Chapter 6 — WATER SUPPLY AND DISTRIBUTION
604.7 Malleable Iron Fittings.
California Plumbing Code (Title 24, Part 5) · 2025 edition · updated 2026-09-12 · California
Italicized text is a California amendment to the model code, as printed in the official publication.
Malleable iron water fittings shall be galvanized.
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Ask AI about this code▸Contents — California Plumbing Code (Title 24, Part 5)
California Plumbing Code (Title 24, Part 5)
- Chapter 1 — GENERAL CODE PROVISIONS
- Chapter 2 — DEFINITIONS
- Chapter 3 — GENERAL REGULATIONS
- Chapter 4 — PLUMBING FIXTURES AND FIXTURE FITTINGS
- Chapter 5 — WATER HEATERS
▸Chapter 6 — WATER SUPPLY AND DISTRIBUTION
Overview- 601.1 Applicability.
- 601.2 Water Supply and Flushing.
- 601.3 Identification of a Potable and Nonpotable Water System.
- 601.4 Schools of Cosmetology and Cosmetological
- 601.5 Meat and Poultry Processing Plants.
- 601.6 Collection Centers and Facilities. [AGR]
- 601.7 Renderers. [AGR]
- 601.8 Horse Meat and Pet Food Establishments. [AGR]
- 602.1 Prohibited Installation.
- 602.2 Cross-Contamination.
- 602.3 Backflow Prevention.
- 602.4 Approval by Authority.
- 603.1 General.
- 603.2 Approval of Devices or Assemblies.
- 603.3 Backflow Prevention Devices, Assemblies, and Methods.
- 603.4 General Requirements.
- 603.5 Specific Requirements.
- 604.1 Pipe, Tube, and Fittings.
- 604.2 Lead Content.
- 604.3 Copper or Copper Alloy Tube.
- 604.4 Hard-Drawn Copper or Copper Alloy Tubing.
- 604.5 Flexible Connectors.
- 604.6 Cast-Iron Fittings.
- 604.7 Malleable Iron Fittings.
- 604.8 Previously Used Piping and Tubing.
- 604.9 Epoxy Coating.
- 604.10 Plastic Materials.
- 604.11 Solder.
- 604.12 Flexible Corrugated Connectors.
- 604.13 Water Heater Connectors.
- 605.1 Copper or Copper Alloy Pipe, Tubing,
- 605.2 CPVC Plastic Pipe and Joints.
- 605.3 CPVC/AL/CPVC Plastic Pipe and Joints.
- 605.4 Ductile Iron Pipe and Joints.
- 605.5 Galvanized Steel Pipe and Joints.
- 605.6 PE
- 605.7 PE-AL-PE Plastic
- 605.8 PE-RT.
- 605.9 PEX
- 605.10 PEX-AL-PEX Plastic Tubing and Joints.
- 605.11 Polypropylene (PP) Piping and Joints.
- 605.12 PVC
- 605.13 Stainless Steel Pipe
- 605.14 Slip Joints.
- 605.15 Dielectric Unions.
- 605.16 Joints Between Various Materials.
- 606.1 General.
- 606.2 Fullway Valve.
- 606.3 Multidwelling Units.
- 606.4 Multiple Openings.
- 606.5 Control Valve.
- 606.6 Accessible.
- 606.7 Multiple Fixtures.
- 606.8 [OSHPD 1, 1R, 2, 3, 4 & 5]
- 606.9 Check Valve Required.
- 606.10 Leak Detection Devices.
- 607.1 General.
- 607.2 Private Well Water Tanks.
- 607.3 Potable Water Tanks.
- 607.4 Venting.
- 607.5 Overflow.
- 607.6 Valves.
- 608.1 Inadequate Water Pressure.
- 608.2 Excessive Water Pressure.
- 608.3 Expansion Tanks, and Combination Tempera-ture and Pressu…
- 608.4 Pressure Relief Valves.
- 608.5 Discharge Piping.
- 608.6 Water-Heating Devices.
- 608.7 Vacuum Relief Valves.
- 609.1 Installation.
- 609.2 Trenches.
- 609.3 Under Concrete Slab.
- 609.4 Testing.
- 609.5 Unions.
- 609.6 Location.
- 609.7 Abutting Lot.
- 609.8 Pumps.
- 609.9 Low-Pressure Cutoff Required on Booster Pumps for Water …
- 609.10 Disinfection of Potable Water System.
- 609.11 Water Hammer.
- 609.12 Pipe Insulation.
- 610.1 Size.
- 610.2 Pressure Loss.
- 610.3 Quantity of Water.
- 610.4 Sizing Water Supply and Distribution Systems.
- 610.5 Sizing per Appendices A, C,
- 610.6 Friction and Pressure Loss.
- 610.7 Conditions for Using Table 610.4.
- 610.8 Size of Meter and Building Supply Pipe Using Table 610.4.
- 610.9 Size of Branches.
- 610.10 Sizing for Flushometer Valves.
- 610.11 Sizing Systems for Flushometer Tanks.
- 610.12 Sizing for Velocity.
- 610.13 Exceptions.
- 611.1 Application.
- 611.2 Air Gap Discharge.
- 611.3 Connection Tubing.
- 611.4 Sizing of Residential Softeners.
- 612.1 Installation.
- 613.1 The domestic water-heating equipment and distribu-
- 613.2 At least two pieces of hot-water-heating equipment shall
- 613.3 Instantaneous heaters are permitted for supplying hot
- 613.4 Water storage tanks shall be fabricated of corrosion-
- 613.5 Temperature control valves shall be provided to auto-
- 613.6 Hot-water distribution system serving patient care areas
- 613.7 At fixtures where water exceeding 125°F (52°C) is acces-
- 613.8 Sectionalizing valves shall be provided as required by S…
- 613.9 Hot water distribution shall include test ports and valved
- 614.1 Dialysis water feedlines shall be CPVC (chlorinated
- 614.2 All piping for multistation or central dialysis units sh…
- 614.3 All valves shall be located in accessible locations.
- 614.4 Piping and valves shall be identified according to their…
- 614.5 A means of preventing backwashing or flushing of the
- 614.6 A continuous audible alarm shall sound at the nurses’
- 614.7 Water treatment equipment and water used for dialysis
- 614.8 A diagram of all piping as installed shall be posted at …
- 615.1 Uses Not Permitted.
- 615.2 [OSHPD 1, 1R, 2, 3, 4 & 5]
- 615.3 [OSHPD 1, 1R, 2, 3, 4 & 5]
- 616.1 For new acute care hospital buildings submitted after
- 616.2 The emergency supply of water shall be provided at ade-
- 616.3 Storage tank connections and circulation shall be
- Chapter 7 — SANITARY DRAINAGE
- Chapter 8 — INDIRECT WASTES
- Chapter 9 — VENTS
- Chapter 10 — TRAPS AND INTERCEPTORS
- Chapter 11 — STORM DRAINAGE
- Chapter 12 — FUEL GAS PIPING
- Chapter 13 — HEALTH CARE FACILITIES AND MEDICAL GAS AND MEDICA…
- Chapter 14 — FIRESTOP PROTECTION
- Chapter 15 — ALTERNATE WATER SOURCES FOR NONPOTABLE APPLICATIONS
- Chapter 16 — NONPOTABLE RAINWATER CATCHMENT SYSTEMS
- Chapter 17 — REFERENCED STANDARDS
- Appendix A — RECOMMENDED RULES FOR SIZING THE WATER SUPPLY SYS…
- Appendix B — EXPLANATORY NOTES ON COMBINATION WASTE AND VENT S…
- Appendix C — ALTERNATE PLUMBING SYSTEMS
- Appendix D — SIZING STORM WATER DRAINAGE SYSTEMS
- Appendix E — MANUFACTURED/MOBILE HOME PARKS AND RECREATIONAL V…
- Appendix F — FIREFIGHTER BREATHING AIR REPLENISHMENT SYSTEMS
- Appendix G — SIZING OF VENTING SYSTEMS
- Appendix H — PRIVATE SEWAGE DISPOSAL SYSTEMS
- Appendix I — INSTALLATION STANDARDS
- Appendix J — COMBINATION OF INDOOR AND OUTDOOR COMBUSTION AND …
- Appendix K — POTABLE RAINWATER CATCHMENT SYSTEMS
- Appendix L — SUSTAINABLE PRACTICES
- Appendix M — PEAK WATER DEMAND CALCULATOR
- Appendix N — IMPACT OF WATER TEMPERATURE ON THE POTENTIAL FOR …
- Appendix O — NON-SEWERED SANITATION SYSTEMS
- Appendix P — PROFESSIONAL QUALIFICATIONS
- Appendix Q — INDOOR HORTICULTURAL FACILITIES
- Appendix R — TINY HOUSES
- Appendix S — ONSITE STORMWATER TREATMENT SYSTEMS