What are the rules for pumps, filters and treatment equipment?

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

• CPC § 6.4 High relevance — show source text

  For pools constructed on or after January 1, 2013, pool equipment shall be enclosed as follows: 1. All equipment installed for recirculation, filtration and disinfection of pool water shall be installed so that access is limited to persons authorized by the pool owner or operator; and 2. Pool equipment shall be mounted on a continuous slab of concrete or other equivalent easily cleanable and nonabsorbent material; and 3. Floors shall be sloped a minimum of [1] / 4 inch (6.4 mm) per foot to a drain.

  2025 CALIFORNIA BUILDING CODE 31B-11

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

  PUBLIC POOLS

  SECTION 3123B—GENERAL REQUIREMENTS

  3123B.1 System description. Each pool shall be provided with a separate recirculation system designed for the continuous recircula- tion, filtration and disinfection of the pool water. The system shall consist of pumps, filters, chemical feeders, skimmers or perimeter overflow systems, valves, pipes, connections, fittings and appurtenances.

  Exception: Pools using fresh water equivalent in flow to the requirements of Section 3124B.

  Note: Fresh makeup pool water shall conform to the water quality standards of Section 65531, Chapter 20, Title 22, California Code of Regulations.

  3123B.2 Equipment. All pumps, filters, chemical feeders, skimmers and supplemental equipment shall comply with the applicable requirements established by the NSF/ANSI 50-2012 performance standard effective September 2012.

  3123B.3 Installation. All equipment related to pool operations shall be installed and maintained according to this chapter and in accor- dance with the equipment manufacturer’s written instructions.

  3123B.4 Equipment access. All filters, valves, pumps, strainers and equipment shall be readily accessible for repair and replacement.

  SECTION 3124B—TURNOVER TIME

  The recirculation system shall have the capacity to provide a complete turnover of pool water in: 1. One-half hour or less for a spa pool; and 2. One-half hour or less for a spray ground; and 3. One hour or less for a wading pool; and 4. Two hours or less for a medical pool; and 5. Six hours or less for all other types of public pools.

  SECTION 3125B—RECIRCULATION PIPING SYSTEM AND COMPONENTS

  3125B.1 Line sizes. Pipes shall be sized so flow velocity of piping systems including all pipes and fittings other than inlet devices or venturi throats shall not exceed 6 feet per second (1.829 m/s) in any suction or copper piping and 8 feet per second (2.438 m/s) in any portion of the return system.

  3125B.1.1 Materials. All piping, tubing and fittings shall comply with the applicable standards for potable water system materials set forth in Chapter 6 of the California Plumbing Code.

• CPC § 3130B.1 High relevance — show source text

  SECTION 3130B—DIATOMACEOUS EARTH FILTERS

  In addition to the requirements for all filters as indicated in Section 3128B, the following applies to diatomaceous earth filters.

  3130B.1 Flow rates. The filtration rate for both pressure and vacuum diatomaceous earth filters shall not exceed 2 gallons per minute per square foot (81.49 L/m per m [2] ) of filter area.

  SECTION 3131B—HIGH-RATE SAND FILTERS

  In addition to the requirements for all filters as indicated in Section 3128B, the following apply to high rate sand filters.

  3131B.1 Flow rates. Maximum and minimum flow rates for backwash and filtration shall be maintained according to the applicable requirements established by the NSF/ANSI 50-2010 performance standard effective August 2010.

  3131B.2 The filter media shall have an effective particle size between 0.40 and 0.55 mm and a uniformity coefficient not exceeding 1.75.

  3131B.3 The backwash rate for a high rate sand filter shall be a minimum of 15 gallons per minute per square foot of filter area.

  SECTION 3132B—CARTRIDGE FILTERS

  In addition to the requirements for all filters as indicated in Section 3128B, the following apply to cartridge filters.

  3132B.1 The filtration rate shall not exceed 0.375 gallons per minute per square foot of filter area.

  3132B.2 An approved wash down area equipped with potable water shall be provided in the pool equipment area with permanently installed drainage piping discharging to the public sewer or wastewater system approved by the enforcing wastewater agency. The filter vessel shall be capable of being drained and shall be equipped with an indirect drain for the purpose of draining the entire contents of the filter vessel. Drainage and backwash piping shall be considered indirect waste and installed in accordance with the requirements of Chapter 8 of the California Plumbing Code.

  3132B.3 An additional set of filter elements shall be available for installation while the existing filter elements are cleaned.

  SECTION 3133B—CHEMICAL FEEDERS

  All chemical feeders including disinfectant feeders and the auxiliary feeders used for solutions, slurries or solids, along with components such as pumps, strainers, tubing connections, tanks and injection fittings shall comply with the provisions of this section.

  3133B.1 General design requirements. The chemical feeder equipment shall: 1. Be maintained and repaired according to manufacturers’ specifications; and 2. Be constructed with an adjustable output rate device to permit repeated adjustments without loss of output rate accuracy and adjusted by an automatic chemical monitoring and control system that regulates, at a minimum, pH and disinfectant; and 3. Meet the applicable requirements established by the NSF/ANSI 50-2012 performance standard effective September 2012.

  3133B.2 Piping. Piping used for the chemical feeder and its auxiliary equipment shall be resistant to corrosion or chemical deterioration.

  3133B.3 Installation. Chemical feeders and associated components shall be constructed and installed to prevent uncontrolled discharge or siphoning of chemicals and fumes directly into the pool, its recirculation system, the pool area or ancillary facilities.

  2025 CALIFORNIA BUILDING CODE 31B-13

• CPC § 0.3 High relevance — show source text

  (3) Filters shall be efficient to 0.3 µ and 99.97 percent HEPA or better, per DOE-STD-3020.

  (4) Filtration shall be sized for 100 percent of the peak calculated demand while one filter or filter bundle is iso lated.

  (5) It shall be permitted to group multiple filters into bundles to achieve the required capacities.

  (6) The system shall be provided with isolation valves on the source side of each filter or filter bundle and isolation valves on the patient side of each filter or filter bundle, permitting the filters to be isolated without shutting off flow to the central supply system.

  (7) A means shall be available to allow the user to observe any accumulations of liquids.

  2025 CALIFORNIA PLUMBING CODE 281

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  HEALTH CARE FACILITIES AND MEDICAL GAS AND MEDICAL VACUUM SYSTEMS

  (8) A vacuum relief petcock shall be provided to allow vacuum to be relieved in the filter canister during filter replacement.

  (9) Filter elements and canisters shall be permitted to be constructed of materials as deemed suitable by the manufacturer.

  (10)In normal operation, one filter or filter bundle shall be isolated from the system to be available for service should a blockage in the operating filter occur or rotation of the filters be desired after filter element exchange.

  [NFPA 99:5.1.3.7.4] 1312.5 Piping Arrangement and Redundancies. Piping arrangement shall be as follows:

  (1) Piping shall be arranged to allow service and a continuous supply of medical-surgical vacuum in the event of a single fault failure.

  (2) Piping arrangement shall be permitted to vary based on the technology(ies) employed, provided that an equal level of operating redundancy is maintained.

  (3) Where only one set of vacuum pumps is available for a combined medical-surgical vacuum system and an analysis, a research, or a teaching laboratory vacuum system, such laboratories shall be connected separately from the medical-surgical system directly to the receiver tank through its own isolation valve and fluid trap located at the receiver, and between the isolation valve and fluid trap, a scrubber shall be permitted to be installed. [NFPA 99:5.1.3.7.5, 5.1.3.7.5.1] 1312.6 Piping Serviceability. The medical-surgical vacuum receiver(s) shall be serviceable without shutting down the medical-surgical vacuum system by any method to ensure continuation of service to the facility’s medical-surgical pipeline distribution system. [NFPA 99:5.1.3.7.5.2] 1312.7 Shutoff Valve. Medical-surgical vacuum central supply systems shall be provided with a source shutoff valve per Section 1314.6. [NFPA 99:5.1.3.7.5.3]

  1313.0 Medical-Surgical Vacuum Exhaust. 1313.1 Vacuum Source Exhausts. The medical-surgical vacuum pumps shall exhaust in a manner and location that minimizes the hazards of noise and contamination to the facility and its environment. [NFPA 99:5.1.3.7.7.1]

  1313.2 Location. The exhaust shall be located as follows:

  (1) Outdoors.

• CPC § 1319.0 Medium relevance — show source text

  (4) Vacuum receiver.

  (5) Piping between the vacuum pump(s), discharge(s), receiver(s), and vacuum source shutoff valve in accordance with Section 1319.0, except brass, galvanized, or black steel pipe, which is permitted to be used as recommended by the manufacturer.

  (6) Except as defined in Section 1312.2(1) through Section 1312.2(5), materials and devices used between the medical vacuum exhaust and the medical vacuum source that are permitted to be of any design or construction appropriate for the service as determined by the manufacturer.

  (7) Vacuum filtration per Section 1312.4. [NFPA 99:5.1.3.7.1.1]

  1312.3 Vacuum Receivers. Receivers for vacuum shall meet the following requirements:

  (1) They shall be made of materials deemed suitable by the manufacturer.

  (2) They shall comply with Section VIII.1, “Unfired Pressure Vessels,” of the ASME Boiler and Pressure Vessel Code.

  (3) They shall be capable of withstanding a gauge pressure of 60 psi (414 kPa) and 30 inch (762 mm) gauge HgV.

  (4) They shall be equipped with a manual drain.

  (5) They shall be of a capacity based on the technology of the pumps. [NFPA 99:5.1.3.7.3]

  1312.4 Vacuum Filtration. Central supply systems for vacuum other than liquid ring pumps shall be provided with inlet filtration with the following characteristics:

  (1) Filtration shall be at least duplex to allow one filter to be exchanged without impairing the vacuum system.

  (2) Filtration shall be located on the patient side of the vacuum producer.

  (3) Filters shall be efficient to 0.3 µ and 99.97 percent HEPA or better, per DOE-STD-3020.

  (4) Filtration shall be sized for 100 percent of the peak calculated demand while one filter or filter bundle is iso lated.

  (5) It shall be permitted to group multiple filters into bundles to achieve the required capacities.

  (6) The system shall be provided with isolation valves on the source side of each filter or filter bundle and isolation valves on the patient side of each filter or filter bundle, permitting the filters to be isolated without shutting off flow to the central supply system.

  (7) A means shall be available to allow the user to observe any accumulations of liquids.

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  HEALTH CARE FACILITIES AND MEDICAL GAS AND MEDICAL VACUUM SYSTEMS

  (8) A vacuum relief petcock shall be provided to allow vacuum to be relieved in the filter canister during filter replacement.

  (9) Filter elements and canisters shall be permitted to be constructed of materials as deemed suitable by the manufacturer.

  (10)In normal operation, one filter or filter bundle shall be isolated from the system to be available for service should a blockage in the operating filter occur or rotation of the filters be desired after filter element exchange.

  [NFPA 99:5.1.3.7.4] 1312.5 Piping Arrangement and Redundancies. Piping arrangement shall be as follows:

  (1) Piping shall be arranged to allow service and a continuous supply of medical-surgical vacuum in the event of a single fault failure.

• CPC § 1603.5 Medium relevance — show source text

  1603.5 Rainwater Storage Tanks . . . . . . .329

  1603.6 Location . . . . . . . . . . . . . . . . . . . .329

  1603.7 Above Grade . . . . . . . . . . . . . . . .329

  1603.8 Below Grade . . . . . . . . . . . . . . . . .329

  Table 1603.4 Minimum Water Quality . . . . . . . .330

  1603.9 Drainage and Overflow . . . . . . . . .330

  1603.10 Opening and Access Protection . . .330

  1603.11 Marking . . . . . . . . . . . . . . . . . . . . .330

  1603.12 Storage Tank Venting . . . . . . . . . .330

  1603.13 Pumps . . . . . . . . . . . . . . . . . . . . .330

  1603.14 Roof Drains . . . . . . . . . . . . . . . . . .331

  1603.15 Water Quality Devices and Equipment . . . . . . . . . . . . . . . . . .331

  1603.16 Freeze Protection . . . . . . . . . . . . .331

  1603.17 Debris Removal . . . . . . . . . . . . . .331

  1603.18 Required Filters . . . . . . . . . . . . . .331

  2025 CALIFORNIA PLUMBING CODE xlv

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  1603.19 Roof Gutters . . . . . . . . . . . . . . . . .331

  1603.20 Rainwater Diversion Valves . . . . .331

  1604.0 Signs . . . . . . . . . . . . . . . . . . . . . . .331

  1604.1 General . . . . . . . . . . . . . . . . . . . . .331

  1604.2 Commercial, Industrial,

  Institutional and Residential

  Restroom Signs . . . . . . . . . . . . . .331

  1604.3 Equipment Room Signs . . . . . . . .331

  1605.0 Inspection and Testing . . . . . . . . .331

  1605.1 General . . . . . . . . . . . . . . . . . . . . .331

  1605.2 Supply System Inspection and Test . . . . . . . . . . . . . . . . . . . .331

  1605.3 Cross-Connection Inspection and Testing . . . . . . . . . . . . . . . . . .331

  CHAPTER 17 REFERENCED STANDARDS . . .333

  1701.0 General . . . . . . . . . . . . . . . . . . . . .335

  1701.1 Standards . . . . . . . . . . . . . . . . . . .335

  Table 1701.1 Referenced Standards . . . . . . . . .335

  1701.2 Standards, Publications, Practices, and Guides . . . . . . . . .352

  Table 1701.2 Standards, Publications, Practices, and Guides . . . . . . . . .352

• CPC § 1601.5 Medium relevance — show source text

  TABLE 1601.5 MINIMUM ALTERNATE WATER SOURCE TESTING, INSPECTION, AND MAINTENANCE FREQUENCY

  DESCRIPTION	MINIMUM FREQUENCY
  Inspect and clean filters and screens, and replace (where necessary).	Every 3 months
  Inspect and verify that disinfection, filters, and water quality treatment devices and systems are operational and maintaining minimum water quality requirements as determined by the Authority Having Jurisdiction.	In accordance with manufac- turer’s instructions and the Authority Having Jurisdiction.
  Inspect and clear debris from rainwater gutters, downspouts, and roof washers.	Every 6 months
  Inspect and clear debris from the roof or another above- ground rainwater collection surfaces.	Every 6 months
  Remove tree branches and vegetation overhanging a roof or other aboveground rainwater collection surfaces.	As needed
  Inspect pumps and verify operation.	After initial installation and every 12 months thereafter
  Inspect valves and verify operation.	After initial installation and every 12 months thereafter
  Inspect pressure tanks and verify operation.	After initial installation and every 12 months thereafter
  Clear debris from and inspect storage tanks, locking devices, and verify operation.	After initial installation and every 12 months thereafter
  Inspect caution labels and marking.	After initial installation and every 12 months thereafter
  Cross-connection inspection and test.*	After initial installation and every 12 months thereafter
  Test water quality of rainwater catchment systems required by Section 1603.4 to maintain a minimum water quality.	Every 12 months. After system renovation or repair.

  • The cross-connection test shall be performed in the presence of the Authority Having Jurisdiction in accordance with the requirements of this chapter.

  1601.5.1 Maintenance Responsibility. The required maintenance and inspection of rainwater catchment systems shall be the responsibility of the property owner unless otherwise required by the Authority Having Jurisdiction.

  2025 CALIFORNIA PLUMBING CODE 327

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  NONPOTABLE RAINWATER CATCHMENT SYSTEMS

  1601.6 Operation and Maintenance Manual. An operation and maintenance manual for rainwater catchment systems required to have a permit in accordance with Section 1601.3, shall be supplied to the building owner by the system designer or installer . The operating and maintenance manual shall include the following:

  (1) Diagram(s) of the entire system and the location of system components.

  (2) Instructions for operating and maintaining the system.

  (3) Instructions on maintaining the required water quality as for rainwater catchment systems .

• CPC § 11.0 Medium 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.

  2 2025 CALIFORNIA PLUMBING CODE

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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 § 1323.13.3 Medium relevance — show source text

  2, 1323.13.3| |1326.4 - 1326.10|1326.5 - 1326.11| |1505.6 - 1505.14|1505.5 - 1505.13| |Figure 1505.10|Figure 1505.9| |1506.6 - 1506.13|1506.5 - 1506.12| |1603.3 - 1603.4|1603.4 - 1603.5| |Table 1603.4|Table 1603.5| |1603.5 - 1603.19|1603.6 - 1603.20| |1603.20|1503.2.4| |L 402.9 - L 402.11|L 402.8 - L 402.10| |L 404.9 - L 404.12|L 404.8 - L 404.11| |L 411.5, L 411.6|L 411.2, L411.3| |L 411.7|L 411.4| |L 411.9 - L 411.12|L 411.5 - L 411.8|

  xxii 2025 CALIFORNIA PLUMBING CODE

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  RELATED PUBLICATIONS AND SERVICES

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  Uniform Plumbing Code – 2024 Edition:

  The Uniform Plumbing Code is the most widely adopted plumbing code in the world. The 2024 edition contains complete “turnkey” requirements for the installation and maintenance of plumbing systems, all in one easy to use book.

  Uniform Plumbing Code Illustrated Training Manual:

  The UPC Illustrated Training Manual is an excellent reference for anyone involved in the plumbing industry. It contains an extensive definitions section and several hundred comprehensive technical diagrams and illustrations. It serves as a textbook, and it also is useful as a valuable tool for explaining the intent and use of the Code.

  Uniform Plumbing Code Study Guide:

  This book is the perfect complement to the UPC Illustrated Training Manual. Alone, it constitutes a complete self-study course for learning the UPC. It has hundreds of questions, general practice exams, and plumbing math, pipe sizing exercises and fitting identification. A big help in getting you ready for a certification exam!

  Guide to Important Code Questions to the Uniform Plumbing Code:

  An excellent reference for learning and understanding plumbing code changes and identifies code changes between editions. It is a useful tool for preparing code change proposals.

  Uniform Mechanical Code – 2024 Edition:

  The Uniform Mechanical Code contains complete requirements for the installation and maintenance of heating, ventilating, cooking and refrigeration systems.

  Uniform Mechanical Code Illustrated Training Manual:

  Contains technical diagrams and illustrations that demonstrate the intent and use of the UMC. A great reference for everyone involved in Mechanical HVACR design and installation.

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• CPC § 309.0 Medium relevance — show source text

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  IS 33

  Uniform Plumbing Code References for Ductile Iron and PVC Pressure Building Supply and Exterior Cold-Water Piping

  The following sections of the 2024 Uniform Plumbing Code apply to ductile iron and PVC pressure building supply and exterior cold-water piping.

  Chapter 3 General Regulations

  309.0 Workmanship

  312.0 Protection of Piping, Materials, and Struc tures

  313.0 Hangers, Supports, and Anchors

  314.0 Trenching, Excavation, and Backfill

  Chapter 6 Water Supply and Distribution

  604.0 Materials (water piping)

  Table 604.1 Materials for Building Supply and Water Distribution Piping and Fittings

  605.4 Ductile Iron Pipe and Joints

  605.12 PVC Plastic Pipe and Joints

  605.16.2 Plastic Pipe to Other Materials

  609.0 Installation, Testing, Unions, and Location

  Abbreviations

  IAPMO International Association of Plumbing and Mechanical Officials

  UPC Uniform Plumbing Code published by IAPMO

  AWWA American Water Works Association

  CSA Canadian Standards Association

  Applicable Standards.

  ASME B16.4 Gray Iron Threaded Fittings Classes 125 and 250

  ASTM D1785 Poly (Vinyl Chloride) (PVC) Plastic Pipe, Schedules 40, 80, and 120

  ASTM D2241 Poly (Vinyl Chloride) (PVC) Pressure-Rated Pipe (SDR Series)

  ASTM D2466 Poly (Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40

  ASTM D2467 Poly (Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 80

  ASTM F1970 Special Engineered Fittings, Appurtenances or Valves for use in Poly (Vinyl Chloride) (PVC) or Chlorinated Poly (Vinyl Chloride) (CPVC) Systems

  AWWA C110 Ductile Iron and Gray-Iron Fittings

  AWWA C111 Rubber-Gasket Joints for Ductile-Iron Pressure Pipe and Fittings

  AWWA C151 Ductile-Iron Pipe, Centrifugally Cast

  AWWA C153 Ductile-Iron Compact Fitting

  AWWA C900 Polyvinyl Chloride (PVC) Pressure Pipe and Fabricated Fittings, 4 in. through 12 in. (100 mm through 300 mm)

  AWWA C904 Crosslinked Polyethylene (PEX) Pressure Tubing, ½ in. through 3 In. (13 mm through 76 mm), for Water Service

  AWWA C907 Injection-Molded Polyvinyl Chloride (PVC) Pressure Fittings, 4 In, through 12 in (100 mm through 300 mm) for Water, Wastewater and Reclaimed Water Service

  IAPMO/

  ANSI UPC-1 Uniform Plumbing Code

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• CPC § 1601.3 Medium relevance — show source text

  2
  1601.3 & Exceptions 1 & 2
  1601.5
  1601.6
  1601.7
  1602.4_& Exceptions_
  1602.7
  1603.3
  1603.3.1 &Exception
  1603.4
  1603.4.1
  Table 1603.4
  1603.7
  1603.8
  1603.9
  1603.10_A & B_
  1603.12
  1603.20
  1604.1 - 1604.3
  1605.3
  1605.3.2
  1605.3.3|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
  1601.2
  1601.3 & Exceptions 1 & 2
  1601.5
  1601.6
  1601.7
  1602.4_& Exceptions_
  1602.7
  1603.3
  1603.3.1 &Exception
  1603.4
  1603.4.1
  Table 1603.4
  1603.7
  1603.8
  1603.9
  1603.10_A & B_
  1603.12
  1603.20
  1604.1 - 1604.3
  1605.3
  1605.3.2
  1605.3.3|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
  1601.2
  1601.3 & Exceptions 1 & 2
  1601.5
  1601.6
  1601.7
  1602.4_& Exceptions_
  1602.7
  1603.3
  1603.3.1 &Exception
  1603.4
  1603.4.1
  Table 1603.4
  1603.7
  1603.8
  1603.9
  1603.10_A & B_
  1603.12
  1603.20
  1604.1 - 1604.3
  1605.3
  1605.3.2
  1605.3.3|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
  1601.2
  1601.3 & Exceptions 1 & 2
  1601.5
  1601.6
  1601.7
  1602.4_& Exceptions_
  1602.7
  1603.3
  1603.3.1 &Exception
  1603.4
  1603.4.1
  Table 1603.4
  1603.7
  1603.8
  1603.9
  1603.

• CPC § 4.1 Medium relevance — show source text

  • 100°F
    (16°C-38°C)|1 h|6 h|2 h|12 h|6 h|24 h| |40°F-60°F
    (4°C-16°C)|2 h|12 h|4 h|24 h|12 h|48 h| |10°F- 40°F
    (-12°C+4°C)|8 h|48 h|16 h|96 h|48 h|8 days| |*If gaps or loose fits are encountered in the system, double these cure times.|*If gaps or loose fits are encountered in the system, double these cure times.|*If gaps or loose fits are encountered in the system, double these cure times.|*If gaps or loose fits are encountered in the system, double these cure times.|*If gaps or loose fits are encountered in the system, double these cure times.|*If gaps or loose fits are encountered in the system, double these cure times.|*If gaps or loose fits are encountered in the system, double these cure times.|

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  IS 33

  FIGURE 1

  LOCATION OF THRUST BLOCKS (STANDARD AND METRIC COMBINED) A COMPARISON OF THRUST-BLOCK AREAS (See Section 4.1)

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  IS 33

  FIGURE 2

  THRUST BLOCK BEARING AREA (See Section 5.2.2)

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  IS 33

  Uniform Plumbing Code References for Ductile Iron and PVC Pressure Building Supply and Exterior Cold-Water Piping

  The following sections of the 2024 Uniform Plumbing Code apply to ductile iron and PVC pressure building supply and exterior cold-water piping.

  Chapter 3 General Regulations

  309.0 Workmanship

  312.0 Protection of Piping, Materials, and Struc tures

  313.0 Hangers, Supports, and Anchors

  314.0 Trenching, Excavation, and Backfill

  Chapter 6 Water Supply and Distribution

  604.0 Materials (water piping)

  Table 604.1 Materials for Building Supply and Water Distribution Piping and Fittings

  605.4 Ductile Iron Pipe and Joints

  605.12 PVC Plastic Pipe and Joints

  605.16.2 Plastic Pipe to Other Materials

  609.0 Installation, Testing, Unions, and Location

  Abbreviations

  IAPMO International Association of Plumbing and Mechanical Officials

  UPC Uniform Plumbing Code published by IAPMO

  AWWA American Water Works Association

  CSA Canadian Standards Association

  Applicable Standards.

  ASME B16.4 Gray Iron Threaded Fittings Classes 125 and 250

  ASTM D1785 Poly (Vinyl Chloride) (PVC) Plastic Pipe, Schedules 40, 80, and 120

  ASTM D2241 Poly (Vinyl Chloride) (PVC) Pressure-Rated Pipe (SDR Series)

• CPC § 1502.3.2. High relevance — show source text

  (2) A potable water supply may be connected temporarily for the initial cross-connection test of the on-site treated non- potable gray water system as provided in Section 1502.3.2. 1506.5 Water Pressure. On-site treated non-potable gray water systems supplying water to water closets, urinals, and trap primers shall be capable of delivering not less than 15 pounds-force per square inch (psi) (103 kPa) residual pressure at the highest and most remote outlet served. Where the

  TABLE 1505.16 MINIMUM RECLAIMED (RECYCLED) WATER SOURCE TESTING, INSPECTION, AND MAINTENANCE FREQUENCY

  DESCRIPTION MINIMUM FREQUENCY*

  Inspect and clean filters and screens, and replace (where necessary). [Every 3 months.]

  Inspect pumps and verify operation. After initial installation and every 12 months thereafter.

  Inspect valves and verify operation. After initial installation and every 12 months thereafter.

  Inspect pressure tanks and verify operation. After initial installation and every 12 months thereafter.

  Clear debris from and inspect storage tanks, locking devices, and verify operation.

  After initial installation and every 12 months thereafter.

  Inspect caution labels and marking. After initial installation and every 12 months thereafter.

  * Note: Frequency is as described in this table, or more frequently as required by manufacturer’s instructions and/or the Authority Having Jurisdiction.

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  ALTERNATE WATER SOURCES FOR NONPOTABLE APPLICATIONS

  1506.10.3 Deactivation and Drainage. The on-site treated nonpotable gray water system and the potable water system within the building shall be provided with the required appurtenances (e.g., valves, air/vacuum relief valves, etc.) to allow for deactivation or drainage as required for a cross-connection test in accordance with Section 1502.3.

  1506.10.4 Near Underground Potable Water Pipe. On-site treated nonpotable gray water pipes shall be permitted to be run or laid in the same trench as potable water pipes with a 12 inch (305 mm) minimum vertical and horizontal separation where both pipe materials are approved for use within a building. Where piping materials do not meet this requirement the minimum separation shall be increased to 60 inches (1524 mm). The potable water piping shall be installed at an elevation above the on-site treated nonpotable gray water piping. 1506.10.5 Required Filters. A filter permitting the passage of particulates no larger than 100 microns (100 µm) shall be provided for on-site treated nonpotable gray water supplied to water closets, urinals, trap primers, and drip irrigation system s . 1506.10.6 Disinfection. Where the intended use of onsite treated nonpotable gray water requires disinfec- tion and/or other treatment, on-site treated nonpotable gray water shall be disinfected as needed to ensure the required water quality is obtained at the point of use. Where chlorine is used for disinfection or treatment, water shall be tested for residual chlorine in accordance with ASTM D1253.

• CPC § 101.8 High relevance — show source text

  K 101.8 Material Compatibility. In addition to the requirements of this appendix, potable rainwater catchment systems shall be constructed of materials that are compatible with the type of pipe and fitting materials and water conditions in the system.

  K 101.9 System Controls. Controls for pumps, valves, and other devices that contain mercury that come in contact with the water supply shall not be permitted.

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  APPENDIX K

  TABLE K 101.5.1 MINIMUM POTABLE RAINWATER CATCHMENT SYSTEM TESTING, INSPECTION, AND MAINTENANCE FREQUENCY

  DESCRIPTION	MINIMUM FREQUENCY
  Inspect and clean filters and screens, and replace (where necessary).	Every 3 months
  Inspect and verify that disinfection, filters and water quality treatment devices and systems are operational. Perform water quality tests in accordance with the Author- ity Having Jurisdiction.	In accordance with the manufacturer’s instructions, and the Authority Having Jurisdiction.
  Perform applicable water quality tests to verify compliance with Section K 104.3.	Every 3 months
  Perform a water quality test for E. Coli, Total Coliform, and Heterotrophic bacte- ria. For a system where 25 different people consume water from the system over a 60 day period, a water quality test for cryptosporidium shall be performed.	After initial installation and every 12 months thereafter, or as directed by the Authority Having Jurisdiction.
  Inspect and clear debris from rainwater gutters, downspouts, and roof washers.	Every 6 months
  Inspect and clear debris from the roof or other aboveground rainwater collection surface.	Every 6 months
  Remove tree branches and vegetation overhanging roof or other aboveground rain- water collection surface.	As needed
  Inspect pumps and verify operation.	After initial installation and every 12 months thereafter
  Inspect valves and verify operation.	After initial installation and every 12 months thereafter
  Inspect pressure tanks and verify operation.	After initial installation and every 12 months thereafter
  Clear debris and inspect storage tanks, locking devices, and verify operation.	After initial installation and every 12 months thereafter
  Inspect caution labels and marking.	After initial installation and every 12 months thereafter

  K 102.0 Connection.

  K 102.1 General. No water piping supplied by a potable rainwater catchment system shall be connected to a source of supply without the approval of the Authority Having Jurisdiction, Health Department, or other department having jurisdiction.

  K 102.2 Connections to Public or Private Potable Water Systems. Potable rainwater catchment systems shall have no direct connection to a public or private potable water supply or alternate water source system. Potable water from a public or private potable water system is permitted to be used as makeup water to the rainwater storage tank provided the public, or private potable water supply connection is protected by an air gap or reduced-pressure principle backflow preventer in accordance with this code. K 102.3 Backflow Prevention. The potable rainwater catchment system shall be protected against backflow in accordance with this code.

  K 103.0 Potable Rainfall Catchment System Materials.

• CPC § 1505.15. Medium relevance — show source text

  Exception s :

  (1) Water treatment is not required for gray water used in a disposal field or for subsurface or subsoil irrigation.

  (2) [DWR] Recycled water shall comply with the water quality requirements of Section 1505.15.

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  ALTERNATE WATER SOURCES FOR NONPOTABLE APPLICATIONS

  TABLE 1501.5 [BSC-CG] RECOMMENDED MINIMUM ALTERNATE WATER SOURCE TESTING, INSPECTION, AND MAINTENANCE FREQUENCY

  DESCRIPTION	MINIMUM FREQUENCY
  Inspect and clean filters and screens, and replace (where necessary).	In accordance with manufacturer’s instructions, and/or the Authority Having Jurisdiction, or every 3 months.
  Inspect and verify that disinfection, filters, and water quality treatment devices and systems are operational and maintaining minimum water qual- ity requirements as determined by the Authority Having Jurisdiction.	In accordance with manufacturer’s instructions, and the Authority Having Jurisdiction.
  Inspect pumps and verify operation.	In accordance with manufacturer’s instructions, and/or the Authority Having Jurisdiction, or after installation and every 12 months thereafter.
  Inspect valves and verify operation.	In accordance with manufacturer’s instructions, and/or Authority Having Jurisdiction, or after installation and every 12 months thereafter.
  Inspect pressure tanks and verify operation.	In accordance with manufacturer’s instructions, and/or the Authority Having Jurisdiction, or after installation and every 12 months thereafter.
  Clear debris from and inspect storage tanks, lock- ing devices, and verify operation.	In accordance with manufacturer’s instructions, and/or the Authority Having Jurisdiction, or after installation and every 12 months thereafter.
  Inspect caution labels and marking.	In accordance with manufacturer’s instructions, and/or the Authority Having Jurisdiction, or after installation and every 12 months thereafter.
  Inspect and maintain mulch basins for gray water irrigation systems.	As needed to maintain mulch depth and prevent ponding and runoff.
  Cross-connection inspection and test*	In accordance with this chapter, and/or the Authority Having Jurisdiction, or after installation and every 12 months thereafter.

  • The cross-connection test shall be performed in the presence of the Authority Having Jurisdiction in accordance with the requirements of this chapter , unless site conditions do not require it. Alternate testing requirements shall be permitted by the Authority Having Jurisdiction ..

  1501.8 Material Compatibility. Alternate water source systems shall be constructed of materials that are compatible with the type of pipe and fitting materials, water treatment, and water conditions in the system.

  1501.9 Signage. [BSC-CG, HCD 1, HCD 2 & HCD 1- AC] Signage for on-site treated nonpotable gray water shall comply with Sections 1501.9.1 and 1501.9.2. [DWR] Signage for reclaimed (recycled) water shall comply with Section 1505.13.

• CPC § 3123B.3 Medium relevance — show source text

  3123B.3 Installation. All equipment related to pool operations shall be installed and maintained according to this chapter and in accor- dance with the equipment manufacturer’s written instructions.

  3123B.4 Equipment access. All filters, valves, pumps, strainers and equipment shall be readily accessible for repair and replacement.

  SECTION 3124B—TURNOVER TIME

  The recirculation system shall have the capacity to provide a complete turnover of pool water in: 1. One-half hour or less for a spa pool; and 2. One-half hour or less for a spray ground; and 3. One hour or less for a wading pool; and 4. Two hours or less for a medical pool; and 5. Six hours or less for all other types of public pools.

  SECTION 3125B—RECIRCULATION PIPING SYSTEM AND COMPONENTS

  3125B.1 Line sizes. Pipes shall be sized so flow velocity of piping systems including all pipes and fittings other than inlet devices or venturi throats shall not exceed 6 feet per second (1.829 m/s) in any suction or copper piping and 8 feet per second (2.438 m/s) in any portion of the return system.

  3125B.1.1 Materials. All piping, tubing and fittings shall comply with the applicable standards for potable water system materials set forth in Chapter 6 of the California Plumbing Code.

  3125B.2 Gauges. A pressure and vacuum gauge shall be provided for each pump system. Each gauge shall have a scale range approxi- mately 1 [1] / 4 times the maximum anticipated working pressure or vacuum and shall be accurate within 2 percent of scale. The pressure gauge located on the filter shall be marked with the clean start up pressure reading.

  3125B.3 Flow meter. A flow meter shall be provided on each recirculation system accurate to within 10 percent of flow and installed according to the manufacturer’s written instructions with increments in the range of normal flow.

  3125B.4 Basket strainer. A basket strainer shall be provided on the suction side of the recirculation pump. A basket strainer will not be required on pumps connected to vacuum filters where the filter elements are not removed for cleaning.

  3125B.5 Backwash piping. Piping, including necessary valves conforming to Section 3125B.1, shall be provided for each filter vessel or element which requires periodic backwashing.

  3125B.6 Valves. Valves shall not be located in any deck area surrounding a pool. Valves shall be installed on all recirculation, backwash- ing and drain system lines which require shutoff isolation, adjustment or control of the rate of flow. Each valve shall be installed in the equipment area and labeled as to its purpose.

  SECTION 3126B—RECIRCULATION PUMP CAPACITY

  3126B.1 Pool recirculation pumps shall have the following total dynamic head capacities: 1. Pressure diatomaceous earth filters. At least 60 feet (18,288 mm); and

• CPC § 1603.14 Medium relevance — show source text

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  less than 15 pounds-force per square inch (psi) (103 kPa) residual pressure at the highest and most remote outlet served. Where the water pressure in the rainwater supply system within the building exceeds 80 psi (552 kPa), a pressure reducing valve reducing the pressure to 80 psi (552 kPa) or less to water outlets in the building shall be installed in accordance with this code.

  1603.14 Roof Drains. Primary and secondary roof drains, conductors, leaders, and gutters shall be designed and installed in accordance with this code.

  1603.15 Water Quality Devices and Equipment. Devices and equipment used to treat rainwater to maintain the minimum water quality requirements determined by the Authority Having Jurisdiction shall be listed or labeled (thirdparty certified) by a listing agency (accredited conformity assessment body) and approved for the intended application.

  1603.16 Freeze Protection. Tanks and piping installed in locations subject to freezing shall be provided with an approved means of freeze protection.

  1603.17 Debris Removal. The rainwater catchment conveyance system shall be equipped with a debris excluder or other approved means to prevent the accumulation of leaves, needles, other debris and sediment from entering the storage tank. Devices or methods used to remove debris or sediment

  shall be accessible and sized and installed in accordance with

  manufacturer’s installation instructions.

  1603.18 Required Filters. A filter permitting the passage of particulates not larger than 100 microns (100 µm) shall be provided for rainwater supplied to water closets, urinals, trap primers, and drip irrigation system s .

  1603.19 Roof Gutters. Gutters shall maintain a minimum slope and be sized in accordance with Section 1103.3.

  1603.20 Rainwater Diversion Valves. Rainwater diversion valves ranging from 2 inches (50 mm) through 12 inches (300 mm) in diameter shall be an approved diverter valve . Valves shall be readily accessible and include a filter located upstream of the valve when required.

  1604.0 Signs. 1604.1 General. Signs in buildings using rainwater shall be in accordance with Section 1604.2 and Section 1604.3 , and applicable requirements of the California Building Code .

  1604.2 Commercial, Industrial, Institutional and Res- idential Restroom Signs. A sign shall be installed in restrooms in commercial, industrial, and institutional occupancies , and in residential common use areas using nonpotable rainwater for water closets, urinals, or both. Signs shall comply with all applicable requirements of the Califor- nia Building Code. Each sign shall contain the following text:

  TO CONSERVE WATER, THIS BUILDING USES RAINWATER TO FLUSH TOILETS AND URINALS.

  1604.3 Equipment Room Signs. Each equipment room containing nonpotable rainwater equipment shall have a sign posted with the following wording in 1 inch (25.4 mm) let ters:

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  NONPOTABLE RAINWATER CATCHMENT SYSTEMS

• CPC § 611.0 Medium relevance — show source text

  611.0 Drinking Water Treatment Units. 611.1 Application. Drinking water treatment units shall comply with the applicable referenced standards in Table 611.1.

  611.1.1 Alkaline Water Treatment. Alkaline water treatment devices shall comply with IAPMO IGC 322.

  611.1.2 Scale Reduction Devices. Scale reduction devices shall comply with IAPMO/ANSI Z601. 611.2 Air Gap Discharge. Discharge from drinking water treatment units shall enter the drainage system through an air gap in accordance with Table 603.3.1 or an air gap device that complies with Table 603.2, NSF/ANSI 58, or IAPMO PS 65.

  611.3 Connection Tubing. The tubing to and from drinking water treatment units shall be of a size and material as recommended by the manufacturer. 611.4 Sizing of Residential Softeners. Residential-use water softeners shall be sized in accordance with Table 611.4.

  612.0 Residential Fire Sprinkler Systems. 612.1 Installation. Residential Sprinkler Systems shall be installed in compliance with the California Residential Code or the California Fire Code.

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  WATER SUPPLY AND DISTRIBUTION

  Col1	TABLE 611.1 DRINKING WATER TREATMENT UNITS	Col3	Col4
  APPLICATION	RESIDENTIAL	RESIDENTIAL	COMMERCIAL
  APPLICATION	POINT OF USE	POINT OF ENTRY	POINT OF ENTRY
  Aesthetic Contaminant Reduction (filters)	NSF/ANSI 42	NSF/ANSI 42	ASSE 1087 and NSF/ANSI 42*
  Health Related Contaminant Reduction (filters)	NSF/ANSI 53	NSF/ANSI 53	ASSE 1087 and NSF/ANSI 53*
  Water Softener	–	NSF/ANSI 44	ASSE 1087
  Ultraviolet Water Treatment	NSF/ANSI 55	NSF/ANSI 55	ASSE 1087
  Reverse Osmosis	NSF/ANSI 58	NSF/ANSI/CAN 61	ASSE 1087
  Distillation	NSF/ANSI 62	NSF/ANSI 62	ASSE 1087

   - Required for commercial modular systems only.
  

  TABLE 611.4 SIZING OF RESIDENTIAL WATER SOFTENERS [4]

  REQUIRED SIZE OF SOFTENER CONNECTION (inches)	NUMBER OF BATHROOM GROUPS SERVED1
  3⁄4	up to 22
  1	up to 43

  For SI units: 1 inch = 25 mm

• CPC § 1602.5. Medium relevance — show source text

  During an initial or subsequent_ cross-connection test, the potable and rainwater catchment water systems shall be isolated from each other and independently inspected and tested to ensure there is no crossconnection in accordance with Section 1602.5. Initial or subsequent inspections or tests shall be performed in accordance with Section 1605.3.1 through Section 1605.3.3 . 1605.3.1 Visual System Inspection. Prior to commencing the cross-connection testing, a dual system inspection shall be conducted by the Authority Having Jurisdiction and other authorities having jurisdiction as follows:

  (1) Pumps, equipment, equipment room signs, and exposed piping in an equipment room shall be checked.

  1605.3.2 Cross-Connection Test. A cross-connec- tion test shall be performed in the presence of the Authority Having Jurisdiction or other authorities having jurisdiction to determine whether a cross-connection has occurred as follows:

  (1) The potable water system shall be activated and pressurized. The rainwater catchment water system shall be shut down and completely drained.

  (2) The potable water system shall remain pressurized for a minimum period of time specified by the Authority Having Jurisdiction while the rainwater catchment water system is empty. The minimum period the rainwater catchment water system is to remain depressurized shall be determined on a caseby-case basis, taking into account the size and complexity of the potable and rainwater catchment water distribution systems, but in no case shall that period be less than 1 hour.

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  less than 15 pounds-force per square inch (psi) (103 kPa) residual pressure at the highest and most remote outlet served. Where the water pressure in the rainwater supply system within the building exceeds 80 psi (552 kPa), a pressure reducing valve reducing the pressure to 80 psi (552 kPa) or less to water outlets in the building shall be installed in accordance with this code.

  1603.14 Roof Drains. Primary and secondary roof drains, conductors, leaders, and gutters shall be designed and installed in accordance with this code.

  1603.15 Water Quality Devices and Equipment. Devices and equipment used to treat rainwater to maintain the minimum water quality requirements determined by the Authority Having Jurisdiction shall be listed or labeled (thirdparty certified) by a listing agency (accredited conformity assessment body) and approved for the intended application.

  1603.16 Freeze Protection. Tanks and piping installed in locations subject to freezing shall be provided with an approved means of freeze protection.

  1603.17 Debris Removal. The rainwater catchment conveyance system shall be equipped with a debris excluder or other approved means to prevent the accumulation of leaves, needles, other debris and sediment from entering the storage tank. Devices or methods used to remove debris or sediment

  shall be accessible and sized and installed in accordance with

  manufacturer’s installation instructions.

  1603.18 Required Filters. A filter permitting the passage of particulates not larger than 100 microns (100 µm) shall be provided for rainwater supplied to water closets, urinals, trap primers, and drip irrigation system s .

  1603.19 Roof Gutters. Gutters shall maintain a minimum slope and be sized in accordance with Section 1103.3.