition 708

  Continuity 708.4 Elevator door protection 3006 Exterior walls Table 705.5, 708.5

  Fireblocks and draftstops 708.4.3 Fire-resistance rating 603.1, 703, 708.3 Glazing, rated 716.3.4 Inspection 110.3.8 Joint treatment gypsum 2508.5 Joints 708.8, 715 Marking 703.5 Materials 708.2

  Opening protection 708.5, 714.4, 716, 717.5.4

• CRC § 6.4 Medium relevance — show source text

  6.4_|||X|||||||||||||||||||||| |907.2.6.5|||X|||||||||||||||||||||| |907.2.9|||X|||||||||||||||||||||| |907.2.9.1|||X|||||||||||||||||||||| |907.2.9.3|||X|||||||||||||||||||||| |907.2.9.4|||X|||||||||||||||||||||| |907.2.9.4.1|||X|||||||||||||||||||||| |907.2.10|||X|||||||||||||||||||||| |907.2.11|||X|||||||||||||||||||||| |907.2.11.1|||X|||||||||||||||||||||| |907.2.11.2|||X|||||||||||||||||||||| |907.2.11.2.1 – 907.2.11.2.6|||X|||||||||||||||||||||| |907.2.11.3|||X|||||||||||||||||||||| |907.2.11.4|||X|||||||||||||||||||||| |907.2.11.6|||X|||||||||||||||||||||| |907.2.11.8|||X|||||||||||||||||||||| |907.2.11.9|||X|||||||||||||||||||||| |907.2.12|||X|||||||||||||||||||||| |907.2.13|||X|||||||||||||||||||||| |907.2.13.1|||X|||||||||||||||||||||| |907.2.13.1.2|||X|||||||||||||||||||||| |907.2.24 with subsections|||X|||||||||||||||||||||| |907.2.25 with subsections|||X|||||||||||||||||||||| |907.2.26 with subsections|||X|||||||||||||||||||||| |907.2.27|||X||||||||||||||||||||||

  2025 CALIFORNIA BUILDING CODE 9-3

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

  CALIFORNIA BUILDING CODE – MATRIX ADOPTION TABLE

  CHAPTER 9 – FIRE PROTECTION AND LIFE SAFETY SYSTEMS—continued

• California Residential Code Medium relevance — show source text

  or
  laundry sink| |R-3 Residential occu-
  pancy (long-term or per-
  manent in nature) for
  more than 5 but does not
  exceed 16 occupants)|R-3 Residential occu-
  pancy (long-term or per-
  manent in nature) for
  more than 5 but does not
  exceed 16 occupants)|Add 1 fixture for each
  additional 25 males and 1
  fixture for each additional
  20 females.|Add 1 fixture for each
  additional 25 males and 1
  fixture for each additional
  20 females.|Add 1 fixture for each
  additional 25 males and 1
  fixture for each additional
  20 females.|Add 1 fixture for each
  additional 20 males and 1
  fixture for each additional
  15 females.|Add 1 fixture for each
  additional 20 males and 1
  fixture for each additional
  15 females.|Add 1 fixture for each
  additional 20 males and 1
  fixture for each additional
  15 females.|Add 1 fixture for each
  additional 20 males and 1
  fixture for each additional
  15 females.|Add 1 fixture for each
  additional 20 males and 1
  fixture for each additional
  15 females.| |R-3 Residential occu-
  pancy (one and two fam-
  ily dwellings)|R-3 Residential occu-
  pancy (one and two fam-
  ily dwellings)|1 per one and two family
  dwelling|1 per one and two family
  dwelling|––|1 per one and two family
  dwelling|1 per one and two family
  dwelling|1 per one
  and two
  family
  dwelling|––|1 kitchen
  sink and
  1 automatic
  clothes washer
  connection per
  one and two
  family
  dwelling| |R-4 Residential occu-
  pancy (residential care or
  assisted living)|R-4 Residential occu-
  pancy (residential care or
  assisted living)|Male
  1 per 10|Female
  1 per 8|––|Male
  1 per 12|Female
  1 per 12|1 per 8|1 per 150|1 service
  sink or
  laundry sink| |R-4 Residential occu-
  pancy (residential care or
  assisted living)|R-4 Residential occu-
  pancy (residential care or
  assisted living)|Add 1 fixture for each
  additional 25 males and 1
  fixture for each additional
  20 females.|Add 1 fixture for each
  additional 25 males and 1
  fixture for each additional
  20 females.|Add 1 fixture for each
  additional 25 males and 1
  fixture for each additional
  20 females.|Add 1 fixture for each
  additional 20 males and 1
  fixture for each additional
  15 females.|Add 1 fixture for each
  additional 20 males and 1
  fixture for each additional
  15 females.|Add 1 fixture for each
  additional 20 males and 1
  fixture for each additional
  15 females.

• CRC § 904.3.1 Medium relevance — show source text

  10|||X|||||||||||||||||||||| |904.3.1||||X||X||||||||||||||||||| |904.5|||X|||||||||||||||||||||| |904.6|||X|||||||||||||||||||||| |904.7|||X|||||||||||||||||||||| |904.8|||X|||||||||||||||||||||| |904.9|||X|||||||||||||||||||||| |904.10|||X|||||||||||||||||||||| |904.11.3|||X|||||||||||||||||||||| |904.14|||X|||||||||||||||||||||| |904.15|||X|||||||||||||||||||||| |905.1|||X|||||||||||||||||||||| |905.2|||X|||||||||||||||||||||| |905.3|||X|||||||||||||||||||||| |905.3.1|||X|||||||||||||||||||||| |905.3.8|||X|||||||||||||||||||||| |905.3.8.1|||X|||||||||||||||||||||| |905.3.8.2|||X|||||||||||||||||||||| |905.3.9|||X|||||||||||||||||||||| |905.3.10|||X|||||||||||||||||||||| |905.4|||X|||||||||||||||||||||| |905.5|||X|||||||||||||||||||||| |905.7.2|||X|||||||||||||||||||||| |906.1|||X|||||||||||||||||||||| |906.2|||X|||||||||||||||||||||| |Table 906.3(1)|||X|||||||||||||||||||||| |Table 906.3(2)|||X|||||||||||||||||||||| |906.3.2|||X|||||||||||||||||||||| |906.3.4|||X|||||||||||||||||||||| |907.1.2|||X|||||||||||||||||||||| |907.1.3|||X|||||||||||||||||||||| |907.1.4|||X|||||||||||||||||||||| |907.1.5|||X|||||||||||||||||||||| |907.2|||X|||||||||||||||||||||| |907.2.1|||X|||||||||||||||||||||| |907.2.1.1|||X|||||||||||||||||||||| |907.2.1.3|||X|||||||||||||||||||||| |907.2.2|||X|||||||||||||||||||||| |907.2.2.3|||X|||||||||||||||||||||| |907.2.3|||X|||||||||||||||||||||| |907.2.3.1|||X|||||||||||||||||||||| |907.2.3.2|||X|||||||||||||||||||||| |907.2.3.3|||X||||||||||||||||||||||

  9-2 2025 CALIFORNIA BUILDING CODE

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

  CALIFORNIA BUILDING CODE – MATRIX ADOPTION TABLE

  CHAPTER 9 – FIRE PROTECTION AND LIFE SAFETY SYSTEMS—continued

• California Residential Code Medium relevance — show source text

  |100 psf|1 hr
  23 min|||7|1, 2|11/3| |F/C-4-RC-9|4″|4″ deep (4370 psi);1/4″ reinforcement bars
  at 6″ pitch with3/4″ cover;1/4″ main rein-
  forcement bars at 4″ pitch perpendicular
  with1/2″ cover; 13′1″ span restrained.|150 psf|2 hrs|||7|1, 3|2| |F/C-4-RC-10|4″|4″ thick (5140 psi) deck;1/4″ reinforce-
  ment bars at 71/2″ pitch with7/8″ cover;3/8″
  main reinforcement bars at 33/4″ pitch
  perpendicular with1/2″ cover; 13′1″ span
  restrained.|140 psf|1 hr
  16 min|||7|1, 5|11/4| |F/C-4-RC-11|4″|4″ thick (4000 psi) concrete deck;
  3″ × 11/2″ × 4 lbs R.S.J.; 2′6″ C.R.S.; flush
  with top surface; 4″ × 6″ x 13 SWG mesh
  reinforcement 1″ from bottom of slab; 6′6″
  span restrained.|150 psf|2 hrs|||7|1, 3|2| |F/C-4-RC-12|4″|4″ deep (2380 psi) concrete deck;
  3″ × 11/2″ × 4 lbs R.S.J.; 2′6″ C.R.S.; flush
  with top surface; 4″ × 6″ x 13 SWG mesh
  reinforcement 1″ from bottom surface;
  6′6″ span restrained.|150 psf|1 hr
  3 min|||7|1, 2|1| |F/C-4-RC-13|41/2″|41/2″ thick (5200 psi) deck;1/4″ reinforce-
  ment bars at 71/4″ pitch with7/8″ cover;3/8″
  main reinforcement bars at 33/4″ pitch
  perpendicular with1/2″ cover; 13′1″ span
  restrained.|140 psf|2 hrs|||7|1, 3|2| |F/C-4-RC-14|41/2″|41/2″ deep (2525 psi) concrete deck;1/4″
  reinforcement bars at 71/2″ pitch with7/8″
  cover;3/8″ main reinforcement bars at
  33/8″ pitch perpendicular with1/2″ cover;
  13′1″ span restrained.|150 psf|42 min|||7|1, 5|2/3| |F/C-4-RC-15|41/2″|41/2″ deep (4830 psi) concrete deck;
  11/2″ × No.

• CRC § 1305.2.3.3 Medium relevance — show source text

  2, 1305.2.3.3, 1305.2.4.1, 1305.2.5, 1305.2.5.1, 1305.2.6, 1305.2.7.1, 1305.2.8, 1305.2.9, 1305.2.9.1, 1305.2.10, 1305.2.10.1, 1305.2.11, 1305.2.11.1, 1305.2.12.1, 1305.2.13, Table 1305.2.15, 1305.2.15.1, 1305.2.16.1, 1305.2.17, 1305.2.17.1, 1305.2.18, 1305.2.18.1, 1305.2.19, Table 1305.2.19, 1305.2.20, 1305.2.20.1, 1307.1.1, 1401.2, 1402.1, 1402.2, 1402.2.1, 1402.3, 1402.4, 1402.5, 1402.6, 1501.5, 1504.1.1, 1504.1.4.1, 1504.1.7, 1509.1, 1509.3, 1510.1

  CEC — 25 : California Energy Code

  302.2, 702.7, 708.1, 809.1, 907.1, 1104.1

  CFC—25: California Fire Code

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

  CMC—25: California Mechanical Code

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

  CPC—25: California Plumbing Code

  302.2, 408.1, 702.7, 1009.1, 1009.2, 1009.3, 1009.5, 1302.1.6, 1503.1

• CRC § 8.5 Medium relevance — show source text

  The white-shaded cells accept input from the designer. For instance, fixture counts from the given information are entered in Column [B]; the corresponding recommended fixture flow rates are already provided in Column [D]. The flow rates in Column [D] may be reduced only if the manufacturer specifies a lower flow rate for the fixture. Column [E] establishes the upper limits for the flow rates entered into Column

  [D]. Clicking the Run Water Demand Calculator button gives 8.5 gpm (0.54 L/s) as the estimated indoor water demand for the whole building. This result appears in the dark gray box FIGURE 1 of the WDC in Figure 2. RESIDENTIAL BUILDING WITH SIX INDOOR FIXTURES

  520 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 M

  [A] FIXTURE	Col2	[B] ENTER NUMBER OF FIXTURES	[C] PROBABILITY OF USE (%)	[D] ENTER FIXTURE FLOW RATE (GPM)	[E] MAXIMUM RECOMMENDED FIX- TURE FLOW RATE (GPM)
  1	Bar Sink	0	2.0	1.5	1.5
  2	Bathtub	0	1.0	5.5	5.5
  3	Bidet	0	1.0	2.0	2.0
  4	Clothes Washer	1	5.5	3.5	3.5
  5	Combination Bath/Shower	1	5.5	5.5	5.5
  6	Dishwasher	1	0.5	1.3	1.3
  7	Kitchen Faucet	1	2.0	2.2	2.2
  8	Laundry Faucet	0	2.0	2.0	2.0
  9	Lavatory Faucet	1	2.0	1.5	1.5
  10	Shower, per head	0	4.5	2.0	2.0
  11	Water Closet, 1.28 GPF Gravity Tank	1	1.0	3.0	3.0
  12	Other Fixture 1	0	0.0	0.0	6.0
  13	Other Fixture 2	0	0.0	0.0	6.0
  14	Other Fixture 3	0	0.0	0.0	6.0
  Total Number of Fixtures	Total Number of Fixtures	6		RESET	RUN WATER DEMAND CALCULATOR
  99th Percentile Demand Flow =	99th Percentile Demand Flow =	8.5 GPM

  For SI units: 1 gallon per minute = 0.66 L/s, 1 gallon = 3.785 L

  FIGURE 2 WATER DEMAND CALCULATOR FOR INDOOR USE AT HOME WITH SIX EFFICIENT FIXTURES (EXAMPLE 1)

  Solution: Step 2 of 2 – Determine the Pipe Size of the Building Supply.

• CRC § 6.3.1. Medium relevance — show source text

  6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.| |130|0-60|The fastening system shall resist the wind forces in Section 1609.6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.| |All|> 60|The fastening system shall resist the wind forces in Section 1609.6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.| |INTERLOCKING CLAY OR CONCRETE ROOF TILE WITH PROJECTING ANCHOR LUGSd, e
  (Installations on spaced/solid sheathing with battens or spaced sheathing)|INTERLOCKING CLAY OR CONCRETE ROOF TILE WITH PROJECTING ANCHOR LUGSd, e
  (Installations on spaced/solid sheathing with battens or spaced sheathing)|INTERLOCKING CLAY OR CONCRETE ROOF TILE WITH PROJECTING ANCHOR LUGSd, e
  (Installations on spaced/solid sheathing with battens or spaced sheathing)|INTERLOCKING CLAY OR CONCRETE ROOF TILE WITH PROJECTING ANCHOR LUGSd, e
  (Installations on spaced/solid sheathing with battens or spaced sheathing)|INTERLOCKING CLAY OR CONCRETE ROOF TILE WITH PROJECTING ANCHOR LUGSd, e
  (Installations on spaced/solid sheathing with battens or spaced sheathing)| |Maximum Allow-
  able Stress Design
  Wind Speed,****Vasd
  f
  (mph)|Mean roof
  height (feet)|Roof slope < 5:12|Roof slope 5:12 < 12:12|Roof slope 12:12 and over| |85|0-60|Fasteners are not required.
  Tiles with installed weight less
  than 9 lbs./sq. ft. require not
  fewer than one fastener per tile.|One fastener per tile every other
  row. Perimeter tiles require one
  fastener. Tiles with installed weight
  less than 9 lbs./sq. ft. require not
  fewer than one fastener per tile.|One fastener required for
  every tile. Tiles with
  installed weight less than 9
  lbs./sq. ft. require not fewer
  than one fastener per tile.| |100|0-40|0-40|0-40|0-40| |100|> 40-60|The head of all tiles shall be nailed. The nose of all eave tiles shall be fastened with approved clips.
  Rake5 tiles shall be nailed with two nails. The nose of all ridge, hip and rake tiles shall be set in a bead
  of roofer’s mastic.|The head of all tiles shall be nailed. The nose of all eave tiles shall be fastened with approved clips.
  Rake5 tiles shall be nailed with two nails.

• California Residential Code Medium relevance — show source text

  ; 2′ C.R.S. with 1″ cover on
  both top and bottom flanges; 13′1″ span
  restrained.|60 psf|2 hrs|||7|1, 3|2| |F/C-6-RC-34|61/4″|61/4″ thick; 43/4″ (5120 psi) concrete core;
  1″ T&G board flooring;1/2″ plaster under-
  coat; 4″ × 3″ × 10 lbs R.S.J.; 3′ C.R.S. flush
  with top surface concrete; 12′ span simply
  supported; 2″ × 1′3″ clinker concrete
  insert.|100 psf|4 hrs|||7|1, 7|4| |F/C-6-RC-35|61/4″|43/4″ (3600 psi) concrete core; 1″ T&G
  board flooring;1/2″ plaster undercoat; 4″ ×
  3″ × 10 lbs R.S.J.; 3′ C.R.S. flush with top
  surface concrete; 12′ span simply
  supported; 2″ × 1′3″ clinker concrete
  insert.|100 psf|2 hrs
  30 min|||7|1, 5|21/2| |F/C-6-RC-36|61/4″|43/4″ (2800 psi) concrete core; 1″ T&G
  board flooring;1/2″ plaster undercoat; 4″ ×
  3″ × 10 lbs R.S.J.; 3′ C.R.S. flush with top
  surface concrete; 12″ span simply
  supported; 2″ × 1′3″ clinker concrete
  insert.|80 psf|4 hrs|||7|1, 7|4| |F/C-7-RC-37|7″|(3640 psi) concrete deck;1/4″ reinforce-
  ment bars at 6″ pitch with 11/2″ cover;1/4″
  reinforcement bars at 5″ pitch perpendic-
  ular with 11/2″ cover; 13′1″ span
  restrained.|169 psf|6 hrs|||7|1, 14|6| |F/C-7-RC-38|7″|(4060 psi) concrete deck; 4″ × 3″ × 10 lbs
  R.S.J.; 2′6″ C.R.S. with 11/2″ cover on both
  top and bottom flanges; 4″ × 6″ × 13 SWG
  mesh reinforcement 11/2″ from bottom of
  slab; 13′1″ span restrained.|175 psf|6 hrs|||7|1, 14|6| |F/C-7-RC-39|71/4″|53/4″ (4010 psi) concrete core; 1″ T&G
  board flooring;1/2″ plaster undercoat;
  4″ × 3″ × 10 lbs R.S.J.; 2′6″ C.R.S.

• California Residential Code Medium relevance — show source text

  
  2
  3|120
  123
  126|444
  498
  540|216
  247
  281|142
  145
  147|582
  652
  705|277
  321
  366|165
  168
  171|739
  825
  893|348
  407
  463| |15|1
  2
  3|125
  128
  131|511
  558
  597|229
  260
  292|153
  156
  159|658
  718
  760|297
  339
  382|184
  187
  190|824
  900
  960|375
  432
  486| |20|1
  2
  3|123
  126
  129|584
  625
  661|239
  270
  301|150
  153
  156|752
  805
  851|312
  354
  396|180
  184
  187|943
  1011
  1067|397
  452
  505| |30|1
  2
  3|119
  122
  125|680
  715
  746|255
  287
  317|145
  149
  152|883
  928
  968|337
  378
  418|175
  179
  182|1115
  1171
  1220|432
  484
  535| |50|1
  2
  3|115
  118
  121|798
  827
  854|294
  326
  357|140
  143
  147|1049
  1085
  1118|392
  433
  474|168
  172
  176|1334
  1379
  1421|506
  558
  611| |100|1
  2
  3|109
  113
  116|907
  933
  956|334
  368
  399|134
  138
  141|1222
  1253
  1282|454
  497
  540|161
  165
  169|1589
  1626
  1661|596
  651
  705|

  Col1	COMMON VENT CAPACITY	Col3	Col4	Col5	Col6	Col7	Col8	Col9	Col10
  	MINIMUM INTERNAL AREA OF MASONRY CHIMNEY FLUE (square inches)	MINIMUM INTERNAL AREA OF MASONRY CHIMNEY FLUE (square inches)	MINIMUM INTERNAL AREA OF MASONRY CHIMNEY FLUE (square inches)	MINIMUM INTERNAL AREA OF MASONRY CHIMNEY FLUE (square inches)	MINIMUM INTERNAL AREA OF MASONRY CHIMNEY FLUE (square inches)	MINIMUM INTERNAL AREA OF MASONRY CHIMNEY FLUE (square inches)	MINIMUM INTERNAL AREA OF MASONRY CHIMNEY FLUE (square inches)	MINIMUM INTERNAL AREA OF MASONRY CHIMNEY FLUE (square inches)	MINIMUM INTERNAL AREA OF MASONRY CHIMNEY FLUE (square inches)
  	63	63	63	78	78	78	113	113	113
  	**COMBINED APPLIANCE INPUT RATING

• CRC § 1.69 Medium relevance — show source text

  48| |1⁄2|1.69|1.55|1.45|1.23|1.89|1.22|1.22|1.44|1.18|1.18|1.35|1.64|NA|2.33| |3⁄4|3.43|3.22|2.90|2.52|3.38|3.28|3.28|2.72|2.35|2.35|2.14|2.54|NA|3.68| |1|5.81|5.49|5.17|4.24|5.53|5.37|5.37|4.58|3.88|3.88|3.46|4.22|NA|5.83| |11⁄4|8.70|8.36|8.09|6.38|9.66|8.65|8.65|8.23|5.80|5.80|5.47|6.59|NA|9.35| |11⁄2|12.18|11.83|11.45|8.95|13.20|13.91|13.91|11.38|8.08|8.08|8.64|10.27|NA|12.27| |2|21.50|20.58|20.04|15.38|21.88|23.16|23.16|19.11|13.86|13.86|13.64|16.42|NA|19.19|

  For SI units: 1 ounce = 29.573 mL, 1 inch = 25 mm, 1 foot = 304.8 mm

  • NA: Not Applicable

  2025 CALIFORNIA PLUMBING CODE 509

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

  APPENDIX L

  TABLE L 502.7.2(1) LENGTH (FT) PER VOLUME OF PIPING

• CRC § 9.1 Medium relevance — show source text

  Defined R202 Chimneys Caps R1003.9.1 Clearance R1003.18 Corbeling R1003.5 Crickets R1003.20 Design (masonry) R1003.1 Factory-built R1005 Fireblocking R1003.19 Fireplaces Chapter 10 Flue area R1003.14, R1003.15 Flue lining R1003.11 Load R1003.8 Multiple flue R1003.14 Rain caps R1003.9.3 Spark arrestors R1003.9.2 Termination R1003.9

  Wall thickness R1003.10

  Clay Tiles R905.3

  Cleanout Masonry chimney R1003.17 Climate Types R301.2 Climate Zones R202, R702.7.3, Table R702.7(5) Columns R407

  2025 CALIFORNIA RESIDENTIAL CODE INDEX-1

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

  INDEX

  Live load R301.5

  Nominal sizes R301.8

  Roof load R301.6

  Seismic R301.2.2

  Snow loads R301.2.3 Story height R301.3 Sunrooms R301.2.1.1.1

  Wind R301.2.1

  Doors

  Egress R318.2 Exterior R318.3, R609 Glazing R324 Draftstopping R302.12, R502.13 Drainage Foundation R405 Site drainage R300 Ducts

  Defined R202 Dwelling-garage wall and ceiling penetration R302.5.2 System, definition R202 Dwelling Unit Separation R302.2, R302.3 Sprinklers (see Automatic Sprinkler System)

  Electric Vehicle Charging Stations R317.6 Elevator R323.1, R323.3 Emergency Escape and Rescue Openings R319

  Additions R319.6

  Area wells R319.4 Bars, grilles, covers and screens R319.4.4

  Basements, existing R319.7 Dimensions R319.2

  Doors R319.3

  Replacement window R319.5 Under decks and porches R319.2.4 Where required R319.1 Window fall protection R321.2 Emergency Housing Appendix CJ Energy Storage Systems R328 ESS vehicle impact protection Figure R330.8.1 Maximum aggregate ratings of ESS Table R330.5 Protection from impact R330.8 Toxic and highly toxic gas R330.12 Entry 1.8.5, R104.4 Existing Buildings Appendix BO Administrative R101.2, R102.6, R105.1, R105.8, R106.2, R113.1, R113.2 Basements R313.1.2, R319.7 Carbon monoxide alarms R311.2.2, R311.5, R311.6 Flood R104.3.1

• CRC § 37-2020 Medium relevance — show source text

  37-2020|Pressurized Flushing Devices for Plumbing Fixtures|Backflow Protection|413.2| |ASSE 1070-2020/ASME
  A112.1070-2020/CSA
  B125.70-2020|Water Temperature Limiting Devices|Valves|407.3(1), 409.4(1),
  410.3(1), 417.7(1),
  417.8| |ASME B1.20.1-2013
  (R2018)|Pipe Threads, General Purpose (Inch)|Joints|605.1.5, 605.2.3,
  605.5.2, 605.12.3,
  705.1.3, 705.3.4,
  705.4.2, 705.6.3,
  1208.5.8, 1322.5(2)| |ASME B16.1-2020|Gray Iron Pipe Flanges and Flanged Fittings: Classes 25, 125,
  and 250|Fittings|1208.5.11.1|

  336 2025 CALIFORNIA PLUMBING CODE

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

  REFERENCED STANDARDS

  TABLE 1701.1 (continued) REFERENCED STANDARDS

  STANDARD NUMBER	STANDARD TITLE	APPLICATION	REFERENCED SECTION
  ASME B16.3-2021	Malleable Iron Threaded Fittings: Classes 150 and 300	Fittings	Table 604.1, Table 701.2
  ASME B16.4-2021	Gray Iron Threaded Fittings: Classes 125 and 250	Fittings	Table 604.1
  ASME B16.5-2020	Pipe Flanges and Flanged Fittings: NPS1⁄2 through NPS 24 Metric/Inch	Fittings	1208.5.11.2(1)
  ASME B16.12-2019	Cast Iron Threaded Drainage Fittings	Fittings	Table 701.2
  ASME B16.15-2018	Cast Copper Alloy Threaded Fittings: Classes 125 and 250	Fittings	Table 604.1
  ASME B16.18-2018	Cast Copper Alloy Solder Joint Pressure Fittings	Fittings	Table 604.1
  ASME B16.20-2017	Metallic Gaskets for Pipe Flanges	Joints	1208.5.12.2
  ASME B16.21-2021	Nonmetallic Flat Gaskets for Pipe Flanges	Joints	1208.5.12.3
  ASME B16.22-2018	Wrought Copper and Copper Alloy Solder-Joint Pressure Fit- tings	Fittings	Table 604.1, 1321.1
  ASME B16.23-2016	Cast Copper Alloy Solder Joint Drainage Fittings: DWV	Fittings	Table 701.2
  ASME B16.24-2016	Cast Copper Alloy Pipe Flanges, Flanged Fittings, and Valves: Classes 150, 300, 600, 900, 1500, and 2500	Fittings	1208.5.11.3
  ASME B16.

• CRC § 2.4 Medium relevance — show source text

  Court Emergency escape and rescue openings R319.1, R319.2.4 Means of egress R318.1 Natural light R325.1.1 Covering Exterior R703

  Interior R702 Roof Chapter 9 Wall Chapter 7 Crawl Space R408

  Access R408.4

  Damper Fireplace R1001.7.1 Dampproofing R406 Day Care Appendix BD Defined R202 Large family day-care homes R336 Dead Loads R301.4

  Decay Protection against R304 Deck

  Attachment R318.5 Supported by exterior wall R507 Wood/plastic composite boards R507.2.2

  Definitions Building R202 Mechanical system R202 Plumbing R202 Design Criteria R301 Alternative provisions R301.1.1 Application R301.1 Climatic and geographic R301.2 Dead load R301.4

  Deflection R301.6 Engineered design R301.1.3

  Accessibility R322 Accessory Dwelling Unit R202 Authority to Enforce Automatic Fire Sprinkler Systems 1.8.9.1, R313.2 Accessory Structure Elevations R306.3.2

  Energy R330.5 Exterior walls R302.1

  Scope R101.2 Addition (see also Existing Buildings) Carbon monoxide alarms R311.2.2 Change of occupancy R110.1 Construction R302.2.3

  Frost protection R403.1.4.1 Scope R101.2, R102.6.1 Smoke alarms R310.2.2 Address (Site) R308 Administration, California Chapter 1, Division 1

  General 1.1 Dept. of Housing and Community Development 1.8 Office of the State Fire Marshal 1.11 Administration, Division II Chapter 1 Applicability R102 Certificate of occupancy R110 Construction documents R106 Department of building safety R103 Duties and Powers R104

  Fees R106

  Inspections R109 Means of appeals R112 Permits R105, R105.5.1 Purpose R101.3 Service utilities R111 Stop work order R114 Temporary structures and uses R107 Violations R113 Aging-in-place Design and Fall Prevention R327

  Doorbell buttons R327.1.4 Electrical receptacle outlet, switch and control heights R327.1.2 Interior doors R327.1.3 Reinforcement for grab bars R327.1.1 Allowable Spans Of floor joists R502.3, R505.3.2 Of headers R602.7, R603.6 Of rafters and ceiling joists R802.4, R802.5, R804.3.1, R804.3.2 Alternate Materials (see Materials) R104.11 Alterations (see Existing Buildings) Anchor Bolts R403.1.6

  Appeal Board of 1.8.8, Appendix AA Means of 1.8.8, R112 Appliance Flue area R1003.14

• CRC § 2.3.1 Medium relevance — show source text

  2025 CALIFORNIA RESIDENTIAL CODE APPENDIX CK-7

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

  APPENDIX CK-8 2025 CALIFORNIA RESIDENTIAL CODE

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

  2025 CALIFORNIA RESIDENTIAL CODE APPENDIX NA-1

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

  APPENDIX NA-2 2025 CALIFORNIA RESIDENTIAL CODE

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

  Concrete Capillary break R506.2.3.1 Compressive strength R402.2 Floors (on ground) R506 Tile (roof) R905.3 Weathering Figure R301.2(1), R402.2 Construction

  3D-printed Appendix BM Cavity wall masonry R608 Cob Appendix BK Extended plate walls Appendix BN Flood-resistant R306

  Floors Chapter 5 Footings R403 Foundation material R402

  Foundation walls R404

  Foundations Chapter 4 Hemp-lime Appendix BL Masonry R606, R607, R608, R610 Pollutant control R340 Roofs Chapter 8 Steel framing R505, R603, R804 Strawbale Appendix BJ Straw-clay Appendix BI Walls Chapter 6 Waste R334.1 Wood framing R502, R602, R802 Construction Documents R106, R306.3.9

  Court Emergency escape and rescue openings R319.1, R319.2.4 Means of egress R318.1 Natural light R325.1.1 Covering Exterior R703

  Interior R702 Roof Chapter 9 Wall Chapter 7 Crawl Space R408

  Access R408.4

  Damper Fireplace R1001.7.1 Dampproofing R406 Day Care Appendix BD Defined R202 Large family day-care homes R336 Dead Loads R301.4

  Decay Protection against R304 Deck

  Attachment R318.5 Supported by exterior wall R507 Wood/plastic composite boards R507.2.2

  Definitions Building R202 Mechanical system R202 Plumbing R202 Design Criteria R301 Alternative provisions R301.1.1 Application R301.1 Climatic and geographic R301.2 Dead load R301.4

  Deflection R301.6 Engineered design R301.1.3

  Accessibility R322 Accessory Dwelling Unit R202 Authority to Enforce Automatic Fire Sprinkler Systems 1.8.9.1, R313.2 Accessory Structure Elevations R306.3.2

  Energy R330.5 Exterior walls R302.1

  Scope R101.2 Addition (see also Existing Buildings) Carbon monoxide alarms R311.2.2 Change of occupancy R110.1 Construction R302.2.3

• CRC § 1.1 Medium relevance — show source text

  CBC—25: California Building Code R101.2, R202, R301.1.1, R301.1.3, R301.2.1.1, R301.2.2.1.1, R301.2.2.1.2, R301.3, Table R302.1(1), Table R302.1(2), R302.2.1, R302.2.2, R302.3, R302.15.4, R322.1, R322.3, R324.5, R403.1.8, Table R602.10.3(3), Table R606.12.2.1, R609.2, R905.10.3

  CEBC—25: California Existing Building Code [®]

  R110.2, N1109.2

  CFC—25: California Fire Code [®]

  R102.6, R329.2, N1109.2, M2201.7, G2402.3, G2412.2

  CWUIC—25: California Wildland-Urban Interface Code

  R102.8, R337, R806.1.1, R907.1.1

  ICC 400—2022: Standard on the Design and Construction of Log Structures

  R301.1.1, R502.1.4, R602.1.4, R703.1, R802.1.3

  ICC 500—2020: ICC/NSSA Standard for the Design and Construction of Storm Shelters

  R307.1

  ICC 600—2020: 2020 Standard for Residential Construction in High-Wind Regions

  R301.2.1.1

  ICC 1100—2019: Standard for Spray-applied Polyurethane Foam Plastic Insulation

  R303.1.1

  IPMC—24: International Property Maintenance Code [®]

  R102.6

  ISO International Organization for Standardization Chemin de Blandonnet 8 Geneva, Switzerland CP 401 - 1214

  8336—2009: Fibre-cement Flat Sheets—Product Specification and Test Methods Table R503.2.1.1(1), Table R503.2.1.1(2), Table R602.3(2), Table R702.4.2, R703.10.1, R703.10.2

  44-16 2025 CALIFORNIA RESIDENTIAL CODE

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

  REFERENCED STANDARDS

  NFPA National Fire Protection Association 1 Batterymarch Park Quincy, MA 02169-7471

  13D— 25 : Standard for the Installation of Sprinkler Systems in One- and Two-Family Dwellings and Manufactured Homes as amended*

  R309.1.1, R309.2.1, R309.3.1, R309.3.1.1, R309.3.2.3, R309.3.6.1, R329.6.2.1

  *See California Fire Code for amendments

  *NFPA 13D, Amended Sections as follows:

• CRC § 8.4 Medium relevance — show source text

  Floor R503.3

  Walls R605 Patio Covers Appendix BF Penetrations R302.4, R302.5 Permits 1.8.4, R105, R105.5.1 Permit fees Appendix AB Photovoltaic Panel Systems R907 Ground-mounted definition R202

  Photovoltaic Support Structure, Elevated R202, R324.8, R324.8.1, R324.8.2 Piers R606.7

  Masonry R404.1.9 Planning Building Chapter 3 Plans R106

  Plaster

  Exterior R703.7

  Interior R702.2

  Platform Lifts R323.2, R323.3 Plumbing Fixture clearances R327

  Fixtures R326, R327 Inspection 109.1.2 Requirements and definitions R202 System, definition R202 Plywood Application R703.5 Materials, walls R604

  Precast Concrete

  Footings R403.4 Foundation material R402.3.1

  Foundation walls R404.5

  Protection Against decay and termites R304, R305 Against radon Appendix BE Public Way R318.1, R319.1 Purlins R802.4.5

  Hot Tubs (see Swimming Pools) R324.3.1, R328 Hurricane (see Storm Shelter)

  Impact Protective System Energy storage system R330.8 Flood R306.1.4.2, R306.3.3 Human impact R324.3 Storm shelter R307.2.1

  Windborne debris R301.2.1.2 Indirectly Conditioned Space (see Conditioned Space) Inflatable Amusement Device

  Defined R202

  Inlet To masonry chimneys R1003.16 Inspection On-site 1.8.4, R109.1 Insulation

  Above-deck R906 Flame spread R302.10 Foam plastic R303 Interior

  Lath R702.2.3

  Other finishes R702.5

  Plaster R702.2 Wall covering Chapter 7 Intermodal Shipping Container R301.1.4

  Joist

  Bearing R502.6, R606.6.3.1

  Kitchen Height and area R312, R313 Sinks R326

  Ventilation R325.1.2

  Labeling Garage doors R609.4.1 Ladders

  Ships ladders R318.7.13 Sleeping lofts R315.5.3 Landings (see also Stairways, Ramps and Doors) R318.3, R318.3.1, R318.3.2, R318.7.6, R318.8.2, R321, R324.4.7, R325.6, R325.7 Lateral Support R502.7, R606.6.4, R607.5.2 Lath

  Exterior R703.7.1

  Interior R702.2.3

  Lavatories R326.1

  Clearances R327 Liability R104.8 Light R325 Lighting Adjoining rooms R325.1.3 Bathrooms R325.2

• CRC § 2.3 Medium relevance — show source text

  SIP R610.8

  Steel R603.6

  Wood R602.7

  Hearth R1001.9

  Extension R1001.10, R1001.9

  Heaters

  Masonry R1002 Heating Required R325.8 Height Ceiling R313 Mezzanines R314.2 Sleeping lofts R315.3 Hollow-Unit Masonry (see Masonry)

  INDEX-2 2025 CALIFORNIA RESIDENTIAL CODE

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

  INDEX

  Roof shingles R905.4 Methods Water distribution pipe sizing Appendix CF Mezzanines (see also Sleeping Lofts) R314, R321 Modifications R104.2.3 Moisture Content, Building Materials R109.1.4.1

  Moisture Control R702.7

  Mortar

  Joints R606.3.1 Multiple Flues R1003.13

  Natural Light (see Light) Natural Ventilation (see Ventilation) Notching Steel joists R505.2.5, R505.3.5, R804.2.5, R804.3.3 Steel studs R603.2.6, R603.3.4 Wood joists R502.8, R802.7.1 Wood studs R602.6 Wood top plates R602.6.1

  Opening Protection R302.5

  Parapets R302.2.2, R606.4.4 Particleboard

  Floor R503.3

  Walls R605 Patio Covers Appendix BF Penetrations R302.4, R302.5 Permits 1.8.4, R105, R105.5.1 Permit fees Appendix AB Photovoltaic Panel Systems R907 Ground-mounted definition R202

  Photovoltaic Support Structure, Elevated R202, R324.8, R324.8.1, R324.8.2 Piers R606.7

  Masonry R404.1.9 Planning Building Chapter 3 Plans R106

  Plaster

  Exterior R703.7

  Interior R702.2

  Platform Lifts R323.2, R323.3 Plumbing Fixture clearances R327

  Fixtures R326, R327 Inspection 109.1.2 Requirements and definitions R202 System, definition R202 Plywood Application R703.5 Materials, walls R604

  Precast Concrete

  Footings R403.4 Foundation material R402.3.1

  Foundation walls R404.5

  Protection Against decay and termites R304, R305 Against radon Appendix BE Public Way R318.1, R319.1 Purlins R802.4.5

  Hot Tubs (see Swimming Pools) R324.3.1, R328 Hurricane (see Storm Shelter)

  Impact Protective System Energy storage system R330.8 Flood R306.1.4.2, R306.3.3 Human impact R324.3 Storm shelter R307.2.1

• CRC § 904.2 Medium relevance — show source text

  (c) The owner or occupant shall promptly correct or repair deficiencies, damaged parts or impairments found while performing the inspection, test and maintenance requirements of this standard. Recalled products shall be replaced or remedied. Such replacement or remedial product shall be installed in accordance with the listing requirements, the manufacturer’s instructions and the appropri- ate NFPA installation standards. A recalled product is a product subject to a statute or administrative regulation specifically requiring the manufacturer, importer, distributor, wholesaler or retailer of a product, or any combination of such entities, to recall the product, or a product voluntarily recalled by a combination of such entities.

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

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

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

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

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

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

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

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

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

  9-10 2025 CALIFORNIA FIRE CODE

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

  FIRE PROTECTION AND LIFE SAFETY SYSTEMS

• CRC § 104.1 Medium relevance — show source text

  402 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 D

  Col1	TABLE D 104.1 DISCHARGE FROM RECTANGULAR SCUPPERS (gallons per minute)1, 2, 3, 4	Col3	Col4	Col5	Col6	Col7
  WATER HEAD (inches)	WIDTH OF SCUPPER (inches)	WIDTH OF SCUPPER (inches)	WIDTH OF SCUPPER (inches)	WIDTH OF SCUPPER (inches)	WIDTH OF SCUPPER (inches)	WIDTH OF SCUPPER (inches)
  WATER HEAD (inches)	6	12	18	24	30	36
  1⁄2	6	13	19	25	32	38
  1	17	35	53	71	89	107
  11⁄2	31	64	97	130	163	196
  2	–	98	149	200	251	302
  21⁄2	–	136	207	278	349	420
  3	–	177	271	364	458	551
  31⁄2	–	–	339	457	575	693
  4	–	–	412	556	700	844

  For SI units: 1 inch = 25.4 mm, 1 gallon per minute = 0.06 L/s

  Notes: 1 Table D 104.1 is based on discharge over a rectangular weir with end contractions. 2 The head is the depth of water above the bottom of the scupper opening. 3 The height of the scupper opening shall be not less than two times the design head. 4 Coordinate the allowable head of water with the structural design of the roof.

  2025 CALIFORNIA PLUMBING CODE 403

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

  404 2025 CALIFORNIA PLUMBING CODE

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

  CALIFORNIA PLUMBING CODE – MATRIX ADOPTION TABLE

  APPENDIX E - MANUFACTURED/MOBILE HOME PARKS AND RECREATIONAL VEHICLE PARKS

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

• CRC § 2.5 Medium relevance — show source text

  Parapet construction R302.2.5 Scope R101.2 Separation R302.2 Structural independence R302.2.6 Trusses

  Steel R505.1.3, R804.3.6 Wood R502.12, R802.10 Tubular Daylighting Device (TDD) (see Skylights) Two-Family Dwellings R302.3

  Under Floor

  Space R408

  Vapor Retarders R702.7 Capillary break R506.2.3.1 Under floor R408.8 Vehicular Gates Appendix BH Veneer

  Masonry R703.7 Ventilation Adjoining rooms R325.1.3 Bathroom and kitchen R325.2

  Habitable rooms R325.1

  Roof R806

  Under floor R408.1 Venting (Mechanical) Chimney and vent connectors R1006 Fireplace R1006 General R325.3

  Violations R113 Visible Transmittance (VT)

  Wall Furnace (see Appliance) Wallboard (see Gypsum) Walls

  Bathtub compartments R327.2 Bracing, steel R603.9 Bracing, wood R602.10 Construction Chapter 6 Covering Chapter 7 Crawl space R202 Cripple R602.9

  INDEX-4 2025 CALIFORNIA RESIDENTIAL CODE

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

  INDEX

  Deflection R301.7

  Exterior, defined R202 Exterior covering R703 Finishes R327.2, R702 Fireplace R1001.5 Foundation R404 Insulating concrete form R608.3, R608.4, R608.5.3 Steel framing R603 Structural insulated panels (SIP) R610 Thickness, masonry chimneys R1003.10 Wood framing R602 Waste

  Construction waste R334

  Water Closet R326.1, R327 Clearances for R327.1 Waterproofing And dampproofing R406 Wells (see Individual Water Supply) Whirlpool Bathtubs R324.3.1, P2720 Wind

  Design criteria R301.2, R301.2.1 Speed maps Figure R301.2(2) Window R609 Emergency Escape and Rescue Openings R319, R321.2.2 Fall protection R321.2 Glazing R324 Light and ventilation R325 Opening limiting devices R321.2.2 Wood

  Floor construction R502

  Foundation walls R404.2 Protection against decay R304 Roof-ceiling construction R802 Shakes R905.8 Shingles R905.7 Trusses R502.12, R802.10 Walls R602

  Yard R318.1, R319.1, R319.2.4, R325.1.1

  2025 CALIFORNIA RESIDENTIAL CODE INDEX-5

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  INDEX-6 2025 CALIFORNIA RESIDENTIAL CODE

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  HISTORY NOTE APPENDIX

• CRC § 2.2 Medium relevance — show source text

  R606.2.2

  44-6 2025 CALIFORNIA RESIDENTIAL CODE

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

  REFERENCED STANDARDS

  C216—21: Specification for Facing Brick (Solid Masonry Units Made from Clay or Shale) R202, Table R301.2(1), R606.2.2

  C270—19ae1: Specification for Mortar for Unit Masonry R606.2.8, Table R606.2.8, R606.2.11

  C315—2007(2021): Specification for Clay Flue Liners and Chimney Pots R1001.8, R1003.11.1, Table R1003.14(1)

  C406/C406M—2015: Specification for Roofing Slate

  R905.6.4

  C475/C475M—2017: Specification for Joint Compound and Joint Tape for Finishing Gypsum Board

  R702.3.1

  C476—20: Specification for Grout for Masonry

  R606.2.12

  C503/C503M—2015: Standard Specification for Marble Dimension Stone

  R606.2.4

  C514—04(2020): Standard Specification for Nails for the Application of Gypsum Board

  R702.3.1

  C552—22: Standard Specification for Cellular Glass Thermal Insulation

  Table R906.2

  C557—2003(2017): Specification for Adhesives for Fastening Gypsum Wallboard to Wood Framing

  R702.3.1.1

  C568M—2015: Standard Specification for Limestone Dimension Stone

  R606.2.4

  C578—19: Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation R403.3, Table R703.8.4(2), Table R703.15.1, Table R703.15.2, Table R703.16.1, Table R703.16.2, Table R906.2

  C587—2004(2018): Specification for Gypsum Veneer Plaster

  R702.2.1

  C595/C595M—21: Specification for Blended Hydraulic Cements

  R608.5.1.1, R702.2.2, R703.7.2

  C615/C615M—2018E1: Standard Specification for Granite Dimension Stone

  R606.2.4

  C616/C616M—2015: Standard Specification for Quartz-Based Dimension Stone

  R606.2.4

  C629/C629M—2015: Standard Specification for Slate Dimension Stone

  R606.2.4

  C631—09(2020): Standard Specification for Bonding Compounds for Interior Gypsum Plastering

  R702.2.1

  C645—2018: Specification for Nonstructural Steel Framing Members

  R702.3.3

  C652—21: Specification for Hollow Brick (Hollow Masonry Units Made from Clay or Shale) R202, Table R301.2(1), R606.2.2

  C685/C685M—2017: Specification for Concrete Made by Volumetric Batching and Continuous Mixing

  R404.1.3.3.2, R608.5.1.2

  C726—2017: Standard Specification for Mineral Wool Roof Insulation Board

  Table R906.2

• CRC § 0-60 Medium relevance — show source text

  The nose of all ridge, hip and rake tiles shall be set in a bead
  of roofer’s mastic.|The head of all tiles shall be nailed. The nose of all eave tiles shall be fastened with approved clips.
  Rake5 tiles shall be nailed with two nails. The nose of all ridge, hip and rake tiles shall be set in a bead
  of roofer’s mastic.| |110|0-60|The fastening system shall resist the wind forces in Section 1609.6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.| |120|0-60|The fastening system shall resist the wind forces in Section 1609.6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.| |130|0-60|The fastening system shall resist the wind forces in Section 1609.6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.| |All|> 60|The fastening system shall resist the wind forces in Section 1609.6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.|The fastening system shall resist the wind forces in Section 1609.6.3.1.| |INTERLOCKING CLAY OR CONCRETE ROOF TILE WITH PROJECTING ANCHOR LUGS
  (Installations on solid sheathing without battens)|INTERLOCKING CLAY OR CONCRETE ROOF TILE WITH PROJECTING ANCHOR LUGS
  (Installations on solid sheathing without battens)|INTERLOCKING CLAY OR CONCRETE ROOF TILE WITH PROJECTING ANCHOR LUGS
  (Installations on solid sheathing without battens)|INTERLOCKING CLAY OR CONCRETE ROOF TILE WITH PROJECTING ANCHOR LUGS
  (Installations on solid sheathing without battens)|INTERLOCKING CLAY OR CONCRETE ROOF TILE WITH PROJECTING ANCHOR LUGS
  (Installations on solid sheathing without battens)| |Maximum Allow-
  able Stress Wind
  Speed,****Vasd
  f (mph)|Mean roof
  height (feet)|All roof slopes|All roof slopes|All roof slopes| |85|0-60|One fastener per tile.|One fastener per tile.|One fastener per tile.| |100|0-40|One fastener per tile.|One fastener per tile.|One fastener per tile.| |100|> 40-60|The head of all tiles shall be nailed. The nose of all eave tiles shall be fastened with approved clips. Rake tiles
  shall be nailed with two nails. The nose of all ridge, hip and rake tiles shall be set in a bead of roofer’s mastic.|The head of all tiles shall be nailed. The nose of all eave tiles shall be fastened with approved clips.

• CRC § 916-574 Medium relevance — show source text

  Note: Contact information for the California Department of Water Resources and the Department’s Directory of Flood Officials, which includes levee and reclamation district boundary maps, is available on-line at the following website: www.water.ca.gov/ BuildingCodes. The Department of Water Resources Building Code Project Engineer can be contacted at 916-574-1451. The Central Valley Flood Control Board Chief Engineer can be contacted at 916-574-0609. The California Emergency Management Agency Inland Region Program Manager can be contacted at 916-845-8488.

  CK109.2 Appeals. When a request for an alternate means of protection has been denied by the building official, the applicant may file a written appeal with the board of appeals. In considering such appeal, the board of appeals may provide additional information to, and request additional written statements from the Central Valley Flood Protection Board, the California Department of Water Resources and the California Emergency Management Agency. If such additional written statements are provided, the board of appeals shall consider those statements.

  2025 CALIFORNIA RESIDENTIAL CODE APPENDIX CK-5

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  APPENDIX CK — AREAS PROTECTED BY THE FACILITIES OF THE CENTRAL VALLEY FLOOD PROTECTION PLAN

  APPENDIX CK-6 2025 CALIFORNIA RESIDENTIAL CODE

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  APPENDIX CK — AREAS PROTECTED BY THE FACILITIES OF THE CENTRAL VALLEY FLOOD PROTECTION PLAN

  2025 CALIFORNIA RESIDENTIAL CODE APPENDIX CK-7

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  APPENDIX CK-8 2025 CALIFORNIA RESIDENTIAL CODE

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  2025 CALIFORNIA RESIDENTIAL CODE APPENDIX NA-1

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  APPENDIX NA-2 2025 CALIFORNIA RESIDENTIAL CODE

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  Concrete Capillary break R506.2.3.1 Compressive strength R402.2 Floors (on ground) R506 Tile (roof) R905.3 Weathering Figure R301.2(1), R402.2 Construction

  3D-printed Appendix BM Cavity wall masonry R608 Cob Appendix BK Extended plate walls Appendix BN Flood-resistant R306

  Floors Chapter 5 Footings R403 Foundation material R402

  Foundation walls R404

  Foundations Chapter 4 Hemp-lime Appendix BL Masonry R606, R607, R608, R610 Pollutant control R340 Roofs Chapter 8 Steel framing R505, R603, R804 Strawbale Appendix BJ Straw-clay Appendix BI Walls Chapter 6 Waste R334.1 Wood framing R502, R602, R802 Construction Documents R106, R306.3.9

• CRC § 1.811 Medium relevance — show source text

  36|1.811|0.346|0.087| |14.12|2.298|0.438|0.110| |15.89|2.837|0.539|0.135| |17.66|3.456|0.650|0.163| |19.42|–|0.771|0.193| |21.19|–|0.900|0.225| |22.95|–|1.038|0.260| |24.72|–|1.185|0.295| |28.25|–|1.505|0.375| |31.78|–|1.859|0.463| |35.31|–|2.247|0.559| |38.84|–|2.667|0.663| |42.37|–|3.121|0.775| |45.90|–|3.607|0.895| |49.43|–|4.125|1.022| |52.97|–|–|1.157| |56.50|–|–|1.299| |60.03|–|–|1.449| |63.56|–|–|1.607| |67.09|–|–|1.772| |70.62|–|–|1.944| |81.21|–|–|2.503| |91.81|–|–|3.127| |102.40|–|–|3.813|

  For SI units: 1 standard cubic foot per minute = 28.32 SLPM, 1 inch = 25 mm, 1 foot = 304.8 mm, 1 pound-force per square inch = 6.8947 kPa

  Notes: 1 Based on pressure of 14.7 psig (101 kPa) at 68°F (20°C). 2 Based on pressure of 55 psig (379 kPa) at 68°F (20 °C).

  2025 CALIFORNIA PLUMBING CODE 291

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

  HEALTH CARE FACILITIES AND MEDICAL GAS AND MEDICAL VACUUM SYSTEMS

  TABLE 1323.1.4(5) PRESSURE LOSS FOR VACUUM (continued)

• CRC § 10-13 Medium relevance — show source text

  R1006.5 Outlet. The exterior air outlet shall be located in the back or side of the firebox chamber or shall be located outside of the firebox, at the level of the hearth and not greater than 24 inches (610 mm) from the firebox opening. The outlet shall be closable and designed to prevent burning material from dropping into concealed combustible spaces.

  2025 CALIFORNIA RESIDENTIAL CODE 10-13

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  10-14 2025 CALIFORNIA RESIDENTIAL CODE

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  Part IV—Energy Conservation

  (Note: Part IV is not adopted. See California Energy Code, Title 24, Part 6.)

  2025 CALIFORNIA RESIDENTIAL CODE 11-1

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  11-2 2025 CALIFORNIA RESIDENTIAL CODE

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  Part V—Mechanical

  (Note: Part V is not adopted. See California Mechanical Code, Title 24, Part 4.)

  2025 CALIFORNIA RESIDENTIAL CODE 12-1

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  12-2 2025 CALIFORNIA RESIDENTIAL CODE

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  Part VI—Fuel Gas

  (Note: Part VI is not adopted. See California Mechanical Code and California Plumbing Code, Title 24, Parts 4 and 5.)

  2025 CALIFORNIA RESIDENTIAL CODE 24-1

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  24-2 2025 CALIFORNIA RESIDENTIAL CODE

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  Part VII—Plumbing

  (Note: Part VII is not adopted. See California Plumbing Code, Title 24, Part 5.)

  2025 CALIFORNIA RESIDENTIAL CODE 25-1

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  25-2 2025 CALIFORNIA RESIDENTIAL CODE

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  Part VIII—Electrical

  (Note: Part VIII is not adopted. See California Electrical Code, Title 24, Part 3.)

  2025 CALIFORNIA RESIDENTIAL CODE 34-1

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  34-2 2025 CALIFORNIA RESIDENTIAL CODE

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  CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE

  CHAPTER 44 – REFERENCED STANDARDS

  (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

• CRC § 6.6.1.4 Medium relevance — show source text

  6.6.1.4 The number of fire appurtenances between sectional control valves is allowed to be modified by the authority having jurisdiction.

  Revise Section 10.4.3.1.1 as follows:

  10.4.3.1.1 Pipe joints shall not be located under foundation footings. The pipe under the building or building foundation shall not contain mechanical joints.

  Exceptions:

  1. Where allowed in accordance with 10.4.3.2.

  2. Alternate designs may be utilized where designed by a registered professional engineer and approved by the enforcing agency.

  Revise Section 10.9.1 as follows:

  10.9.1 Backfill shall be well tamped in layers or puddle under and around pipes to prevent settlement or lateral movement. Backfill shall consist of clean fill sand or pea gravel to a minimum 6″ below and to a minimum of 12″ above the pipe and shall contain no ashes, cinders, refuse, organic matter or other corrosive materials. Other backfill materials and methods are permitted where designed by a registered professional engineer and approved by the enforcing agency.

  25—13CA: California NFPA 25 Edition (Based on the 2011 Edition) Inspection, Testing and Maintenance of Water-based Fire Protection Systems Chapter 31F, 3108F

  30—24: Flammable and Combustible Liquids Code

  607.1, 5001.1, 5701.2, 5703.6.2, 5703.6.2.1, 5704.2.7, 5704.2.7.1, 5704.2.7.2, 5704.2.7.3.2, 5704.2.7.4, 5704.2.7.6, 5704.2.7.7, 5704.2.7.8, 5704.2.7.9, 5704.2.9.3, 5704.2.9.4, 5704.2.9.6.1.1, 5704.2.9.6.1.2, 5704.2.9.6.1.3, 5704.2.9.6.1.4, 5704.2.9.6.1.5, 5704.2.9.6.2, 5704.2.9.7.3, 5704.2.10.2, 5704.2.11.3, 5704.2.11.4.2, 5704.2.12.1, 5704.3.1, 5704.3.6, Table 5704.3.6.3(1), Table 5704.3.6.3(2), Table 5704.3.6.3(3), 5704.3.7.2.3, 5704.3.8.4, 5706.8.3

  30A—24: Code for Motor Fuel Dispensing Facilities and Repair Garages

  2301.4, 2301.5, 2301.6, 2306.6.3, 2310.1

• CRC § 17.4 Medium relevance — show source text

  8|17.4|1.5|2.5|3.4|5.1|0.6|1.0|1.3|1.9| |10|7.7|13.1|17.8|26.3|2.3|3.8|5.2|7.7|0.8|1.4|2.0|2.9| |12|10.8|18.4|24.9|NP|3.2|5.4|7.3|10.7|1.2|2.0|2.7|4.0| |14|14.4|24.5|NP|NP|4.2|7.1|9.6|14.3|1.6|2.7|3.6|5.4| |16|18.4|NP|NP|NP|5.4|9.1|12.4|18.3|2.0|3.4|4.7|6.9| |18|22.9|NP|NP|NP|6.7|11.4|15.4|22.7|2.5|4.3|5.8|8.6| |20|27.8|NP|NP|NP|8.1|13.8|18.7|27.6|3.1|5.2|7.0|10.4| |22|NP|NP|NP|NP|9.7|16.5|22.3|NP|3.7|6.2|8.4|12.4| |24|NP|NP|NP|NP|11.4|19.3|26.2|NP|4.3|7.3|9.9|14.6| |26|NP|NP|NP|NP|13.2|22.4|NP|NP|5.0|8.5|11.4|16.9| |28|NP|NP|NP|NP|15.1|25.7|NP|NP|5.7|9.7|13.1|19.4| |30|NP|NP|NP|NP|17.2|NP|NP|NP|6.5|11.0|14.9|22.0| |32|NP|NP|NP|NP|19.4|NP|NP|NP|7.3|12.4|16.8|24.8| |34|NP|NP|NP|NP|21.7|NP|NP|NP|8.2|13.9|18.8|NP| |36|NP|NP|NP|NP|24.1|NP|NP|NP|9.1|15.4|20.9|NP| |For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 gallon per minute = 0.063 L/s, 1 pound per square inch = 6.895 kPa.
  NP = Not Permitted. Pressure loss exceeds reasonable limits.
  a. Values are applicable for underground piping materials listed in_ the California Plumbing Code_ and are based on an SDR of 11 and a Hazen Williams C Factor of 150.
  b. Values include the following length allowances for fittings: 25-percent length increase for actual lengths up to 100 feet and 15-percent length increase for actual lengths over
  100 feet.
  c. Flow rate from Section P2904.4.2.

• CRC § 1701.2 Medium relevance — show source text

  Plastic| |ASTM D2657-2007 (R2015)|Standard Practice for Heat Fusion Joining of Polyolefin Pipe and Fittings|Joints| |ASTM D2774-2021a|Standard Practice for Underground Installation of Thermoplastic Pressure Piping|Piping, Plastic| |ASTM D2855-2020|Standard Practice for the Two-Step (Primer and Solvent Cement) Method of Joining
  Poly (Vinyl Chloride) (PVC) or Chlorinated Poly (Vinyl Chloride) (CPVC) Pipe and
  Piping Components with Tapered Sockets|Joints| |ASTM D3122-2015|Standard Specification for Solvent Cement for Styrene-Rubber (SR) Plastic Pipe and
  Fittings|Joints| |ASTM D3311-2017 (R2021)|Standard Specification for Drain, Waste, and Vent (DWV) Plastic Fittings Patterns|Fittings| |ASTM F402-2018|Standard Practice for Safe Handling of Solvent Cements, Primers, and Cleaners Used
  for Joining Thermoplastic Pipe and Fittings|Joints| |ASTM F480-2014|Standard Specification for Thermoplastic Well Casing Pipe and Couplings Made in
  Standard Dimension Ratios (SDR), SCH 40 and SCH 80|Piping, Plastic| |ASTM F810-2012 (R2018)|Standard Specification for Smoothwall Polyethylene (PE) Pipe for Use in Drainage
  and Waste Disposal Absorption Fields|Piping, Plastic| |ASTM F949-2020|Standard Specification for Poly (Vinyl Chloride) (PVC) Corrugated Sewer Pipe with a
  Smooth Interior and Fittings|Piping, Plastic| |ASTM F1476-2007 (R2019)|Standard Specification for Performance of Gasketed Mechanical Couplings for Use in
  Piping Applications|Joints| |ASTM F1499-2017|Standard Specification for Coextruded Composite Drain, Waste, and Vent Pipe
  (DWV)|Piping, Plastic|

  354 2025 CALIFORNIA PLUMBING CODE

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

  REFERENCED STANDARDS

  TABLE 1701.2 (continued) STANDARDS, PUBLICATIONS, PRACTICES, AND GUIDES

  DOCUMENT NUMBER	DOCUMENT TITLE	APPLICATION
  ASTM F1743-2017	Standard Practice for Rehabilitation of Existing Pipelines and Conduits by Pulled-in- Place Installation of Cured-in-Place Thermosetting Resin Pipe (CIPP)	Piping, Plastic
  ASTM F1924-2019	Standard Specification for Plastic Mechanical Fittings for Use on Outside Diameter Controlled Polyethylene Gas Distribution Pipe and Tubing	Fittings
  ASTM F1948-2020	Standard Specification for Metallic Mechanical Fittings for Use on Outside Diameter Controlled Thermoplastic Gas Distribution Pipe and Tubing	Fittings
  ASTM F2165-2019	Standard Specification for Flexible Pre-Insulated Piping	Piping, Plastic
  ASTM F2206-2019	Standard Specification for Fabricated Fittings of Butt-Fused Polyethylene (PE)	DWV Components
  ASTM F2306/F2306M- 2021	Standard Specification for 12 to 60 in.

• CRC § 1.00 Medium relevance — show source text

  California Matrix Adoption Tables with California Code of Regulations, Title 19, Division 1

  State Fire Marshal T-24 Column: If there is an “X” in the T-24 column under SFM, refer to the California Matrix Adoption Tables explaining how to use the matrix adoption tables.

  State Fire Marshal T-19 Column: If there is an “X” in the T-19 column under SFM, this means that the corresponding section was reprinted from the California Code of Regulations (CCR), Title 19, Division 1 into the California Fire Code for the code user’s convenience. The corresponding Title-19 sections were listed in the matrix adoption tables in the order that they appear in the California Fire Code . The scope, applicability and appeals procedures of CCR, Title 19, Division 1 has not changed. For information regarding the specific purpose and scope of CCR, Title 19, unless otherwise specified, refer to CCR, Title 19, Division 1, Chapter 1, Subchapter 1, Article 1, Sections 1.00 through 1.14.

  Example:

  CHAPTER 3 – GENERAL PRECAUTIONS AGAINST FIRE

  Adopting agency	BSC	BSC- CG	SFM	Col5	HCD	Col7	Col8	DSA	Col10	OSHPD	Col12	Col13	Col14	Col15	Col16	Col17	BSCC	DPH	AGR	DWR	CEC	CA	SL	SLC
  Adopting agency	BSC	BSC- CG	T-24	T-19*	1	2	1-AC	AC	SS	1	1R	2	3	4	5	6	6	6	6	6	6	6	6	6
  Adopt entire chapter
  Adopt entire chapter as amended (amended sections listed below)
  Adopt only those sections that are listed below			X
  [California Code of Regulations, Title 19, Division 1]				X
  Chapter/Section							S	A	M	P	L	E
  301
  [T-19 §3.14]		X
  [T-19 §3.19 (a-g)]				X
  304				X
  [T-19 §3.07(a)]		X
  [T-19 §3.07(b)]				X

  *The California Code of Regulations (CCR), Title 19, Division 1 provisions that are found in the California Fire Code are a reprint from the current CCR, Title 19, Division 1 text for the code user’s convenience only. The scope, applicability and appeals procedures of CCR, Title 19, Division 1 remains the same.