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Chapter 3 — GENERAL REGULATIONS

317.0 Food-Handling Establishments.317.1 General.

California Plumbing Code (Title 24, Part 5) · 2019 edition · updated 2026-09-10 · California

Italicized text is a California amendment to the model code, as printed in the official publication.

Food or drink shall not be stored, prepared, or displayed beneath soil or drain pipes unless those areas are protected against leakage or condensation from such pipes reaching the food or drink as described below. Where building design requires that soil or drain pipes be located over such areas, the installation shall be made with the least possible number of

TABLE 313.3 HANGERS AND SUPPORTS

MATERIALS TYPES OF JOINTS HORIZONTAL VERTICAL
Cast
 Lead and Oakum
 5 feet, except 10 feet where 10 foot
lengths are installed1, 2, 3
 Base and each floor,
not to exceed 15 feet
Cast
 Compression Gasket
Every other joint, unless over 4 feet
then support each joint1, 2, 3
Base and each floor,
not to exceed 15 feet
Cast-Iron Hubless
 Shielded Coupling
Every other joint, unless over 4 feet
then support each joint1,2,3,4
Base and each floor,
not to exceed 15 feet
Copper & Copper
Alloys
 Soldered, Brazed, Threaded, or
Mechanical
11⁄2 inches and smaller, 6 feet;
2 inches and larger, 10 feet
Each floor, not to exceed 10 feet5

Steel Pipe for Water or
DWV
 Threaded or Welded
3⁄4 inch and smaller, 10 feet;
1 inch and larger, 12 feet
 Every other floor,
not to exceed 25 feet5
Steel Pipe for Gas
 Threaded or Welded
1⁄2 inch, 6 feet;3⁄4 inch and 1 inch,
8 feet; 11⁄4 inches and larger, 10 feet
½ inch, 6 feet;¾ inch and 1 inch,
8 feet; 1¼ inches every floor level
Schedule 40 PVC and
ABS DWV
 Solvent Cemented
All sizes, 4 feet; allow
for expansion every 30 feet3

Base and each floor; provide
mid-story guides; provide
for expansion every 30 feet
CPVC
 Solvent Cemented
 1 inch and smaller, 3 feet;
11⁄4 inches and larger, 4 feet
Base and each floor;
provide mid-story guides
CPVC-AL-CPVC
 Solvent Cemented
1/2 inch, 5 feet;3/4 inch, 65 inches;
1 inch, 6 feet
Base and each floor;
provide mid-story guide
Lead
 Wiped or Burned
Continuous Support
Not to exceed 4 feet
Steel
Mechanical

In accordance with standards acceptable to the Authority Having Jurisdiction

In accordance with standards acceptable to the Authority Having Jurisdiction

PEX		 Cold Expansion, Insert
and Compression
1 inch and smaller, 32 inches;
11⁄4 inches and larger, 4 feet
Base and each floor;
provide mid-story guides
PEX-AL-PEX
Metal Insert and Metal
Compression
1⁄2 inch
3⁄4 inch
1 inch All sizes 98 inches
Base and each floor;
provide mid-story guides
PE-AL-PE
 Metal Insert and Metal
Compression
1⁄2 inch
3⁄4 inch
1 inch All sizes 98 inches
 Base and each floor;
provide mid-story guides
PE-RT Insert and Compression
1 inch and smaller, 32 inches;
11⁄4 inches and larger, 4 feet		 Base and each floor;
provide mid-story guides

Polypropylene (PP)
Fusion weld (socket, butt, sad-
dle, electrofusion), threaded
(metal threads only), or
mechanical
1 inch and smaller, 32 inches;
11⁄4 inches and larger, 4 feet
Base and each floor;
provide mid-story guides

Notes:

Notes:

1 Support adjacent to joint, not to exceed 18 inches (457 mm).

2 Brace not to exceed 40 foot (12 192 mm) intervals to prevent horizontal movement.

3 Support at each horizontal branch connection.

4 Hangers shall not be placed on the coupling.

5 Vertical water lines shall be permitted to be supported in accordance with recognized engineering principles with regard to expansion and contraction, where first approved by the Authority Having Jurisdiction.

52 2019 CALIFORNIA PLUMBING CODE

GENERAL REGULATIONS

joints and shall be installed to connect to the nearest adequately sized vertical stack with the provisions as follows: (1) Openings through floors over such areas shall be sealed

watertight to the floor construction.

(1) Openings through floors over such areas shall be sealed

watertight to the floor construction. (2) Floor and shower drains installed above such areas shall

be equipped with integral seepage pans.

(2) Floor and shower drains installed above such areas shall

be equipped with integral seepage pans. (3) Soil or drain pipes shall be of an approved material as

listed in Table 1701.1 and Section 701.2. Materials shall

(3) Soil or drain pipes shall be of an approved material as

listed in Table 1701.1 and Section 701.2. Materials shall comply with established standards. Cleanouts shall be extended through the floor construction above. (4) Piping subject to operation at temperatures that will form

condensation on the exterior of the pipe shall be ther

(4) Piping subject to operation at temperatures that will form

condensation on the exterior of the pipe shall be thermally insulated. (5) Where pipes are installed in ceilings above such areas,

the ceiling shall be of the removable type or shall be pro

Where pipes are installed in ceilings above such areas,

the ceiling shall be of the removable type or shall be provided with access panels to form a ready access for inspection of piping.

(3) Sewage ejector pumps. (4) Sump pumps and drainage pumps. (5) Domestic water heating equipment and their controls. (6) Fuel pumps. (7) Grease removal devices requiring electrical power.

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▸Contents — California Plumbing Code (Title 24, Part 5)
California Plumbing Code (Title 24, Part 5)
  1. Chapter 1 — GENERAL CODE PROVISIONS
  2. Chapter 2 — DEFINITIONS
  3. ▸Chapter 3 — GENERAL REGULATIONS
    Overview
    1. 301.2 Minimum Standards. Pipe, pipe fittings, traps, fixtures,…
    2. 301.3 Alternate Materials and Methods of Construc-
    3. 301.4 Flood Hazard Areas. Plumbing systems shall be
    4. 301.5 Alternative Engineered Design. An alternative
    5. 301.6 One- and Two-Family Dwellings. [HCD 1] The
    6. 303.0 Disposal of Liquid Waste.303.1 General. It shall be unla…
    7. 304.0 Connections to Plumbing System Required.304.1 General. P…
    8. 305.0 Damage to Drainage System or Public Sewer.305.1 Unlawful…
    9. 306.2 Safe Discharge. Sewage or other waste from a
    10. 307.2 Ownership. No subdivision, sale, or transfer of ownershi…
    11. 309.2 Concealing Imperfections. It is unlawful to conceal crac…
    12. 309.3 Burred Ends. Burred ends of pipe and tubing shall
    13. 309.4 Installation Practices. Plumbing systems shall be
    14. 309.5 Sound Transmission. Plumbing piping systems
    15. 310.2 Drainage and Vent Piping. No drainage or vent
    16. 310.3 Waste Connection. No waste connection shall be
    17. 310.4 Use of Vent and Waste Pipes. Except as hereinafter provi…
    18. 310.5 Obstruction of Flow. No fitting, fixture and piping
    19. 310.6 Dissimilar Metals. Except for necessary valves,
    20. 310.7 Direction of Flow. Valves, pipes, and fittings shall be
    21. 310.8 Screwed Fittings. Screwed fittings shall be ABS,
    22. 310.9 [OSHPD 1, 1R, 2, 3, 4 & 5] Drainage piping over
    23. 310.10 [OSHPD 1, 1R, 3, 4 & 5] Floor drains, waste traps
    24. 310.11 [SFM] For applications listed in Section 1.11.0 reg-
    25. 310.12 [OSHPD 1, 1R, 2, 4 & 5] Services/Systems andUtilities. …
    26. 310.13 Telephone and Data Equipment Rooms[OSHPD 1, 1R, 4 & 5].…
    27. 311.0 Independent Systems.311.1 General. The drainage system o…
    28. 312.2 Installation. Piping in connection with a plumbing
    29. 312.3 Building Sewer and Drainage Piping. No building sewer or…
    30. 312.4 Corrosion, Erosion, and Mechanical Damage. Piping subjec…
    31. 312.5 Protectively Coated Pipe. Protectively coated pipe
    32. 312.6 Freezing Protection. No water, soil, or waste pipe
    33. 312.7 Fire-Resistant Construction. Piping penetrations
    34. 312.8 Waterproofing of Openings. Joints at the roof
    35. 312.9 Steel Nail Plates. Plastic and copper or copper alloy
    36. 312.10 Sleeves. Sleeves shall be provided to protect piping th…
    37. 312.11 Structural Members. A structural member weakened or imp…
    38. 312.12 Rodentproofing. Strainer plates on drain inlets
    39. 313.2 Material. Hangers and anchors shall be of sufficient
    40. 313.3 Suspended Piping. Suspended piping shall be supported at…
    41. 313.4 Alignment. Piping shall be supported in such a manner as…
    42. 313.5 Underground Installation. Piping in the ground
    43. 313.6 Hanger Rod Sizes. Hanger rod sizes shall be not
    44. 314.2 Tunneling and Driving. Tunneling and driving shall
    45. 314.3 Open Trenches. Excavations required to be made
    46. 314.4 Excavations. Excavations shall be completely backfilled …
    47. 313.7 Gas Piping. Gas piping shall be supported by metal
    48. 313.8 [OSHPD 1, 1R, 2, 3, 4 & 5] Refer to Title 24, Part 2
    49. 315.2 Prohibited Joints and Connections. A fitting or
    50. 317.0 Food-Handling Establishments.317.1 General. Food or drin…
    51. 318.2 Pressure Tests (10 psi or less). Required pressure tests…
    52. 318.3 Pressure Tests (greater than 10 psi to 100 psi).
    53. 318.4 Pressure Tests (exceeding 100 psi). Required
    54. 318.5 Pressure Range. Test gauges shall have a pressure
    55. 321.0 Essential Plumbing Provisions. [OSHPD 1, 1R,2, 3 (surgic…
  4. Chapter 4 — PLUMBING FIXTURES AND FIXTURE FITTINGS
  5. Chapter 5 — WATER HEATERS
  6. Chapter 6 — WATER SUPPLY AND DISTRIBUTION
  7. Chapter 7 — SANITARY DRAINAGE
  8. Chapter 8 — INDIRECT WASTES
  9. Chapter 9 — VENTS
  10. Chapter 10 — TRAPS AND INTERCEPTORS
  11. Chapter 11 — STORM DRAINAGE
  12. Chapter 12 — FUEL GAS PIPING
  13. Chapter 13 — HEALTH CARE FACILITIES AND MEDICAL GAS AND MEDICA…
  14. Chapter 14 — FIRESTOP PROTECTION
  15. Chapter 15 — ALTERNATE WATER SOURCES FOR NONPOTABLE APPLICATIONS
  16. Chapter 16 — NONPOTABLE RAINWATER CATCHMENT SYSTEMS
  17. Chapter 17 — REFERENCED STANDARDS
  18. Appendix A — RECOMMENDED RULES FOR SIZING THE WATER SUPPLY SYS…
  19. Appendix B — EXPLANATORY NOTES ON COMBINATION WASTE AND VENT S…
  20. Appendix C — ALTERNATE PLUMBING SYSTEMS
  21. Appendix D — SIZING STORM WATER DRAINAGE SYSTEMS
  22. Appendix E — MANUFACTURED/MOBILE HOME PARKS AND RECREATIONAL V…
  23. Appendix F — FIREFIGHTER BREATHING AIR REPLENISHMENT SYSTEMS
  24. Appendix G — SIZING OF VENTING SYSTEMS
  25. Appendix H — PRIVATE SEWAGE DISPOSAL SYSTEMS
  26. Appendix I — INSTALLATION STANDARD FOR PEX TUBING SYSTEMS FOR …
  27. Appendix J — COMBINATION OF INDOOR AND OUTDOOR COMBUSTION AND …
  28. Appendix K — POTABLE RAINWATER CATCHMENT SYSTEMS
  29. Appendix L — SUSTAINABLE PRACTICES
  30. Appendix M — PEAK WATER DEMAND CALCULATOR

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