CPC · California Plumbing Code

General applicability, certification, construction documents and records

This hub summarizes where the California Plumbing Code sets applicability, certification rules, required construction documents, and on‑site recordkeeping (notably §§1.1.3, 301.5, 1304.2–1304.5).

Last reviewed: July 6, 2026

Overview

This area of the California Plumbing Code (CPC) sets the scope and administrative rules that determine when and how the code applies to plumbing work throughout California (see §1.1.3 for scope). It also explains how jurisdictions treat alternative engineered designs and what must be shown on permit documents (see §301.5 and its design‑document requirements).

A distinct set of provisions governs certification, plan filing, and recordkeeping for specialty systems — most notably medical gas and vacuum systems. The CPC requires system certification (§1304.2 / §1306.0), the filing and approval of construction documents before permits are issued (§1304.3), and that as‑built plans and valve identification records remain on the site (§1304.5).

Construction‑document requirements appear throughout the code (for example, firestop penetrations at §1402.0 and certain appendix chapters such as E101.2), so plan detail and submission rules vary by chapter and system type.

In this section

Code references

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

  • CPC § 1304.1.2 High relevance — show source text

    1304.1.2 [OSHPD 1, 1R, 2, 3, 4 & 5] A medical gas source system serving an OSHPD 1, 2, 3 or 5 building shall not be located in an OSHPD 1R or OSHPD 3 build- ing. OSHPD 1R buildings may be served by an individ- ual main supply line from other OSHPD buildings, with a main line valve as per NFPA 99. [NFPA 99:5.1.4.2.1, 5.1.4.2.2, 5.1.4.3.1, 5.1.4.3.2] Valves shall be accessible and clearly labeled. Exception: A medical gas source system serving only an OSHPD 1R or 3 building may be located within it. 1304.2 Certification of Systems. Certification of medical gas and vacuum systems shall comply with the requirements of Section 1306.0.

    1304.3 Construction Documents. Before a medical gas or medical vacuum system is installed or altered in a hospital, medical facility, or clinic, duplicate construction documents shall be filed with the Authority Having Jurisdiction. Approval of the plans shall be obtained before issuance of a permit by the Authority Having Jurisdiction. 1304.3.1 Requirements. Construction documents shall show the following: (1) Plot plan of the site, drawn to scale, indicating the location of existing or new cylinder storage areas, property lines, driveways, and existing or proposed buildings. (2) Piping layout of the proposed piping system or alteration, including alarms, valves, the origin of gases, user outlets, and user inlets. The demand and loading of piping, existing or future, shall also be indicated. (3) Complete specification of materials.

    1304.4 Extent of Work. Construction documents submitted to the Authority Having Jurisdiction shall clearly indicate the nature and extent of the work proposed and shall show in detail that such work will be in accordance with the provisions of this chapter. 1304.5 Record. A record of as-built plans and valve identification records shall remain on the site.

    1305.0 System Performance. 1305.1 Required Operating Pressures. Medical gas and vacuum systems shall be capable of delivering service in the pressure ranges listed in Table 1305.1.

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    HEALTH CARE FACILITIES AND MEDICAL GAS AND MEDICAL VACUUM SYSTEMS

    TABLE 1305.1

    STANDARD DESIGNATION COLORS AND OPERATING PRESSURES FOR GAS AND VACUUM SYSTEMS

    [NFPA 99: TABLE 5.1.11]

  • CPC § 1304.1 High relevance — show source text

    1304.1 General . . . . . . . . . . . . . . . . . . . . .276

    1304.2 Certification of Systems . . . . . . . .276

    1304.3 Construction Documents . . . . . . .276

    1304.4 Extent of Work . . . . . . . . . . . . . . .276

    1304.5 Record . . . . . . . . . . . . . . . . . . . . .276

    1305.0 System Performance . . . . . . . . . .276

    1305.1 Required Operating Pressures . . .276

    Table 1305.1 Standard Designation Colors and Operating Pressures for Gas and Vacuum Systems . . . . . .277

    1305.2 Minimum Flow Rates . . . . . . . . . .277

    1305.3 Minimum Station Outlets

    and Inlets . . . . . . . . . . . . . . . . . . .277

    1306.0 System Certification . . . . . . . . . . .277

    1306.1 Certification . . . . . . . . . . . . . . . . . .277

    1306.2 Certification Tests . . . . . . . . . . . . .277

    1306.3 Report Items . . . . . . . . . . . . . . . . .277

    1306.4 Components . . . . . . . . . . . . . . . . .277

    Table 1305.2 Minimum Flow Rates . . . . . . . . . .277

    Table 1305.3 Minimum Outlets and Inlets

    Per Station . . . . . . . . . . . . . . . . . .278

    PART II Category 1 Piped Gas and Vacuum Systems . . . . . . . . . . . .278

    1307.0 Central Supply Systems . . . . . . . .278

    1307.1 Terms . . . . . . . . . . . . . . . . . . . . . .278

    1307.2 Nature of Hazards of Gas

    and Vacuum Systems . . . . . . . . .278

    1307.3 Permitted Locations for

    Medical Gases . . . . . . . . . . . . . . .278

    1307.4 Materials . . . . . . . . . . . . . . . . . . . .278

    1308.0 Pressure-Regulating Equipment . .278

    1308.1 Where Required . . . . . . . . . . . . . .278

    1308.2 Pressure Relief Valves . . . . . . . . .278

    1308.3 Pressure-Relief Valve

    Requirements . . . . . . . . . . . . . . . .279

    1309.0 Oxygen Concentrator Supply Units . . . . . . . . . . . . . . . . .279

    1309.1 Oxygen Requirements . . . . . . . . .279

    1309.2 Particulate Size . . . . . . . . . . . . . . .279

    1309.3 Suitability . . . . . . . . . . . . . . . . . . .279

    1309.4 Compatible Materials . . . . . . . . . .279

    1309.5 Oxygen Concentrator Components . . . . . . . . . . . . . . . . .279

  • CPC § 301.5.1 High relevance — show source text

    301.5.1 Permit Application. The registered design professional shall indicate on the design documents that the plumbing system, or parts thereof, is an alternative engineered design so that it is noted on the construction permit application. The permit and permanent permit records shall indicate that an alternative engineered design was part of the approved installation. 301.5.2 Technical Data. The registered design professional shall submit sufficient technical data to substantiate the proposed alternative engineered design and to prove that the performance meets the intent of this code. 301.5.3 Design Documents. The registered design professional shall provide two complete sets of signed and sealed design documents for the alternative engineered design for submittal to the Authority Having Jurisdiction. The design documents shall include floor plans and a riser diagram of the work. Where appropriate, the design documents shall indicate the direction of flow, pipe sizes, grade of horizontal piping, loading, and location of fixtures and appliances. 301.5.4 Design Approval. An approval of an alternative engineered design shall be at the discretion of the Authority Having Jurisdiction. The exercise of this discretionary approval by the Authority Having Jurisdiction shall have no effect beyond the jurisdictional boundaries of said Authority Having Jurisdiction. An alternative engineered design so approved shall not be considered as in accordance with the requirements, intent, or both of this code for a purpose other than that granted by the Authority Having Jurisdiction. 301.5.5 Design Review. The Authority Having Jurisdiction shall have the authority to require testing of the alternative engineered design in accordance with Section 301.3.1, including the authority to require an independ

    ent review of the design documents by a registered design professional selected by the Authority Having Jurisdiction and at the expense of the applicant. 301.5.6 Inspection and Testing. The alternative engineered design shall be tested and inspected in accordance with the submitted testing and inspection plan and the requirements of this code. 301.6 Tall Wood (Mass Timber) Buildings. Plumbing systems installed in tall wood (mass timber) buildings, shall comply with the following:

    (1) Be designed by a licensed plumbing contractor or a registered design professional in accordance with this code and the building code.

    (2) Be designed to accommodate expansion, contraction, and differential movement between parts of a tall wood (mass timber) building in accordance with Section 312.2. 301.7 One- and Two-Family Dwellings. [HCD 1] The provisions contained in this code shall not apply to one- and two-family dwelling private sewage disposal systems and minimum plumbing facilities when alternate facilities or installations have been approved by the local health author- ity, provided that such alternative facilities or installations provide substantially equivalent or greater protection to health and safety. 301.8 OSHPD 1R. [OSHPD 1R] For OSHPD 1R, refer to Section 309 of the California Existing Building Code for gen- eral requirements.

    302.0 Iron Pipe Size (IPS) Pipe. 302.1 General. Iron, steel, copper, and copper alloy pipe shall be standard-weight iron pipe size (IPS) pipe.

    303.0 Disposal of Liquid Waste. 303.1 General. It shall be unlawful for a person to cause, suffer, or permit the disposal of sewage, human excrement, or other liquid wastes, in a place or manner, except through and by means of an approved drainage system, installed and maintained in accordance with the provisions of this code.

  • CPC § 1301.5 High relevance — show source text

    TABLE OF CONTENTS

    1301.5 Existing Systems . . . . . . . . . . . . .275

    1302.0 Design Requirements . . . . . . . . . .275

    1302.1 Risk Categories . . . . . . . . . . . . . .275

    1302.2 Patient Care Spaces . . . . . . . . . .275

    1302.3 Anesthesia . . . . . . . . . . . . . . . . . .275

    1302.4 Wet Procedure Locations . . . . . . .275

    1303.0 Health Care Facilities . . . . . . . . . .275

    1303.1 Drinking Fountain Control Valves . . . . . . . . . . . . . . . . . . . . . .275

    1303.2 Psychiatric Patient Rooms . . . . . .275

    1303.3 Locations for Ice Storage . . . . . . .276

    1303.4 Sterilizers and Bedpan Steamers . . . . . . . . . . . . . . . . . . .276

    1303.5 Aspirators . . . . . . . . . . . . . . . . . . .276

    1303.6 Drains . . . . . . . . . . . . . . . . . . . . . .276

    1303.7 Clinical Sinks . . . . . . . . . . . . . . . .276

    1303.8 Water Supply for Hospitals . . . . . .276

    1303.9 Work Performed in Occupied Healthcare Facilities . . . . . . . . . . .276

    1304.0 Medical Gas and Medical Vacuum Piping Systems . . . . . . .276

    1304.1 General . . . . . . . . . . . . . . . . . . . . .276

    1304.2 Certification of Systems . . . . . . . .276

    1304.3 Construction Documents . . . . . . .276

    1304.4 Extent of Work . . . . . . . . . . . . . . .276

    1304.5 Record . . . . . . . . . . . . . . . . . . . . .276

    1305.0 System Performance . . . . . . . . . .276

    1305.1 Required Operating Pressures . . .276

    Table 1305.1 Standard Designation Colors and Operating Pressures for Gas and Vacuum Systems . . . . . .277

    1305.2 Minimum Flow Rates . . . . . . . . . .277

    1305.3 Minimum Station Outlets

    and Inlets . . . . . . . . . . . . . . . . . . .277

    1306.0 System Certification . . . . . . . . . . .277

    1306.1 Certification . . . . . . . . . . . . . . . . . .277

    1306.2 Certification Tests . . . . . . . . . . . . .277

    1306.3 Report Items . . . . . . . . . . . . . . . . .277

    1306.4 Components . . . . . . . . . . . . . . . . .277

    Table 1305.2 Minimum Flow Rates . . . . . . . . . .277

    Table 1305.3 Minimum Outlets and Inlets

    Per Station . . . . . . . . . . . . . . . . . .278

  • CPC § 1303.7 High relevance — show source text

    1303.7 Clinical Sinks. Clinical sinks shall be installed in

    accordance with the manufacturer’s installation instructions

    and shall comply with Section 1303.7.1.

    1303.7.1 Drainage Connection. Clinical sinks shall be directly connected to the sanitary drainage system and shall be provided with approved flushing devices installed in accordance with Section 413.1.

    1303.8 Water Supply for Hospitals. Hospitals shall be provided with not less than two approved potable water sources that are installed in such a manner as to prevent the interruption of water service.

    1303.9 Work Performed in Occupied Healthcare Facilities. In existing, occupied, inpatient healthcare facilities, all plumbing systems installation and remodel work shall be performed by personnel certified in accordance with ASSE/IAPMO/ANSI 12010.

    1304.0 Medical Gas and Medical Vacuum Piping Sys- tems.

    1304.1 General. The installation of medical gas and medical vacuum piping systems shall comply with the requirements of this chapter. 1304.1.1 [OSHPD 1, 1R, 2, 3, 4 & 5] Medical gas sys- tems for health care facilities that are regulated by OSHPD (hospitals, skilled nursing facilities, and intermediate care facilities, licensed clinics, and correctional treatment cen- ters) shall be in accordance with NFPA 99, Standard for Health Care Facilities. See California Fire Code Refer- enced Standards (Chapter 80) for applicable version of the Standard. See California Building Code Table 1224.4.6.1 for location and number of station outlets for oxygen, vac- uum, and medical air.

    1304.1.2 [OSHPD 1, 1R, 2, 3, 4 & 5] A medical gas source system serving an OSHPD 1, 2, 3 or 5 building shall not be located in an OSHPD 1R or OSHPD 3 build- ing. OSHPD 1R buildings may be served by an individ- ual main supply line from other OSHPD buildings, with a main line valve as per NFPA 99. [NFPA 99:5.1.4.2.1, 5.1.4.2.2, 5.1.4.3.1, 5.1.4.3.2] Valves shall be accessible and clearly labeled. Exception: A medical gas source system serving only an OSHPD 1R or 3 building may be located within it. 1304.2 Certification of Systems. Certification of medical gas and vacuum systems shall comply with the requirements of Section 1306.0.

    1304.3 Construction Documents. Before a medical gas or medical vacuum system is installed or altered in a hospital, medical facility, or clinic, duplicate construction documents shall be filed with the Authority Having Jurisdiction. Approval of the plans shall be obtained before issuance of a permit by the Authority Having Jurisdiction. 1304.3.1 Requirements. Construction documents shall show the following: (1) Plot plan of the site, drawn to scale, indicating the location of existing or new cylinder storage areas, property lines, driveways, and existing or proposed buildings. (2) Piping layout of the proposed piping system or alteration, including alarms, valves, the origin of gases, user outlets, and user inlets.

  • CPC § 1327.7 High relevance — show source text

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

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

    CHAPTER 14 FIRESTOP PROTECTION . . . . . .303

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

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

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    TABLE OF CONTENTS

    1402.0 Construction Documents . . . . . . .305

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

    CHAPTER 15 ALTERNATE WATER SOURCES

    FOR NONPOTABLE

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

  • CPC § 1326.6 High relevance — show source text

    1326.6 Station Outlets and Inlets . . . . . . .300

    1326.7 Pressure and Vacuum

    Indicators . . . . . . . . . . . . . . . . . . .300

    1326.8 Warning Systems . . . . . . . . . . . . .300

    1326.9 Distribution . . . . . . . . . . . . . . . . . .300

    1326.10 Labeling and Identification . . . . . .300

    PART V Dental Gas and Vacuum Systems . . . . . . . . . . . . . . . . . . . .300

    1327.0 Dental Gas and Vacuum Systems . . . . . . . . . . . . . . . . . . . .300

    1327.1 General . . . . . . . . . . . . . . . . . . . . .300

    1327.2 Emergency Shutoff Valves (Oxygen and Nitrous Oxide) . . . . .300

    1327.3 Warning Systems (Oxygen and Nitrous Oxide) . . . . . . . . . . . .300

    1327.4 Initial Pressure Test . . . . . . . . . . .301

    1327.5 Maximum Copper Tube Support Spacing . . . . . . . . . . . . . .301

    Table 1327.5 Maximum Copper Tube Support Spacing . . . . . . . . . . . . . .301

    1327.6 Maximum Plastic Pipe Support Spacing . . . . . . . . . . . . . .301

    Table 1327.6 Maximum Plastic Pipe Support Spacing . . . . . . . . . . . . . .301

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

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

    CHAPTER 14 FIRESTOP PROTECTION . . . . . .303

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

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

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    TABLE OF CONTENTS

    1402.0 Construction Documents . . . . . . .305

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

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

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

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

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

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

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

  • CPC § 1.11.0. High relevance — show source text

    Agency
    Adopt Entire Chapter
    Adopt Entire Chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter/Section|BSC|BSC-
    CG|SFM|1|2|1-AC|AC|** SS**|SS/CC|1|1R|2|3|4|5|6|6|6|6|6|6|6|6|6| |Adopting Agency
    Adopt Entire Chapter
    Adopt Entire Chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter/Section|||X|||||||X|X|X|X|X|X|X||||||||| |Adopting Agency
    Adopt Entire Chapter
    Adopt Entire Chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter/Section||||||||||||||||||||||||| |Adopting Agency
    Adopt Entire Chapter
    Adopt Entire Chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter/Section||||||||||||||||||||||||| |Adopting Agency
    Adopt Entire Chapter
    Adopt Entire Chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter/Section||||||||||||||||||||||||| |Adopting Agency
    Adopt Entire Chapter
    Adopt Entire Chapter as
    amended (amended
    sections listed below)
    Adopt only those sections
    that are listed below
    Chapter/Section|||||||||||||||||||||||||

    This state agency does not adopt sections identified with the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.0.

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    CHAPTER 14

    FIRESTOP PROTECTION

    1401.0 General.

    1401.1 Applicability. Piping penetrations of required fireresistance-rated walls, partitions, floors, floor/ceiling assemblies, roof/ceiling assemblies, or shaft enclosures shall be protected in accordance with the requirements of the building code, and this chapter.

    1402.0 Construction Documents.

    1402.1 Penetrations. Construction documents shall indicate with sufficient detail how penetrations of fire-resistancerated assemblies shall be firestopped prior to obtaining design approval.

    1403.0 Installation.

    1403.1 Materials. Firestop systems shall be installed in accordance with this chapter, the building code, and the manufacturer’s installation instructions.

  • CPC § 11.0 High relevance — show source text

    11.0 - 1.11.11_|||X|||||||||||||||||||||| |1.13.0||||||||||||||||||||X||||| |Division II - Scope and
    Administration||||||||||||||||||||||||| |101.0||||||||||X|X|X||X|X|||||||||| |102.0||||||||||X|X|X||X|X|||||||||| |103.0||||||||||X|X|X||X|X|||||||||| |104.2 Items 1 & 2||||X|X|||||||||||||||||||| |104.3.1||||||||||X|X|X||X|X|||||||||| |104.4.3.1|X|||||||||||||||||||||||| |105.0||||||||||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.

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    CHAPTER 1

    ADMINISTRATION

    DIVISION I

    CALIFORNIA ADMINISTRATION

    1.1.0 General.

    1.1.1 Title. These regulations shall be known as the Califor- nia Plumbing Code, may be cited as such and will be referred to herein as “this code.” The California Plumbing Code is Part 5 of thirteen parts of the official compilation and publi- cation of the adoption, amendment, and repeal of plumbing regulations to the California Code of Regulations, Title 24, also referred to as the California Building Standards Code. This part incorporates by adoption the 2024 Uniform Plumb- ing Code of the International Association of Plumbing and Mechanical Officials with necessary California amendments.

    1.1.2 Purpose. The purpose of this code is to establish the minimum requirements to safeguard the public health, safety and general welfare through structural strength, means of egress facilities, stability, access to persons with disabilities, sanitation, adequate lighting and ventilation, and energy con- servation; safety to life and property from fire and other haz- ards attributed to the built environment; and to provide safety to fire fighters and emergency responders during emergency operations.

    1.1.3 Scope. The provisions of this code shall apply to the construction, alteration, movement, enlargement, replace- ment, repair, equipment, use and occupancy, location, main- tenance, removal, and demolition of every building or structure or any appurtenances connected or attached to such buildings or structures throughout the State of California.

  • CPC § 301.4.1 High relevance — show source text

    ** Plumbing systems shall be located above the elevation in accordance with the building code for utilities and attendant equipment or the elevation of the lowest floor, whichever is higher.

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    GENERAL REGULATIONS

    Exception: Plumbing systems shall be permitted to be located below the elevation in accordance with the building code for utilities and attendant equipment or the elevation of the lowest floor, whichever is higher, provided that the systems are designed and installed to prevent water from entering or accumulating within their components, and the systems are constructed to resist hydrostatic and hydrodynamic loads and stresses, including the effects of buoyancy, during the occurrence of flooding to such elevation. 301.4.1 Coastal High Hazard Areas. Plumbing systems in buildings located in coastal high hazard areas shall be in accordance with the requirements of Section 301.4, and plumbing systems, pipes, and fixtures shall not be mounted on or penetrate through walls that are intended to breakaway under flood loads in accordance with the California Building Code or California Resi- dential Code .

    301.5 Alternative Engineered Design. An alternative engineered design shall comply with the intent of the provisions of this code and shall provide an equivalent level of quality, strength, effectiveness, fire resistance, durability, and safety. Material, equipment, or components shall be designed and installed in accordance with the manufacturer’s installa tion instructions.

    301.5.1 Permit Application. The registered design professional shall indicate on the design documents that the plumbing system, or parts thereof, is an alternative engineered design so that it is noted on the construction permit application. The permit and permanent permit records shall indicate that an alternative engineered design was part of the approved installation. 301.5.2 Technical Data. The registered design professional shall submit sufficient technical data to substantiate the proposed alternative engineered design and to prove that the performance meets the intent of this code. 301.5.3 Design Documents. The registered design professional shall provide two complete sets of signed and sealed design documents for the alternative engineered design for submittal to the Authority Having Jurisdiction. The design documents shall include floor plans and a riser diagram of the work. Where appropriate, the design documents shall indicate the direction of flow, pipe sizes, grade of horizontal piping, loading, and location of fixtures and appliances. 301.5.4 Design Approval. An approval of an alternative engineered design shall be at the discretion of the Authority Having Jurisdiction. The exercise of this discretionary approval by the Authority Having Jurisdiction shall have no effect beyond the jurisdictional boundaries of said Authority Having Jurisdiction. An alternative engineered design so approved shall not be considered as in accordance with the requirements, intent, or both of this code for a purpose other than that granted by the Authority Having Jurisdiction. 301.5.5 Design Review. The Authority Having Jurisdiction shall have the authority to require testing of the alternative engineered design in accordance with Section 301.3.1, including the authority to require an independ

  • CPC § 17958.5 High relevance — show source text

    Amendments, additions, and_ deletions to this code adopted by a city, county, or city and county pursuant to California Health and Safety Code Sections 17958.5, 17958.7, and 18941.5, together with all applicable portions of this code, shall also become effective 180 days after publication of the Cali- fornia Building Standards Code by the California Build- ing Standards Commission.

    1.8.6.2 Findings, Filings, and Rejections of Local Mod- ifications. Prior to making any modifications or estab- lishing more restrictive building standards, the governing body shall make express findings and filings, as required by California Health and Safety Code Section 17958.7, showing that such modifications are reasonably neces- sary due to local climatic, geological, or topographical conditions. No modification shall become effective or operative unless the following requirements are met:

    1. The express findings shall be made available as a public record.

    2. A copy of the modification and express finding, each document marked to cross-reference the other, shall be filed with the California Building Standards Commission for a city, county, or a city and county, and with the Department of Housing and Commu- nity Development for fire protection districts.

    3. The California Building Standards Commission has not rejected the modification or change.

    Nothing in this section shall limit the authority of fire protection districts pursuant to California Health and Safety Code Section 13869.7(a).

    1.8.7 Alternate Materials, Designs, Tests, and Methods of Construction.

    1.8.7.1 General. The provisions of this code, as adopted by the Department of Housing and Community Develop- ment, are not intended to prevent the use of any alternate material, appliance, installation, device, arrangement, design, or method of construction not specifically pre- scribed by this code. Consideration and approval of alternates shall comply with Section 1.8.7.2 for local

    10 2025 CALIFORNIA PLUMBING CODE

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

    DIVISION I CALIFORNIA ADMINISTRATION

    building departments and Section 1.8.7.3 for the Depart- ment of Housing and Community Development.

    1.8.7.2 Local Building Departments. The building depart- ment of any city, county, or city and county may approve alternates for use in the erection, construction, recon- struction, movement, enlargement, conversion, alteration, repair, removal, demolition, or arrangement of apartments, condominiums, hotels, motels, lodging houses, dwellings, or accessory structures, except for the following:

    1. Structures located in mobilehome parks as defined in California Health and Safety Code Section 18214.

    2. Structures located in special occupancy parks as defined in California Health and Safety Code Sec- tion 18862.43.

    3. Factory-built housing as defined in California Health and Safety Code Section 19971.

    1.8.7.2.1 Approval of Alternates. The consideration and approval of alternates by a local building department shall comply with the following proce- dures and limitations:

  • CPC § 1.11.0. Medium relevance — show source text

    This state agency does not adopt sections identified with the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.0.

    2025 CALIFORNIA PLUMBING CODE 405

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

    406 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 E

    MANUFACTURED/MOBILE HOME PARKS AND RECREATIONAL VEHICLE PARKS

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

    E 101.0 Manufactured/Mobile Home Park.

    E 101.1 Applicability. The manufactured home park plumbing and drainage systems shall be designed and installed in accordance with the requirements of this appendix and the requirements of this code. E 101.2 Construction Documents. Before plumbing or sewage disposal facilities are installed or altered in a manufactured home park, duplicate construction documents shall be filed and proper permits obtained from the department or departments having jurisdiction. Plans shall show in detail:

    (1) Plot plan of the park drawn to scale, indicating elevations, property lines, driveways, existing or proposed buildings, and the sizes of manufactured home lots.

    (2) Complete specification and piping layout of proposed plumbing systems or alteration.

    (3) Complete specification and layout of proposed sewage disposal system or alteration.

    (4) The nature and extent of the work proposed, showing clearly that such work will conform to the provisions of this code.

    E 201.0 Definitions.

    E 201.1 General. For the purpose of this appendix, the following definitions shall apply: Manufactured/Mobile Home. A structure transportable in one or more sections, which in the traveling mode is 8 feet (2438 mm) or more in width and 40 feet (12 192 mm) or more in length or, where erected on-site, is 320 square feet (29.73 m [2] ) or more, and which is built on a permanent chassis, and designed to be used as a dwelling with or without a permanent foundation where connected to the required utilities. It includes the plumbing, heating, air-conditioning, and electrical systems contained therein. For further clarification of definition, see Federal Regulation 24 CFR. Manufactured/Mobile Home Accessory Building or Structure. A building or structure that is an addition to or supplements the facilities provided to a manufactured home. It is not a self-contained, separate, habitable building or structure. Examples are awnings, cabanas, ramadas, storage structures, carports, fences, windbreaks, or porches. Manufactured/Mobile Home Lot. A portion of a manufactured home park designed for the accommodation of one manufactured home and its accessory buildings or structures for the exclusive use of the occupants. Manufactured/Mobile Home Park. A parcel (or contiguous parcels) of land that has been so designated and improved that it contains two or more manufactured home lots available to the general public for the placement thereon of a manufactured home for occupancy.

Frequently asked questions

When must I submit signed and sealed design documents?

If the work is an alternative engineered design or otherwise requires a registered design professional, the CPC requires signed and sealed design documents with the permit application; see the alternative engineered design and design‑document provisions in §301.5 (including §301.5.3).

What certification and testing are required for medical gas systems?

Medical gas and vacuum systems must be certified per the CPC chapter on medical gas: §1304.2 points to the system certification requirements in §1306.0, which describe certification tests and report items.

Where should as‑built and valve identification records be kept?

For systems covered by the medical‑gas chapter, the CPC requires a record of as‑built plans and valve identification to remain on site (see §1304.5). Similar record and plan‑filing rules are found elsewhere in the code for other systems.

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