Article II — CALIFORNIA PLUMBING CODE, AMENDED SECTIONS TO 2025 CALIFORNIA PLUMBING…

The County has exercised its authority to establish more restrictive and reasonably necessary differences to the provisions contained in this code pursuant to complying with Section 1.1.8.1. {Delete remaining sentences in this paragraph.}

The modifications comply with Health and Safety Code Section 18941.5 for Building Standards Law and Health and Safety Code Section 17958 for State Housing Law {Delete remainder of this sentence.}

(Ord. No. 2025-72, Exh. B, 12-16-25)

101.1 through 102.7 {See CPC and AC Sections 15.08.020 through 15.08.150 for administrative provisions when applicable.}

102.8 Appendices [BID]. Provisions in the appendices shall not apply unless specifically adopted. The following CPC appendices are adopted, without amendment, by the County:

1. Appendix A, Recommended Rules for Sizing the Water Supply System.

2. Appendix B, Explanatory Notes on Combination Waste and Vent Systems.

3. Appendix D, Sizing Storm Water Drainage Systems.

4. Appendix H, Private Sewage Disposal Systems.

5. Appendix I, Installation Standard.

6. Appendix K, Potable Rainwater Catchment Systems.

103.0 through 107.2 {See CPC and AC Sections 15.08.020 through 15 08.150 for administrative provisions when applicable.}

(Ord. No. 2025-72, Exh. B, 12-16-25)

{See CPC, and the following definitions are modified.}

Flood Hazard Area [FLOOD]. {See CPC and AC Chapter 15.40 of this title.}

Private Sewage Disposal System [HLTH]. A septic tank with the effluent discharging into a subsurface disposal field, into one or more seepage pits, or into a combination of subsurface disposal field and seepage pit or of such other facilities as may be permitted under the procedures set forth elsewhere in this code and in AC Chapter 15.18 of this title.

(Ord. No. 2025-72, Exh. B, 12-16-25)

3, General Regulations, Section 304.0, Connections to Plumbing System Required.

304.1 General [CLN WATER]. Plumbing fixtures, drains, appurtenances, and appliances, used to receive or discharge liquid wastes or sewage, shall be connected properly to the drainage system of the building or premises, in accordance with the requirements of this code and AC Section 15.08.180.

304.2 Private Sewage Disposal System [HLTH] {Added}. When a public sewer is not available for use, drainage piping from buildings and premises shall be connected to an approved private sewage disposal system in accordance with AC Chapter 15.18 of this title.

(Ord. No. 2025-72, Exh. B, 12-16-25)

4, Plumbing Fixtures and Fixture Fittings, Section 418.3, Location of Floor Drains.

418.3 Location of Floor Drains [CLN WATER]. Floor drains shall be installed in the following areas:

(1) Toilet rooms containing two or more water closets or a combination of one water closet and one urinal, except in a dwelling unit.

(2) Commercial kitchens in accordance with Section 704.3.

(3) Laundry rooms in commercial buildings and common laundry facilities in multi-family dwelling buildings.

(4) Boiler rooms.

(5) Locations described in AC Section 15.08.180.

(6) Covered areas in vehicular parking structures, as determined on a case-by-case basis by the building official.

(Ord. No. 2025-72, Exh. B, 12-16-25)

713.2 Private Sewage Disposal System [HLTH]. Where no public sewer intended to serve a lot or premises is available in a thoroughfare or right-of-way abutting such lot or premises, drainage piping from a building or works shall be connected to an approved private sewage disposal system in accordance with AC Chapter 15.18.

713.3 Public Sewer [HLTH]. {See CPC, and add the following.} The determination of whether an existing public sewer is deemed to be available shall be in accordance with AC Chapter 15.18.

713.4 Public Sewer Availability [HLTH]. {See CPC, and add the following.} In the event that a public sewer previously determined to be unavailable in accordance with the provisions of CPC Section 713.2 is later extended so as to become available to the said lot or premises, the on-site wastewater treatment system shall be abandoned as directed by the director of environmental health, and all plumbing and drainage systems or parts thereof on such lot or premises shall be connected to the said public sewer.

(Ord. No. 2025-72, Exh. B, 12-16-25)

{See CPC, and delete the footnotes from Table 717.1.}

• (Ord. No. 2025-72, Exh. B, 12-16-25)

7, Sanitary Drainage, Section 718.0, Grade, Support, and Protection of Building Sewers.

718.1 Slope [BID]. Building sewers shall be run in practical alignment and at a uniform slope of not less than 1/4 inch per foot (20.8 mm/m) toward the point of disposal. The building sewer shall be brought to the building at an elevation below the lowest floor being drained by the building drain to which it will be connected. The invert elevation of the building sewer at the point of disposal shall be at least 3 feet (914 mm) below the top of curb of the adjacent roadway.

Exceptions:

1. When approved by the Building Official where it is impractical, due to the depth of the street sewer or to the structural features or to the arrangement of any building or structure, to obtain a slope of 1/4 inch per foot (20.8 mm/m), such pipe or piping 4 inches (100 mm) through 6 inches (150 mm) shall be permitted to have a slope of not less than 1/8 inch per foot (10.4 mm/m) and any such piping 8 inches (200 mm) and larger shall be permitted to have a slope of not less than 1/16 inch per foot (5.2 mm/m).

2. Slopes in excess of 20 % (2.4 inches per foot) shall be allowed only with the approval of the building official. Where such slopes are necessitated by the topography of the building site, such approval requests shall require the submittal of a soil and/or geologic investigation report.

3. Where straight alignment of the building sewer is not practical, one change in alignment not to exceed 22-1/2 degrees may be made within the premises. The said alignment change may be made with curved pipe sections and/or pipe joint deflections, as approved by the building official.

4. The building official shall have the authority to require that the design of building sewers that are part of a pumped system be subject to the approval of the sanitary district serving the property in question.

5. Where it is impractical to install the building sewer so that the invert at the property line is at least 3 feet (914 mm) below the top of curb, the cover over the building sewer at the property line may be reduced provided that a reinforced concrete cap, or equivalent, is installed over the pipe and under the adjacent roadway sidewalk, curb, and gutter in accordance with the requirements of the sanitary district serving the property in question, but in no case shall the said cover be less than 18 inches (457 mm).

718.3 Protection from Damage [BID]. No building sewer or other sanitary drainage piping or part thereof, which is constructed of materials other than those approved for use under or within a building, shall be installed under or within 2 feet (610 mm) of a building or structure, or part thereof, nor less than 1 foot (305 mm) below the surface of the ground. The provisions of this subsection include structures such as porches and steps, whether covered or uncovered; breezeways; roofed porte-cochere; roofed patios; carports; covered walks; covered driveways; and similar structures or appurtenances.

No building sewer shall be located within 50 feet (15.2 m) of the flow line of waterways or in areas of known or projected seismic landslide hazard without the submittal, to the building official, of a soil and/or geological investigation report. The said report shall include recommendations for material, relocation, redesign, or other means of protection for the building sewer as necessary. The building official shall have the authority to require that any such recommendations and/or other means of reasonable protection be provided as a condition of authorizing the construction of the building sewer.

The building official shall have the authority to require that any building sewer be protected through the installation of interceptors in accordance with the provisions of CPC Section 1014.

Exception: The building official shall have the authority to require that any report required by this section be submitted for review and concurrence by the sanitary district serving the property in question, and to include any or all recommendations of the said district as part of the conditions of approval of the building sewer.

(Ord. No. 2025-72, Exh. B, 12-16-25)

Earthquake-actuated gas shutoff valves designed to automatically shut off the gas at the location of the valve in the event of a seismic disturbance and certified by the State Architect as conforming to California Code of Regulations, Title 24, Part 12, Chapter 12-16-1, shall be provided for buildings as required by this section. Earthquake-actuated gas shutoff valves which have not been certified by the State Architect shall be prohibited.

1211.8.1 Definitions [BID]. {Added} For the purposes of this section, the following terms, phrases, and words shall be interpreted as set forth in this subsection:

Downstream of the Gas Utility. Piping and appurtenances downstream of the service piping; i.e. piping and appurtenances under the control of and maintained by the building owner. See CPC Section 209 Gas Piping System.

Earthquake-actuated Gas Shutoff Valve (Device), or Seismic-actuated Gas Shutoff Valve (Device). See Section 1211.8.

Excess Flow Gas Shutoff Valve (device). See CPC Section 207.

Existing Building. Any building for which the initial construction permit was issued prior to July 5, 2001.

Gas Shutoff Valve (Device). See Earthquake-actuated gas shutoff valve.

Major Remodeling. The alteration of an existing building, when that alteration includes work involving the existing gas piping system and the valuation of the alteration exceeds $5,000.00, or when that alteration does not include work involving the existing gas piping system but the valuation of the alteration exceeds $50,000.00. The installation of a new gas piping system in an existing building that does not include an existing gas piping system shall be considered major remodeling, regardless of valuation.

Multi-functional Gas Shutoff Valve (Device). A seismic-actuated gas shutoff valve combined with additional safety components intended to be actuated in the event of gas leakage, carbon monoxide buildup, or other events.

New Building. Any building for which the initial construction permit was issued on or after July 5, 2001.

Residential Building. Any building with an R-2 or R-3 occupancy classification per the California Building Code.

Service Piping. See CPC 221.0.

1211.8.2 Where Required [BID]{Added}. Gas shutoff devices, designed and certified in accordance with this section, shall be installed in the gas piping systems of all new residential, commercial, and industrial buildings and the gas piping systems of existing residential, commercial, and industrial buildings undergoing major remodeling.

Exceptions:

1. Gas shutoff devices are not required to be installed in a fuel gas line downstream of the gas utility meter when such a device, conforming to the requirements of this section, is installed in the same line upstream of the meter and downstream of the meter service regulator, provided that the installation of the device was completed by employees or agents of the gas utility in accordance with the requirements of the device manufacturer.

2. Gas shutoff devices are not required to be installed in a fuel gas line downstream of the gas utility meter when a functional but non-conforming shutoff device was installed downstream of the gas utility meter in

the same line prior to July 5, 2001, provided that the installation was completed in accordance with the requirements of the device manufacturer and that the device is maintained for the life of the building.

3. Gas shutoff devices installed by a gas utility in a gas distribution system owned and maintained by that utility are not subject to the requirements of this section.

4. Gas shutoff devices are not required to be installed when the gas piping system is designed to withstand seismic forces.

5. Gas shutoff devices are not required to be installed in process piping or other equipment used in manufacturing.

1211.8.3 Design and Certification of Gas Shutoff Devices [BID]{Added}. Gas shutoff devices shall be excess flow-actuated, seismic-actuated, multi-functional, or other designs as listed by a listing agency. All such devices shall be guaranteed by the manufacturer to be free of defects and to properly operate for at least 30 years beyond the date of installation.

Exception:

The building official shall have the authority to approve or reject other devices or types of devices proposed for use on specific projects.

1211.8.4 Installation and Maintenance of Gas Shutoff Devices [BID]{Added}. Gas shutoff devices shall be installed in gas piping systems, including those systems intended for use with liquefied petroleum gas, by a contractor licensed in the appropriate classification by the state and in accordance with the manufacturer's instructions.

Seismic-actuated shutoff devices shall be installed downstream of the gas utility' meter or the liquid petroleum, tank on each fuel line that serves the building.

Excess flow-actuated shutoff devices shall be installed downstream of the gas utility meter or the liquid petroleum tank on each fuel line that serves the building and at each gas appliance within the building.

The seismic-actuated shutoff components of multi-functional shutoff devices shall be installed downstream of the gas utility meter or the liquid petroleum tank on each fuel line that serves the building and the additional components (gas leak detectors, carbon monoxide detectors, etc.) shall be installed in accordance with the manufacturer's instructions.

With respect to residential buildings, the major remodeling of an individual condominium or apartment unit shall require that a gas shutoff device be installed in the fuel gas line or lines serving that unit, but shall not require that gas shutoff devices be. installed in other fuel gas lines serving that building.

With respect to commercial and industrial buildings, the major remodeling of an individual unit or tenant space within such buildings shall require that gas shutoff devices be installed in each fuel gas line serving that building.

Whenever gas shutoff devices are installed as required by this section, the said devices shall either be maintained for the life of the building or structure, or they shall be replaced with devices complying with the requirements of this section.

(Ord. No. 2025-72, Exh. B, 12-16-25)