CRC · California Residential Code

What piping materials are permitted (metal, plastic, tubing)

Q: Is plastic allowed for gas piping inside the building?

No — plastic fuel‑gas piping is generally permitted only underground ; exceptions for aboveground termination are narrowly drawn (anodeless risers, wall adapters, or insertion into permitted aboveground piping), and all installations must meet the referenced standards.

Summary: The California Residential Code itself does not list permitted piping materials at § 1208.5.4 or § 1208.5.5 — it defers plumbing and fuel‑gas material rules to the California Plumbing Code and California Mechanical Code. For water systems consult CPC Table 604.1 and §§ 604.x; for gas systems consult CMC metallic and plastic piping rules (e.g., §§ 1308.4.2–1308.4.3 and E 403.7–E 403.8). Use only materials and joints listed in those codes and follow the required earth cover, clearances, and listed joining methods.

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Last reviewed: July 6, 2026

What the code requires

The California Residential Code (CRC) itself does not adopt the plumbing and fuel-gas parts that set detailed piping‑material rules; those topics are handled by the California Plumbing Code (CPC) and California Mechanical Code (CMC). Because of that delegation, the CRC text does not contain usable, operative requirements at § 1208.5.4 or § 1208.5.5 — the CRC points users to the CPC/CMC for permitted piping materials.

In practice: for water‑supply piping consult the CPC (materials table and limits); for gas piping consult the CMC (metallic and plastic pipe/tubing requirements and limits). Below summarizes the actual, controlling requirements as found in the adopted California plumbing and mechanical code sections the CRC delegates to.

The CRC defers materials rules for plumbing and fuel‑gas piping to the California Plumbing Code and California Mechanical Code — consult those codes for which metals, plastics, tubing, and joining methods are permitted.

Requirements in detail

Authority & scope (how this applies to the CRC)

The CRC does not adopt Part VI (Fuel Gas) or Part VII (Plumbing); it instructs users to the California Mechanical Code and California Plumbing Code for those subjects. If you look for operative piping‑material rules inside the CRC under § 1208.5.4 or § 1208.5.5, you will not find them — the CRC delegates to the other Title 24 parts.

Metallic pipe and tubing (general rules)

For fuel‑gas piping, metallic pipe and metallic tubing are permitted when they meet the CMC requirements: steel, stainless steel, wrought‑iron and copper (subject to material and sizing limits). See § 1308.4.2 (Metallic pipe) and § 1308.4.3 (Metallic tubing) in the California Mechanical Code for the specifics (minimum schedules, ASTM standards, and prohibitions such as cast‑iron for some applications).
Typical prohibitions and conditions in the CMC include: no cast‑iron pipe for certain gas uses; steel tubing must meet ASTM A254; copper tubing must meet ASTM B88 (Types K or L) and may be limited where corrosive gas contaminants exist.

Plastic piping and composite tubing (general rules)

Plastic piping for fuel gas is tightly limited. Plastic gas piping is generally permitted only underground and must comply with specific federal/industry standards (e.g., ASTM D2513 or similar) and pipeline design limitations; see § E 403.7 (Plastic Piping) and related installation rules. Minimum earth cover and clearances apply.
For building water supply and distribution (potable water), the CPC lists approved plastics and composite systems (CPVC, PEX, PE, etc.) in Table 604.1 and allows “approved plastic materials” in building supply piping subject to exceptions (for example, replacement of metallic pipe used for grounding). See § 604.10 and Table 604.1 in the California Plumbing Code for the allowed materials, referenced ASTM/ANSI standards, and limitations.

Joints, fittings, and joining method limits

The CPC and CMC require that joining methods be those listed or referenced for each material (solvent weld for PVC/CPVC where listed, mechanical/compression/crimp for PE/PEX per the listed ASTM standards, welded or press‑connect for stainless, etc.). See the CPC joint sections (e.g., mechanical joints for PE and PE‑AL‑PE, PE‑RT, PEX joining standards) for required installation methods and referenced ASTM standards.
Dielectric unions and compatible fittings must be used at dissimilar‑metal connections where required. See CPC joint provisions.

Quick decision table — common material choices (decision‑relevant values)

Material type	Where permitted (typical)	Key limits / threshold	Typical referenced standard(s)	Code Reference (examples)
Steel / Wrought‑iron (gas)	Indoor & outdoor gas piping (metallic systems)	Steel pipe typically Schedule 40 minimum for some uses; protect buried steel from corrosion	ASTM A53, ASTM A106, ASME B36.10M	CMC § 1308.4.2
Copper tubing (gas & water)	Water distribution (Type L typically); tubing may be used for non‑corrosive gas	CPC: water tubing Type L min; Type M allowed aboveground in some locations	ASTM B88	CPC § 604.3–604.4, Table 604.1
PE (polyethylene) — gas	Underground fuel‑gas distribution only	Plastic gas piping only underground; must meet ASTM D2513/D2517; min earth cover 18 in (457 mm); 12 in (305 mm) separation from other utilities	ASTM D2513; 49 CFR 192	CPC/CMC § E 403.7–E 403.8
PEX / PEX‑AL‑PEX / PE‑RT (water)	Building water distribution (in‑building) where listed	Must be listed and installed per manufacturer; fittings per ASTM F1807, F1974, etc.	ASTM F1807, F1974, F2389	CPC Table 604.1, CPC joints § 605.x
CPVC / PVC (water)	Building water distribution (subject to listing)	Solvent‑weld and thread rules; limited thread use for larger sizes; check pressure ratings	ASTM D2846 (CPVC), ASTM D1785/ F441 (PVC)	CPC Table 604.1, joint rules § 605.x

(These are representative examples — always confirm the precise referenced standard and code section in the CPC/CMC and manufacturer listings for the exact product and use.)

Exceptions & special cases

Plastic fuel‑gas piping terminating above ground is allowed only in limited, specifically enumerated ways (for example, with an anodeless riser or where the plastic is inserted into a permitted aboveground piping material); see the CMC/CPC exceptions to the underground‑only rule.
Materials previously used for non‑potable purposes are prohibited from reuse in potable systems (CPC § 604.8).
When metallic piping is used for electrical grounding, replacement piping must be “of like materials” unless alternate grounding is provided (CPC § 604.10).
Some special occupancies or applications (medical gas, hazardous materials piping, plenums, fire‑sprinkler piping) require listed products or additional fire/smoke performance and different codes (CMC/CPC/Fire Code lists). Consult the specific sections and referenced standards.

Common mistakes

Assuming the CRC text itself contains the fluid‑type material rules — it does not; the CRC delegates to CPC/CMC. Always check the CPC/CMC sections the CRC points to.
Installing plastic gas piping aboveground without using an approved riser or adapter — plastic gas piping is normally limited to underground installation.
Using Type M copper in concealed or underground potable water runs where the CPC requires Type L (Type M may be allowed only for aboveground or outside underground in limited cases). Check § 604.3 and the CPC exceptions.
Reusing previously used piping or fittings in potable systems (prohibited).
Failing to use listed fittings/joint methods for PEX/PE/CPVC and not following the ASTM or manufacturer installation instructions — leads to failed inspections and leaks.

Worked example — replacing a 100 ft gas service (practical)

Scenario: You will run a new buried polyethylene (PE) gas service 100 ft from the meter to an outside appliance connection.

Steps that the codes require (summary):

Confirm that plastic gas piping is acceptable for the application (it is allowed only underground and must meet the listed standards). See § E 403.7.
Select a product listed to ASTM D2513 (or other CPC/CMC‑referenced standard). Reference CPC/CMC product listing and manufacturer instructions.
Provide a minimum earth cover of 18 inches (457 mm) over the buried PE pipe; keep at least 12 inches (305 mm) clearance from other underground utilities in any direction, unless approved otherwise. These dimensional minimums come from the installation rules.
Use the required joining method and fittings listed for the PE product (electrofusion or heat fusion per ASTM F2620 or mechanical crimp/insert fittings listed to ASTM F1974/ F1807 as applicable). Follow manufacturer instructions and referenced ASTM joining standards.
Protect/coat any metallic transitions and install required dielectric fittings when mating dissimilar metals (CPC joint provisions).

Numbers summary for the example:

Run length: 100 ft (design choice).
Earth cover: ≥ 18 in (457 mm) over the PE main. Clearance ≥ 12 in (305 mm) to other utilities. Product standard: ASTM D2513. All per CMC/CPC installation sections.

Related provisions

CRC adoption note (delegation): § 1208.5.4 and § 1208.5.5 — CRC does not contain operative plumbing/fuel‑gas material rules and directs users to the CPC/CMC. See the CRC adoption notes.
Fuel‑gas piping (metallic pipe): § 1308.4.2 (California Mechanical Code) — metallic pipe requirements.
Fuel‑gas tubing (metallic tubing): § 1308.4.3 (California Mechanical Code) — tubing requirements.
Plastic gas piping (installation limits, underground only): § E 403.7 and § E 403.8 (California Plumbing/Mechanical Code appendices / NFPA‑based provisions shown in code) — material standards and minimum earth cover/clearance.
Building supply & water distribution materials: § 604.10 and Table 604.1 (California Plumbing Code) — approved materials and referenced standards.
Joints and fittings for PEX/PE/CPVC and mechanical joint requirements: CPC § 605.x (see sections on PE mechanical joints, PE‑AL‑PE, PE‑RT, PEX fittings).

If you want, I can:

Pull the exact, verbatim language from the CPC/CMC sections that will actually be enforced (I can extract and show the precise lines for the specific material you plan to use), or
Walk through product selection for a specific pipe type (brand/model) and check the referenced ASTM/ANSI listing requirements against the code text.

Code references

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

CRC § 1208.5.2 High relevance — show source text

1208.5.2 Metallic Pipe. Metallic pipe shall be in accordance with the Section 1208.5.2.1 through Section 1208.5.2.4.

1208.5.2.1 Cast Iron. Cast-iron pipe shall not be used. [NFPA 54:5.5.2.1]

1208.5.2.2 Steel, Stainless Steel, and Wrought- Iron Pipe. Steel, stainless steel, and wrought-iron pipe shall be at least Schedule 40 and shall comply

Exception: Sizing shall be permitted to be based upon established load diversity factors. [NFPA 54:5.3.2.3]

TABLE 1208.3.1

APPROXIMATE GAS INPUT FOR

TYPICAL APPLIANCES

[NFPA 54: TABLE A.5.3.2.1]

APPLIANCE	INPUT (Btu/h approx.)
Space Heating Units Warm air furnace Single family Multifamily, per unit Hydronic boiler Single family Multifamily, per unit	100 000 60 000 100 000 60 000
Space and Water Heating Units Hydronic boiler Single-family Multifamily, per unit	120 000 75 000
Water Heating Appliances Water heater, automatic storage 30 to 40 gallon tank Water heater, automatic storage 50 gallon tank Water heater, automatic instantaneous Capacity at 2 gallons per minute Capacity at 4 gallons per minute Capacity at 6 gallons per minute Water heater, domestic, circulating or side-arm	35 000 50 000 142 800 285 000 428 400 35 000
Cooking Appliances Range, freestanding, domestic Built-in oven or broiler unit, domestic Built-in top unit, domestic	65 000 25 000 40 000
Other Appliances Refrigerator Clothes dryer, Type 1 (domestic) Gas fireplace direct-vent Gas log Barbecue Gaslight	3000 35 000 40 000 80 000 40 000 2500

For SI units: 1000 British thermal units per hour = 0.293 kW

1208.3.2 Sizing Methods. Gas piping shall be sized in accordance with one of the following:

(1) Pipe sizing tables or sizing equations in this chap ter.

(2) Sizing tables included in a listed piping system manufacturer’s installation instructions.

CRC § 0.50 High relevance — show source text
(8) Materials in a hazardous fabrication area including the areas above and below the fabrication area sharing a common air recirculation path with the fabrication area.

(9) Plastic water distribution piping listed and labeled for use in plenums in accordance with UL 2846 as having a peak optical density not greater than 0.50, an average optical density not greater than 0.15, and a flame spread distance not greater than 5 feet (1524 mm), and installed in accordance with its listing, shall be permitted.

602.2.1 Electrical. Electrical wiring in plenums shall comply with the California Electrical Code . Electrical wires and cables and optical fiber cables shall be listed and labeled for use in plenums and shall have a flame spread distance not exceeding 5 feet (1524 mm), an average optical density not exceeding 0.15, and a peak optical density not exceeding 0.5, where tested in accordance with NFPA 262.

602.2.2 Fire Sprinkler Piping. Nonmetallic fire sprinkler piping in plenums shall be listed and labeled for use in plenums and shall have a flame spread distance not exceeding 5 feet (1524 mm), an average optical density not exceeding 0.15 and, a peak optical density not exceeding 0.5, where tested in accordance with UL 1887.

602.2.3 Pneumatic Tubing. Nonmetallic pneumatic tubing in plenums shall be listed and labeled for use in plenums and shall have a flame spread distance not exceeding 5 feet (1524 mm), an average optical density not exceeding 0.15, and a peak optical density not exceeding 0.5, where tested in accordance with UL 1820.

602.2.4 Discrete Products in Plenums. Discrete plumbing, mechanical, and electrical products that are located in a plenum and have exposed combustible material shall be listed and labeled in accordance with UL
602.3 Tall Wood (Mass Timber) Buildings. Duct systems installed in tall wood (mass timber) buildings shall comply with the following:

(1) Be designed by 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 316.2.

2025 CALIFORNIA MECHANICAL CODE 137

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DUCT SYSTEMS

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602.4 Metallic. Ducts, plenums, or fittings of metal shall comply with SMACNA HVAC Duct Construction Standards – Metal and Flexible. Flexible metallic ducts shall comply with UL 181.

602.5 Nonmetallic Ducts. Nonmetallic ducts shall comply with Section 602.5.1, Section 602.5.2, Section 602.5.3, Section 602.5.4, or Section 602.5.5.

602.5.1 Phenolic. Phenolic duct, plenum, or fitting material shall comply with UL 181. Ducts, plenums, or fittings of phenolic shall be constructed in accordance with SMACNA Phenolic Duct Construction Standards or the conditions of its listing.
CRC § 5.1 High relevance — show source text
Cleanouts shall be designed to be watertight and gastight.

5 Testing and Inspection Requirements

5.1 Media

The piping of the building sewer shall be tested with water. The Authority Having Jurisdiction shall be permitted to require the removal of cleanouts, etc., to ascertain whether the pressure has reached all parts of the system.

5.2 Water Test

The system shall be tested by plugging the end of the building sewer at its points of connection to the public sewer or private sewage disposal system and completely filling the building sewer with water from the lowest to the highest point thereof.

5.3 Inspections

The completed piping shall be internally inspected by camera unless waived by the Administrative Authority.

TABLE 1

CLEANOUTS (See Section 4.6.1)

NPS SIZE OF CLEANOUT
(inches) THREADS PER INCH

1.5 1.5 11.5

2 1.5 11.5

2.5 2.5 8

3 2.5 8

4 & larger 3.5 8

Note: For SI units: 1 inch = 25 mm

Uniform Plumbing Code References

The following sections of the 2024 Uniform Plumbing Code apply.

105.2 Required Inspections

105.2.2 Other Inspections

105.3 Testing of Systems

301.2 Minimum Standards

309.0 Workmanship

312.0 Protection of Piping, Materials, and Structures

314.0 Trenching, Excavation, and Backfill

701.3 Drainage Fittings

705.5.1.1 Butt Fusion Joints

705.5.1.2 Electro-Fusion Joints

705.5.1.3 Socket-Fusion Joints

723.0 Building Sewer Test

TABLE 1

CLEANOUTS (See Section 4.6.1)

The following standards from Tables 1701.1 and 1701.2 of the 2024 Uniform Plumbing Code apply.

Table 1701.1 Standards

ASTM D2239 Polyethylene (PE) Plastic Pipe (SIDRPR) Based on Controlled Inside Diameter

ASTM D2683 Socket-Type Polyethylene Fittings for Outside Diameter-Controlled Polyethylene Pipe and Tubing

ASTM D3261 Butt Heat Fusion Polyethylene (PE) Plastic Fittings for Polyethylene (PE) Plastic Pipe and Tubing

ASTM F714 Polyethylene (PE) Plastic Pipe (DRPR) Based on Outside Diameter

ASTM F894 Polyethylene (PE) Large Diameter Profile Wall Sewer and Drain Pipe

ASTM F1055 Electrofusion Type Polyethylene Fittings for Outside Diameter Controlled Polyethylene and Crosslinked Polyethylene (PEX) Pipe and Tubing

ASTM F2620 Heat Fusion Joining of Polyethylene Pipe and Fittings

Table 1701.2 Standards

ASTM D2657 Heat Fusion Joining of Polyolefin Pipe and Fittings

IAPMO PS 25 Metallic Fittings for Joining Polyethylene Pipe for Water Service and Yard Piping

Note: For SI units: 1 inch = 25 mm

2025 CALIFORNIA PLUMBING CODE 453
CRC § 604.1 High relevance — show source text
(19 mm)
through 3 in. (76 mm), for Water Service|Piping|Table 604.1| |AWWA C904-2016|Crosslinked Polyethylene (PEX) Pressure Tubing,1⁄2 in.
through 3 in. (13 mm through 76 mm), for Water Service|Piping|Table 604.1| |AWWA C907-2017|Injection-Molded Polyvinyl Chloride (PVC) Pressure Fittings,
4 in. through 12 in. (100 mm through 300 mm), for Water,
Wastewater, and Reclaimed Water Service|Fittings|Table 604.1| |CFR|CFR|CFR|CFR| |49 CFR 192.281|Plastic Pipe|Plastic, Pipe|1208.5.6.2| |49 CFR 192.283|Plastic Pipe: Qualifying Joining Procedures|Plastic, Pipe|1208.5.6.2| |CGA|CGA|CGA|CGA| |CGA G-4.1-2018|Cleaning of Equipment for Oxygen Service|Miscellaneous|1318.2, 1321.8.7| |CGA M-1-2018|Medical Gas Supply Systems at Health Care Facilities|Miscellaneous|1324.5.7.3| |CGA V-5-2019|Diameter Index Safety System (Noninterchangeable Low Pres-
sure Connections for Medical Gas Applications)|Connections|1315.5| |CISPI|CISPI|CISPI|CISPI| |CISPI 301-2021|Hubless Cast Iron Soil Pipe and Fittings for Sanitary and Storm
Drain, Waste, and Vent Piping Applications|Piping, Ferrous|301.2.4, Table 701.2,
Table 707.2| |CISPI 310-2020|Couplings for Use in Connection with Hubless Cast Iron Soil
Pipe and Fittings for Sanitary and Storm Drain, Waste, and
Vent Piping Applications|Joints|301.2.4, 705.2.2| |CSA|CSA|CSA|CSA| |ASME A112.19.2-
2018/CSA B45.1-2018|Ceramic Plumbing Fixtures|Fixtures|407.1, 408.1, 409.1,
410.1, 411.1, 412.1,
415.1, 420.1| |ASME A112.19.1-
2018/CSA B45.2-2018|Enameled Cast Iron and Enameled Steel Plumbing Fixtures|Fixtures|407.1, 408.1, 409.1,
415.1, 420.1| |ASME A112.19.3-
2017/CSA B45.4-2017|Stainless Steel Plumbing Fixtures|Fixtures|407.1, 408.1, 409.1,
410.1, 411.1, 415.1,
420.1| |CSA B45.5-2017/IAPMO
Z124-2017|Plastic Plumbing Fixtures (with Errata dated August 2017)|Fixtures|407.1, 408.1, 409.1,
CRC § 214.0. High relevance — show source text
[HCD 1 & HCD 2] Plastic pipe and fittings joined with solvent cement shall utilize Low VOC primer(s), if a primer is required, and Low VOC solvent cement(s) as defined in Section 214.0. 605.12.3 Threaded Joints. Threads shall comply with ASME B1.20.1. A minimum of Schedule 80 shall be permitted to be threaded; however, the pressure rating shall be reduced by 50 percent. The use of molded fittings shall not result in a 50 percent reduction in the pressure rating of the pipe provided that the molded fittings shall be fabricated so that the wall thickness of the material is maintained at the threads. Thread sealant compound that is compatible with the pipe and fitting, insoluble in water and nontoxic shall be applied to male threads. Caution shall be used during assembly to prevent over tightening of the PVC components once the thread sealant has been applied. Female PVC threaded fittings shall be used with plastic male threads only. 605.13 Stainless Steel Pipe and Joints. Joining methods for stainless steel pipe and fittings shall be installed in

152 2025 CALIFORNIA PLUMBING CODE

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WATER SUPPLY AND DISTRIBUTION

accordance with the manufacturer’s installation instructions and shall comply with Section 605.13.1 or Section 605.13.2. 605.13.1 Mechanical Joints. Mechanical joints shall be designed for their intended use. Such joints shall include compression, flanged, grooved, press-connect, and threaded.

605.13.2 Welded Joints. Welded joints shall be either fusion or resistance welded based on the selection of the base metal. The chemical composition of the filler metal shall comply with AWS A5.9 based on the alloy content of the piping material. 605.14 Slip Joints. In water piping, slip joints shall be permitted to be used only on the exposed fixture supply.

605.15 Dielectric Unions. Dielectric unions where installed at points of connection where there is a dissimilarity of metals shall be in accordance with ASSE 1079 or IAPMO PS 66.

[DSA-SS, HCD 1, HCD 2, OSHPD 1, 1R, 2, 3, 4 & 5] Dielectric unions shall be used at all points of connection where there is a dissimilarity of metals.

605.16 Joints Between Various Materials. Joints

between various materials shall be installed in accordance

with the manufacturer’s installation instructions and shall comply with Section 605.16.1 through Section 605.16.3. 605.16.1 Copper or Copper Alloy Pipe or Tubing to Threaded Pipe Joints. Joints from copper or copper alloy pipe or tubing to threaded pipe shall be made using copper alloy adapter, copper alloy nipple [minimum 6 inches (152 mm)], dielectric fitting, or dielectric union in accordance with ASSE 1079 or IAPMO PS 66. The joint between the copper or copper alloy pipe or tubing and the fitting shall be a soldered, brazed, flared, or press-connect joint and the connection between the threaded pipe and the fitting shall be made with a standard pipe size threaded joint. **605.16.2 Plastic Pipe to Other Materials.
CRC § 109.3 High relevance — show source text
1211

Valuation or Value (see Fees, Permit) 109.3 Vapor Diffusion Port 202 Vapor Retarders 1202.3, 1404.3, 1404.3.2 Vegetative Artificial decorative 419, 419.1 Vegetative roofs 1505.10, 1507.15 Vehicle Barrier 1607.11 Vehicle Barrier Systems 406.4.2, 1607.11 Vehicle Show Rooms 304 Vehicular Fueling 406.7 Vehicular Gates 3110 Vehicular Repair 406.8

Veneer Cement plaster 1404.16, 1411 Fastening 1404.5 Fiber-cement siding 1404.17, 1411 Glazing 1404.13, 1411 Masonry, adhered 1404.11, 2101.2.1, 2103.2.4 Masonry, anchored 1404.7, 1411, 2101.2.1

Metal 1404.12

Plastic 1411, 2605 Slab-type 1404.9, 1411

Testing Automatic fire-extinguishing systems 904.4

Automatic water mist systems 904.11.3 Building official required 104.2.3.6 Carbon dioxide systems 904.8 Clean agent system 904.10 Dry chemical systems 904.6 Emergency and standby power 2702.4 Fire alarm systems 907.7, 907.8 Fire pumps 913.5 Fire-resistant materials 703.2

Foam systems 904.7 Glazing 2406, 2408.2.1 Halon systems 904.9 Personnel and material hoists 3004.4

Roof tile 1504.3.1

Seismic 1704.2

Smoke control 909.3, 909.5.2, 909.10.2, 909.12.1, 909.13.3, 909.18, 909.20.7.3, 909.21.7, 1705.19 Soils1 803

Sound transmission 1208 Sprinkler protection 903.5 Structural (see Special Inspections and Tests) Wet chemical systems 904.5 Testing Agency (definition) 202 Theaters [see Assembly Occupancy (Group A), Projection Rooms and Stages and Platforms] Thermal Barrier, Foam Plastic Insulation 2603.4, 2603.5.2 Thermal-insulating Materials (See Insulation) 712 Tile 202 Ceramic (see Ceramic Tile) Fire resistance, clay or shale 721.1 Tires, Bulk Storage of 311.2 Toddler 202 Toilets and Toilet Rooms Chapters 11A and 11B, 3305 Accessible 1127A, 1134A, 11B-213,

1607.9.2
CRC § 5003.2.2 High relevance — show source text
5003.2.2 Piping, tubing, valves and fittings. Piping, tubing, valves, and fittings conveying hazardous materials shall be designed and installed in accordance with ASME B31.1 or other approved standards, and shall be in accordance with Sections 5003.2.2.1 and 5003.2.2.2.

5003.2.2.1 Design and construction. Piping, tubing, valves, fittings and related components used for hazardous materials shall be in accordance with the following:
1. Piping, tubing, valves, fittings and related components shall be designed and fabricated from materials that are compatible with the material to be contained and shall be of adequate strength and durability to withstand the pressure, structural and seismic stress and exposure to which they are subject.
2. Piping and tubing shall be identified in accordance with ASME A13.1 to indicate the material conveyed.
3. Manual valves or automatic remotely activated fail-safe emergency shutoff valves shall be installed on supply piping and tubing and provided with ready access at the following locations: 3.1. The point of use. 3.2. The tank, cylinder or bulk source.
4. Manual emergency shutoff valves and controls for remotely activated emergency shutoff valves shall be clearly visible, provided with ready access and identified in an approved manner.
5. Backflow prevention or check valves shall be provided where the backflow of hazardous materials could create a hazardous condition or cause the unauthorized discharge of hazardous materials.
Exceptions:
1. Piping for inlet connections designed to prevent backflow.
2. Piping for pressure relief devices.
5003.2.2.2 Additional regulations for supply piping for health-hazard materials. Supply piping and tubing for gases and liquids having a health-hazard ranking of 3 or 4 in accordance with NFPA 704 shall be in accordance with ASME B31.3 and the following:
1. Piping and tubing utilized for the transmission of highly toxic, toxic or highly volatile corrosive liquids and gases shall have welded, threaded or flanged connections throughout except for connections located within a ventilated enclo
50-12 2025 CALIFORNIA FIRE CODE

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

HAZARDOUS MATERIALS—GENERAL PROVISIONS

sure if the material is a gas, or an approved method of drainage or containment is provided for connections if the material is a liquid. 2. Piping and tubing shall not be located within corridors, within any portion of a means of egress required to be enclosed in fire-resistance-rated construction or in concealed spaces in areas not classified as Group H occupancies.

Exception: Piping and tubing within the space defined by the walls of corridors and the floor or roof above or in concealed spaces above other occupancies where installed in accordance with Section 415.11.7.4 of the California Building Code for Group H-5 occupancies.

5003.2.3 Equipment, machinery and alarms. Equipment, machinery and required detection and alarm systems associated with the use, storage or handling of hazardous materials shall be listed or approved.

5003.2.4 Installation of tanks. Installation of tanks shall be in accordance with Sections 5003.2.4.1 through 5003.2.4.2.1.
CRC § 1212.12 High relevance — show source text
vents are utilized to permit cleaning, inspection, or repair without shutting the system down.

1212.12 District Energy and Central Utility Systems. Isolation valves shall be installed on the building supply and return of a district energy or central utility system.

1213.0 System Controls. 1213.1 Water Temperature Controls. A heat source or system of commonly connected heat sources shall be protected by a water-temperature-activated operating control to stop heat out

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cent reduction in the pressure rating of the pipe provided that the molded fittings shall be fabricated so that the wall thickness of the material is maintained at the threads. Thread sealant compound that is compatible with the pipe and fitting, insoluble in water, and nontoxic shall be applied to male threads. Caution shall be used during assembly to prevent over tightening of the PVC components once the thread sealant has been applied. Female PVC threaded fittings shall be used with plastic male threads only. 1211.14 Steel Pipe and Tubing. Joints between steel pipe or tubing and fittings shall be installed in accordance with one of the following methods:

(1) Mechanical joints shall be made with an approved and listed elastomeric gasket.

(2) Threaded joints shall be made with pipe threads that are in accordance with ASME B1.20.1. Thread sealant tape or compound shall be applied only on male threads, and such material shall be of approved types, insoluble in water, and nontoxic.

(3) Welded joints shall be made by electrical arc or oxygen/acetylene method. Joint surfaces shall be cleaned by an approved procedure. Joints shall be welded by an approved filler metal.

(4) Pressed joints shall have an elastomeric O-ring that forms the connection. The pipe or tubing shall be fully inserted into the fitting, and the pipe or tubing marked at the shoulder of the fittings. Pipe or tubing shall be cut square, chamfered, and reamed to full inside diameter. The fitting alignment shall be checked against the mark on the pipe or tubing to ensure the pipe or tubing is fully inserted into the fitting. The joint shall be pressed using the tool recommended by the manufacturer. 1211.15 Stainless Steel Pipe and Joints. Joining methods for stainless steel pipe and fittings shall be installed in accordance with the manufacturer’s installation instructions and shall comply with Section 1211.15.1 or Section 1211.15.2. 1211.15.1 Mechanical Joints. Mechanical joints shall be designed for their intended use. Such joints shall include compression, flanged, grooved, press-connect, and threaded.

1211.15.2 Welded Joints. Welded joints shall be either fusion or resistance welded based on the selection of the base metal. The chemical composition of the filler metal shall comply with AWS A5.9 based on the alloy content of the piping material.

1211.16 Joints Between Various Materials. Joints

between various materials shall be installed in accordance
CRC § 904.7 High relevance — show source text
Foam systems 904.7 Glazing 2406, 2408.2.1 Halon systems 904.9 Personnel and material hoists 3004.4

Roof tile 1504.3.1

Seismic 1704.2

Smoke control 909.3, 909.5.2, 909.10.2, 909.12.1, 909.13.3, 909.18, 909.20.7.3, 909.21.7, 1705.19 Soils1 803

Sound transmission 1208 Sprinkler protection 903.5 Structural (see Special Inspections and Tests) Wet chemical systems 904.5 Testing Agency (definition) 202 Theaters [see Assembly Occupancy (Group A), Projection Rooms and Stages and Platforms] Thermal Barrier, Foam Plastic Insulation 2603.4, 2603.5.2 Thermal-insulating Materials (See Insulation) 712 Tile 202 Ceramic (see Ceramic Tile) Fire resistance, clay or shale 721.1 Tires, Bulk Storage of 311.2 Toddler 202 Toilets and Toilet Rooms Chapters 11A and 11B, 3305 Accessible 1127A, 1134A, 11B-213,

1607.9.2

Construction/finish materials 1210 Door locking 11B-404, Chapter 29 Family or assisted-use Chapters 11B and 29 Adult changing tables 11B-249 Fixture count Chapter 29 Grab bar live loads 1607.9.2 Location Chapter 29 Partitions 1210.3

Privacy 1210.3 Public facilities Chapter 29 Signs Chapters 11A and 11B, 1143A Single user Chapter 29 Ventilation 1202.5.2.1

Tornado 1603.1.4, 1609.5, 1609.6.3,

1609.6.3.2 Tornado Shelter (see Storm Shelter)

Towers Airport traffic control 412.2 Cooling 1511.4 Location and access 3108.2

Radio 3108

Television 3108

Townhouses 101.2, 202

Toxic Materials [see High-hazard Occupancy (Group H)] Classification 307.6, 414, 415 Gas detection system 415.11.7, 421.5, 908.3

Transient 310.2, 310.4 Transient Lodging (definition) 202 Transportation 11B-810 Travel Distance Area of refuge 1009.6.1 Assembly seating 1030.7 Atrium 404.9 Balcony, exterior 1017.2.1 Care suites (Group I-2) 407.4.2, 407.4.4 Common path of travel 1006.2.1 Drinking fountains Chapter 29 Exit access 1017.2

Mall 402.8.5, 402.8.6
CRC § 605.6.2 High relevance — show source text
605.6.2 Mechanical Joints. Mechanical joints between PE pipe or tubing and fittings shall include insert and mechanical compression fittings that provide a pressure seal resistance to pullout. Joints for insert fittings shall be made by cutting the pipe square, using a cutter designed for plastic piping, and removal of sharp edges. Two stainless steel clamps shall be placed over the end of the pipe. Fittings shall be checked for proper size based on the diameter of the pipe. The end of pipe shall be placed over the barbed insert fitting, making contact with the fitting shoulder. Clamps shall be positioned equal to 180 degrees (3.14 rad) apart and shall be tightened to provide a leak tight joint. Compression type couplings and fittings shall be permitted for use in joining PE piping and tubing. Stiffeners that extend beyond the

clamp or nut shall be prohibited. Bends shall be not less than 30 pipe diameters, or the coil radius where bending with the coil. Bends shall not be permitted closer than 10 pipe diameters of a fitting or valve. Mechanical joints shall be designed for their intended use. 605.7 PE-AL-PE Plastic Pipe/Tubing and Joints. PEAL-PE plastic pipe or tubing and fitting joining methods shall be installed in accordance with the manufacturer’s installation instructions and shall comply with Section 605.7.1 and Section 605.7.1.1.

605.7.1 Mechanical Joints. Mechanical joints for PEAL-PE pipe or tubing and fittings shall be either of the metal insert fittings with a split ring and compression nut or metal insert fittings with copper crimp rings. Metal insert fittings shall comply with ASTM F1974. Crimp insert fittings shall be joined to the pipe by placing the copper crimp ring around the outer circumference of the pipe, forcing the pipe material into the space formed by the ribs on the fitting until the pipe contacts the shoulder of the fitting. The crimp ring shall then be positioned on the pipe so the edge of the crimp ring is [1] ⁄ 8 of an inch (3.2 mm) to [1] ⁄ 4 of an inch (6.4 mm) from the end of the pipe. The jaws of the crimping tool shall be centered over the crimp ring and tool perpendicular to the barb. The jaws shall be closed around the crimp ring and shall not be crimped more than once. 605.7.1.1 Compression Joints. Compression joints for PE-AL-PE pipe or tubing and fittings shall be joined through the compression of a split ring, by a compression nut around the circumference of the pipe. The compression nut and split ring shall be placed around the pipe. The ribbed end of the fitting shall be inserted into the pipe until the pipe contacts the shoulder of the fitting. Position and compress the split ring by tightening the compression nut onto the insert fitting. 605.8 PE-RT. Polyethylene of raised temperature (PE-RT) tubing and fitting joining methods and shall comply with Section 605.8.1.

605.8.1 Mechanical Joints. Fittings for PE-RT tubing shall comply with the applicable standards listed in Table 604.1. Mechanical joints for PE-RT tubing shall be installed in accordance with the manufacturer’s instal lation instructions.
CRC § 803.13 High relevance — show source text
Interior finishes Table 803.13, 804 Live load Table 1607.1 Means of egress Corridors 1020.3

Stairway, exit access 1019

Travel distance 407, 1006.3, 1017.2,

1006.2.1

Mixed occupancies 508.3, 508.4 Occupancy exceptions 303.1.1, 303.1.2, 308.5.1, 308.5.4, 310.4.1 Plumbing fixtures Chapter 29 Risk category Table 1604.5 Standby, emergency power 2702.2 Insulation

Concealed 720.2

Duct insulation 720.1

Exposed 720.3 Fiberboard 720.1, Table 1508.2, 2303.1.6.2, 2303.1.6.3 Foam plastic (see Foam Plastics) 720.1

Loose fill 720.4, 720.6 Pipe insulation 720.1, 720.7 Reflective plastic core 2614 Roof 720.5, 1508 Sound 720, 807, 1206 Thermal 720, 807, 1508 Interior Environment Lighting 1204 Rodentproofing Appendix F Sound transmission 1206

Space dimensions 1208 Temperature control 1203 Ventilation 409.3, 414.3, 415.9.1.7,

1202.5

Yards or courts 1205.2, 1205.3 Interior Finishes Chapter 8 Acoustical ceiling systems 807, 808 Application 803.13, 804.4 Atriums 404.8 Children’s play structures 424 Covered and open mall buildings 402.6

Decorative materials 419, 802.3, 806 Floor finish 804, 805 Foam plastic insulation 2603.3, 2603.4 Foam plastic trim 806.6.1, 2604.2 Insulation 807 Light-transmitting plastics 2606 Signs 402.6.4, 2611 Site-fabricated stretch systems 803.10 Trim 806.6, 806.7 Wall and ceiling finishes 803 Wet location 1210 Intermodal Shipping Container 3114 Interpretation, Code 104.1

Jails [see Institutional (see Group I-3)] 308.5, 408 Joint Gypsum board 2508.5 Lumber sheathing 2308.11.10 Waterproofing 1805.3.3 Joints, Fire-resistant Systems 715 Special inspection 1705.18

Kiosks 402.6.2

Kitchens 303.3, 306.2 Accessibility 1133A, 11B-212 Dimensions 1209 Means of egress 1016.2 Occupant load Table 1004.5 Sinks Chapter 29

INDEX-12 2025 CALIFORNIA BUILDING CODE

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

INDEX

Marquees 3106, H113 Construction 3106.5
CRC § 313.0 High relevance — show source text
313.0 Hangers, Supports, and Anchors. 313.1 General. Piping, tubing, fixtures, appliances, and appurtenances shall be supported in accordance with this code, the manufacturer’s installation instructions, and in accordance with the Authority Having Jurisdiction. Seismic restraints shall be in accordance with the building code. 313.2 Material. Hangers, supports, and anchors shall be of sufficient strength to support the weight of the pipe or tubing and its contents. Piping or tubing shall be isolated from incompatible materials. 313.3 Suspended Piping. Suspended piping shall be supported at intervals not to exceed those shown in Table 313.3. 313.4 Alignment. Piping shall be supported in such a manner as to maintain its alignment and prevent sagging. 313.5 Underground Installation. Piping in the ground shall be laid on a firm bed for its entire length; where other support is otherwise provided, it shall be approved in accordance with Section 301.2.

313.6 Hanger Rod Sizes. Hanger rod sizes shall be not smaller than those shown in Table 313.6.

TABLE 313.6

HANGER ROD SIZES

PIPE AND TUBE SIZE
(inches) ROD SIZE
(inches)

1⁄2 – 4 3⁄8

5 – 8 1⁄2

10 – 12 5⁄8

For SI units: 1 inch = 25.4 mm

313.7 Gas Piping. Gas piping shall be supported by metal straps or hooks at intervals not to exceed those shown in Table 1210.3.5.1.

313.8 [OSHPD 1, 2, 3, 4 & 5] Refer to Title 24, Part 2 of the California Building Code for seismic anchorage and bracing requirements and accommodations for building displace-

ments.

314.0 Trenching, Excavation, and Backfill.

314.1 Trenches. Trenches deeper than the footing of a building or structure, and paralleling the same, shall be located not less than 45 degrees (0.79 rad) from the bottom exterior edge of the footing, or as approved in accordance with Section 301.0.

314.2 Tunneling and Driving. Tunneling and driving shall be permitted to be done in yards, courts, or driveways of a building site. Where sufficient depth is available to permit, tunnels shall be permitted to be used between open-cut trenches.

Tunnels shall have a clear height of 2 feet (610 mm) above the pipe and shall be limited in length to one-half the depth of the trench, with a maximum length of 8 feet (2438 mm). Where pipes are driven, the drive pipe shall be not less than one size larger than the pipe to be laid.

314.3 Open Trenches. Excavations required to be made for the installation of a building drainage system or part thereof, within the walls of a building, shall be open trench work and shall be kept open until the piping has been inspected, tested, and accepted.
CRC § 0.293 High relevance — show source text
For SI units: 1000 British thermal units per hour = 0.293 kW

E 403.3 Size. The size of each section of a gas piping system shall be determined in accordance with NFPA 54/ANSI Z223.1 or by other standard engineering methods acceptable to the Authority Having Jurisdiction. [NFPA 501A:4.3.5.1]

E 403.4 Pressure. Where all connected appliances are operated at their rated capacity, the gas supply pressure shall be not less than 7 inches water column (1.7 kPa). The gas supply pressure shall not exceed 14 inches water column (3.5 kPa). [NFPA 501A:4.3.5.2] E 403.5 Metal Gas Piping. Metal gas pipe shall be standard-weight wrought iron or steel (galvanized or black), yellow brass containing not more than 75 percent copper, or internally tinned or treated copper of iron pipe size. Galvanizing shall not be considered protection against corrosion.

Seamless copper or steel tubing shall be permitted to be used with gases not corrosive to such material. Steel tubing shall comply with ASTM A254. Copper tubing shall comply with ASTM B88 (Type K or Type L) or ASTM B280. Copper tubing (unless tin-lined) shall not be used if the gas contains more than an average of 0.3 grains of hydrogen sulfide per 100 standard cubic feet (scf) of gas (0.7 mg/100 L).

[NFPA 501A:4.3.6.1.1 – 4.3.6.1.6]

E 403.6 Protection Coatings for Metal Gas Piping. All buried or submerged metallic gas piping shall be protected from corrosion by approved coatings or wrapping materials. All gas pipe protective coatings shall be approved types, shall be machine applied, and shall conform to recognized standards. Field wrapping shall provide equivalent protection and is restricted to those short sections and fittings that are necessarily stripped for threading or welding. Risers shall be coated or wrapped to a point at least 6 inches (152 mm) above ground. [NFPA 501A:4.3.6.2.1 – 4.3.6.2.4]

E 403.7 Plastic Piping. Plastic piping shall only be used underground and shall meet the requirements of ASTM D2513 or ASTM D2517, as well as the design pressure and design limitations of 49 CFR 192.123, and shall otherwise conform to the installation requirements thereof. {NFPA 501A:4.3.6.3} E 403.8 Gas Piping Installation. All gas piping installed below ground level shall have a minimum earth cover of 18 inches (457 mm) and shall be installed with at least 12 inches (305 mm) of clearance in any direction from any other underground utility system. [NFPA 501A:4.3.7.1] E 403.8.1 Metallic Gas Piping. All metallic gas piping systems shall be installed in accordance with approved plans and specifications, including provisions for cathodic protection. Each cathodic protection system shall be designed and installed to conform to the provisions of 49 CFR 192. [NFPA 501A:4.3.7.2.1, 4.3.7.2.2]
CRC § 6.32. High relevance — show source text
** Stainless steel joints shall be welded, assembled with approved tubing fittings, brazed with a material having a melting point in excess of 1000°F (538°C), or assembled with press-connect fittings listed to CSA/ANSI LC 4/CSA 6.32. Brazing alloys and fluxes shall be recommended by the manufacturer for use on stainless steel alloys. [NFPA 54:5.5.7.3] 1308.4.7.4 Flared Joints. Flared joints shall be used only in systems constructed from nonferrous pipe and tubing where experience or tests have demonstrated that the joint is suitable for the conditions and where provisions are made in the design to prevent separation of the joints. [NFPA 54:5.5.7.4] 1308.4.7.5 Metallic Pipe Fittings. Metallic fittings shall comply with the following:

(1) Threaded fittings in sizes exceeding 4 inches (100 mm) shall not be used. (2) Fittings used with steel, stainless steel, or wrought-iron pipe shall be steel, stainless steel, copper alloy, malleable iron, or castiron. (3) Fittings used with copper or copper alloy pipe shall be copper or copper alloy. (4) Fittings used with aluminum alloy pipe shall be aluminum alloy. (5) Cast-iron fittings shall comply with the following: (a) Flanges shall be permitted.

(b) Bushings shall not be used.

(c) Fittings shall not be used in systems containing flammable gas-air mixtures.

(d) Fittings in sizes 4 inches (100 mm) and larger shall not be used indoors unless

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1308.4.8.3 Compression-Type Mechanical Joints. Where compression-type mechanical joints are used, the gasket material in the fitting shall be compatible with the plastic piping and with the gas distributed by the system. An internal tubular rigid stiffener shall be used in conjunction with the fitting. The stiffener shall be flush with the end of the pipe or tubing and shall extend at least to the outside end of the compression fitting when installed. The stiffener shall be free of rough or sharp edges and shall not be a force fit in the plastic. Split tubular stiffeners shall not be used. [NFPA 54:5.5.8(3)] 1308.4.8.4 Liquefied Petroleum Gas Piping Systems. Plastic piping joints and fittings for use in LP-Gas piping systems shall be in accordance with NFPA 58. [NFPA 54:5.5.8(4)] 1308.4.9 Flange Specifications. Cast iron flanges shall be in accordance with ASME B16.1. [NFPA 54:5.5.9.1.1] 1308.4.9.1 Steel Flanges. Steel flanges shall be in accordance with the following:

(1) ASME B16.5 or
CRC § 5.3.2.3 High relevance — show source text
The total connected hourly load shall be used as the basis for piping sizing, assuming all appliances are operating at full capacity simultaneously. Exception: Sizing shall be permitted to be based upon established load diversity factors. [NFPA 54:5.3.2.3] 1308.3.2 Sizing Methods. Gas piping shall be sized in accordance with one of the following: (1) Pipe sizing tables or sizing equations in this chapter.

(2) Sizing tables included in a listed piping system manufacturer’s installation instructions.

(3) Engineering methods. [NFPA 54:5.3.3] 1308.3.3 Allowable Pressure Drop. The design pressure loss in a piping system from the point of delivery to the inlet connection of all appliances served shall be such that the supply pressure at each appliance inlet is greater than or equal to the minimum pressure required by the appliance. [NFPA 54:5.3.4] 1308.4 Acceptable Piping Materials and Joining Methods. Materials used for piping systems shall comply with the requirements of Section 1308.4.1 through Section 1308.4.4.2.3. {NFPA 54:5.5.1.1} 1308.4.1 Used Materials. Pipe, fittings, valves, or other materials shall not be used again unless they are free of foreign materials and have been ascertained to be adequate for the service intended. [NFPA 54:5.5.1.2] 1308.4.2 Metallic Pipe. Metallic pipe shall be in accordance with Section 1308.4.2.1 through Section 1308.4.2.4.

1308.4.2.1 Cast Iron. Cast-iron pipe shall not be used. [NFPA 54:5.5.2.1] 1308.4.2.2 Steel, Stainless Steel, and Wrought-Iron. Steel, stainless steel, and wroughtiron pipe shall be at least Schedule 40 and shall comply with the dimensional standards of ASME B36.10M and one of the following: (1) ASTM A53 (2) ASTM A106 (3) ASTM A312 {NFPA 54:5.5.2.2}

TABLE 1308.3.1

APPROXIMATE GAS INPUT FOR TYPICAL APPLIANCES

[NFPA 54: TABLE A.5.3.2.1]

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1308.4.3 Metallic Tubing. Tubing shall not be used with gases corrosive to the tubing material. [NFPA 54:5.5.3.1] 1308.4.3.1 Steel Tubing. Steel tubing shall comply with ASTM A254. [NFPA 54:5.5.3.2] **1308.4.3.2 Stainless Steel Tubing.
CRC § 7.1.6.1 High relevance — show source text
be designed for the same pressure as the pipe. The conduit shall extend at least 4 inches (102 mm) outside the building, be vented outdoors above finished ground level, and be installed so as to prevent the entrance of water and insects. [NFPA 54:7.1.6.1]

1310.1.6.2 Conduit with Both Ends Terminat- ing Indoors. Where the conduit originates and terminates within the same building, the conduit shall originate and terminate in an accessible portion of the building and shall not be sealed. [NFPA 54:7.1.6.2]

1310.1.7 Connections of Plastic Piping. Plastic piping shall be installed outdoors, underground only.

Exceptions:

(1) Plastic piping shall be permitted to terminate aboveground where an anodeless riser is used.

(2) Plastic piping shall be permitted to terminate with a wall head adapter aboveground in buildings, including basements, where the plastic piping is inserted in a piping material permitted for use in buildings.

[NFPA 54:7.1.7.1]

1310.1.7.1 Connections Between Metallic and Plastic Piping. Connections made between metallic and plastic piping shall be made with fittings conforming to one of the following:

(1) ASTM D2513 Category I transition fittings

(2) ASTM F1973

(3) ASTM F2509 [NFPA 54:7.1.7.2]

1310.1.7.2 Tracer Wire. An electrically continuous corrosion-resistant tracer shall be buried with the

plastic pipe to facilitate locating. The tracer shall be one of the following:

(1) A product specifically designed for that pur pose.

(2) Insulated copper conductor not less than 14 AWG.

Where tracer wire is used, access shall be provided from aboveground or one end of the tracer wire or tape shall be brought aboveground at a building wall or riser. [NFPA 54:7.1.7.3 – 7.1.7.3.2]

1310.2 CSST Piping Systems. CSST piping systems shall be installed in accordance with this code and the manufac turer’s installation instructions. [NFPA 54:7.1.8]

1310.3 Installation of Aboveground Piping. Piping installed aboveground shall comply with all of the following:

(1) Piping shall be securely supported and located where it will be protected from physical damage.

(2) Where passing through an exterior wall, the piping shall also be protected from corrosion by coating or wrapping with an inert material approved for such applications.

(3) The piping shall be sealed around its circumference at the point of the exterior penetration to prevent the entry of water, insects, and rodents.

284 2025 CALIFORNIA MECHANICAL CODE

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(4) Where piping is encased in a protective pipe sleeve, the annular spaces between the gas piping and the sleeve and between the sleeve and the wall opening shall be sealed.

(5) Piping installed outdoors shall be elevated not less than 3½ inches (89 mm) above the ground.

(6) Sealing materials shall be compatible with the piping and sleeve. [NFPA 54:7.2.1]
CRC § 6-1 Medium relevance — show source text
000|6-1|6-9|5-2|5-4|4-9|3-11|3-9|3-0|2-11| |8|1-#5|60,000|7-4|8-1|6-3|6-5|5-9|4-9|4-6|3-7|3-7| |8|2-#4
1-#6|40,000|6-10|7-6|5-9|6-0|5-5|4-5|4-2|3-4|3-4| |8|2-#4
1-#6|60,000|8-2|9-1|6-11|7-2|6-6|5-4|5-0|4-1|4-0| |8|2-#5|40,000|8-4|9-3|7-1|7-4|6-7|5-5|5-1|4-1|4-0| |8|2-#5|60,000|9-11|11-0|8-5|8-9|7-10|6-6|6-1|4-8|4-6| |8|2-#6|40,000|9-9|10-10|8-3|8-7|7-9|6-4|5-10|4-1|4-0| |8|2-#6|60,000|DR|DR|DR|DR|DR|DR|DR|DR|DR| |8|Center distance_A_k, l|Center distance_A_k, l|2-6|3-1|1-10|1-11|1-7|1-1|0-11|0-7|0-7| |12|Span without stirrupsi, j|Span without stirrupsi, j|5-5|6-7|4-7|4-10|4-3|3-5|3-3|2-8|2-8| |12|1-#4|40,000|5-3|6-0|4-8|4-10|4-4|3-7|3-4|2-9|2-8| |12|1-#4|60,000|6-5|7-4|5-8|5-10|5-3|4-4|4-1|3-4|3-3| |12|1-#5|40,000|6-6|7-6|5-9|6-0|5-5|4-5|4-2|3-5|3-4| |12|1-#5|60,000|7-11|9-1|7-0|7-3|6-7|5-5|5-1|4-2|4-0| |12|2-#4
1-#6|40,000|7-4|8-5|6-6|6-9|6-1|5-0|4-9|3-10|3-9| |12|2-#4
1-#6|60,000|10-3|11-9|9-1|9-5|8-6|7-0|6-7|5-4|5-3| |12|2-#5|40,
CRC § 8-7 Medium relevance — show source text
j|8-7|11-4|8-1|8-5|7-5|6-1|5-9|4-10|4-9| |20|1-#4|40,000|6-5|7-10|6-2|6-4|5-9|4-9|4-6|3-8|3-7| |20|1-#4|60,000|7-10|9-7|7-6|7-9|7-0|5-10|5-6|4-5|4-4| |20|1-#5|40,000|8-0|9-9|7-8|7-11|7-2|5-11|5-7|4-6|4-5| |20|1-#5|60,000|9-9|11-11|9-4|9-8|8-9|7-3|6-10|5-6|5-5| |20|2-#4
1-#6|40,000|9-0|11-1|8-8|8-11|8-1|6-9|6-4|5-2|5-0| |20|2-#4
1-#6|60,000|11-0|13-6|10-6|10-11|9-10|8-2|7-9|6-3|6-2| |20|2-#5|40,000|11-3|13-9|10-9|11-1|10-0|8-4|7-10|6-5|6-3| |20|2-#5|60,000|15-8|19-2|15-0|15-6|14-0|11-8|11-0|8-11|8-9| |20|2-#6|40,000|15-5|18-10|14-8|15-2|13-9|11-5|10-9|8-6|8-3| |20|2-#6|60,000|18-7|22-9|17-9|18-5|16-7|13-10|12-9|9-5|9-2| |20|Center distance_A_k, l|Center distance_A_k, l|5-7|8-4|5-1|5-5|4-5|3-1|2-9|1-10|1-9| |24|Span without stirrupsi, j|Span without stirrupsi, j|9-11|13-7|9-9|10-2|9-0|7-5|7-0|5-10|5-9| |24|1-#5|40,000|8-6|10-8|8-5|8-8|7-10|6-6|6-2|5-0|4-11| |24|1-#5|60,000|10-5|13-0|10-3|10-7|9-7|8-0|7-6|6-1|6-0| |24|2-#4
1-#6|40,
CRC § 6-2 Medium relevance — show source text
000|6-2|6-9|5-2|5-4|4-9|4-1|3-10|3-2|3-1| |8|1-#5|60,000|7-5|8-1|6-2|6-5|5-9|4-11|4-7|3-9|3-8| |8|2-#4
1-#6|40,000|6-11|7-6|5-9|6-0|5-4|4-7|4-4|3-6|3-5| |8|2-#4
1-#6|60,000|8-3|9-0|6-11|7-2|6-5|5-6|5-2|4-2|4-1| |8|2-#5|40,000|8-5|9-2|7-0|7-3|6-6|5-7|5-3|4-2|4-0| |8|2-#5|60,000|DR|DR|DR|DR|DR|DR|DR|DR|DR| |8|Center distance_A_k, l|Center distance_A_k, l|2-1|2-6|1-5|1-6|1-3|0-11|0-10|0-6|0-6| |12|Span without stirrupsi, j|Span without stirrupsi, j|4-10|5-8|4-0|4-2|3-9|3-2|3-0|2-7|2-6| |12|1-#4|40,000|5-5|6-1|4-8|4-10|4-4|3-9|3-6|2-10|2-10| |12|1-#4|60,000|6-7|7-5|5-8|5-11|5-4|4-7|4-3|3-6|3-5| |12|1-#5|40,000|6-9|7-7|5-9|6-0|5-5|4-8|4-4|3-7|3-6| |12|1-#5|60,000|9-4|10-6|8-1|8-4|7-6|6-6|6-1|5-0|4-10| |12|2-#4
1-#6|40,000|8-8|9-9|7-6|7-9|7-0|6-0|5-8|4-7|4-6| |12|2-#4
1-#6|60,000|10-6|11-9|9-1|9-5|8-5|7-3|6-10|5-7|5-5| |12|2-#5|40,000|10-8|12-0|9-3|9-7|8-7|7-5|6-11|5-6|5-4| |12|2-#5|60,000|12-10|14-5|11-1|11-6|10-4|8-11|8-4|6-7|6-4| |12|2-#6|40,
CRC § 12-7 Medium relevance — show source text
000|12-7|14-5|11-2|11-6|10-5|8-7|8-1|6-6|6-4| |12|2-#6|40,000|12-4|14-2|10-11|11-4|10-2|8-5|7-8|5-7|5-5| |12|2-#6|60,000|14-9|17-0|13-1|13-6|12-2|10-0|9-1|6-6|6-4| |12|Center distance_A_k, l|Center distance_A_k, l|3-9|4-11|2-11|3-2|2-7|1-9|1-7|1-0|1-0| |16|Span without stirrupsi, j|Span without stirrupsi, j|7-1|9-0|6-4|6-8|5-10|4-9|4-6|3-9|3-8| |16|1-#4|40,000|5-11|7-0|5-5|5-8|5-1|4-3|4-0|3-3|3-2| |16|1-#4|60,000|7-3|8-7|6-8|6-11|6-3|5-2|4-10|3-11|3-10| |16|1-#5|40,000|7-4|8-9|6-9|7-0|6-4|5-3|4-11|4-0|3-11| |16|1-#5|60,000|9-0|10-8|8-3|8-7|7-9|6-5|6-0|4-11|4-9| |16|2-#4
1-#6|40,000|8-4|9-11|7-8|7-11|7-2|5-11|5-7|4-6|4-5| |16|2-#4
1-#6|60,000|10-2|12-0|9-4|9-8|8-9|7-3|6-10|5-6|5-5| |16|2-#5|40,000|10-4|12-3|9-6|9-10|8-11|7-4|6-11|5-8|5-6| |16|2-#5|60,000|14-4|17-1|13-3|13-8|12-4|10-3|9-8|7-10|7-8| |16|2-#6|40,000|14-1|16-9|13-0|13-5|12-2|10-1|9-6|7-0|6-10| |16|2-#6|60,000|17-0|20-2|15-8|16-2|14-7|12-0|10-11|8-0|7-9| |16|Center distance_A_k, l|Center distance_A_k, l|4-9|6-8|4-0|4-4|3-6|2-5|2-2|1-5|1-4|
CRC § 8-0 Medium relevance — show source text
000|8-0|8-10|6-9|7-0|6-3|5-11|5-5|4-7|4-5| |16i|1-#5|40,000|8-2|9-0|6-11|7-2|6-5|6-0|5-7|4-8|4-6| |16i|1-#5|60,000|11-5|12-6|9-3|9-9|8-4|7-7|6-10|5-6|5-4| |16i|2-#4
1-#6|40,000|10-7|11-7|8-11|9-3|8-3|7-7|6-10|5-6|5-4| |16i|2-#4
1-#6|60,000|12-2|14-0|9-3|9-9|8-4|7-7|6-10|5-6|5-4| |16i|2-#5|40,000|12-2|14-2|9-3|9-9|8-4|7-7|6-10|5-6|5-4| |16i|2-#5|60,000|DR|DR|DR|DR|DR|DR|DR|DR|DR| |16i|Center distance_A_m, n|Center distance_A_m, n|1-8|2-0|1-2|1-3|1-0|0-11|0-9|STL|STL| |20i|Span without stirrupsk, l|Span without stirrupsk, l|5-0|5-6|4-6|4-7|4-3|4-1|4-0|3-8|3-8| |20i|1-#4|40,000|7-2|8-2|6-3|6-6|5-10|5-6|5-1|4-3|4-2| |20i|1-#4|60,000|8-11|9-11|7-8|7-11|7-1|6-8|6-2|5-2|5-0| |20i|1-#5|40,000|9-1|10-2|7-9|8-1|7-3|6-10|6-4|5-4|5-2| |20i|1-#5|60,000|12-8|14-2|10-11|11-3|10-2|9-6|8-9|7-1|6-10| |20i|2-#4
1-#6|40,000|10-3|11-5|8-9|9-1|8-2|7-8|7-1|6-0|5-10| |20i|2-#4
1-#6|60,000|14-3|15-11|11-9|12-5|10-8|9-9|8-9|7-1|6-10| |20i|2-#5|40,000|14-6|16-3|11-6|12-1|10-4|9-6|8-6|6-11|6-8| |20i|2-#5|60,
CRC § 12-0 Medium relevance — show source text
000|DR|DR|12-0|15-3|10-11|15-0|10-2|14-8| |8|2-#4
1-#6|60,000|DR|DR|DR|DR|12-2|15-3|11-7|15-3| |8|2-#5|40,000|DR|DR|DR|DR|12-7|16-7|11-9|16-7| |8|2-#5|60,000|DR|DR|DR|DR|DR|DR|13-3|16-7| |8|2-#6|40,000|DR|DR|DR|DR|DR|DR|13-2|17-8| |8|2-#6|60,000|DR|DR|DR|DR|DR|DR|DR|DR| |12|1-#4|40,000|11-5|9-10|10-6|12-0|9-6|11-6|8-9|11-1| |12|1-#4|60,000|11-5|9-10|11-8|13-3|10-11|14-0|10-1|13-6| |12|1-#5|40,000|11-5|9-10|11-8|13-3|11-1|14-4|10-3|13-9| |12|1-#5|60,000|11-5|9-10|11-8|13-3|11-10|16-0|11-9|16-9| |12|2-#4
1-#6|40,000|DR|DR|11-8|13-3|11-10|16-0|11-2|15-6| |12|2-#4
1-#6|60,000|DR|DR|11-8|13-3|11-10|16-0|11-11|18-4| |12|2-#5|40,000|DR|DR|11-8|13-3|11-10|16-0|11-11|18-4| |12|2-#5|60,000|DR|DR|11-8|13-3|11-10|16-0|11-11|18-4| |16|1-#4|40,000|13-6|13-0|11-10|13-8|10-7|12-11|9-11|12-4| |16|1-#4|60,000|13-6|13-0|13-8|16-7|12-4|15-9|11-5|15-0| |16|1-#5|40,000|13-6|13-0|13-10|17-0|12-6|16-1|11-7|15-4| |16|1-#5|60,000|13-6|13-0|13-10|17-1|14-0|19-7|13-4|18-8| |16|2-#4
1-#6|40,000|13-6|13-0|13-10|17-1|13-8|18-2|12-8|17-4| |16|2-#4
1-#6|60,
CRC § 10-13 Medium relevance — show source text
R1006.5 Outlet. The exterior air outlet shall be located in the back or side of the firebox chamber or shall be located outside of the firebox, at the level of the hearth and not greater than 24 inches (610 mm) from the firebox opening. The outlet shall be closable and designed to prevent burning material from dropping into concealed combustible spaces.

2025 CALIFORNIA RESIDENTIAL CODE 10-13

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

10-14 2025 CALIFORNIA RESIDENTIAL CODE

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

Part IV—Energy Conservation

(Note: Part IV is not adopted. See California Energy Code, Title 24, Part 6.)

2025 CALIFORNIA RESIDENTIAL CODE 11-1

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11-2 2025 CALIFORNIA RESIDENTIAL CODE

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

Part V—Mechanical

(Note: Part V is not adopted. See California Mechanical Code, Title 24, Part 4.)

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12-2 2025 CALIFORNIA RESIDENTIAL CODE

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Part VI—Fuel Gas

(Note: Part VI is not adopted. See California Mechanical Code and California Plumbing Code, Title 24, Parts 4 and 5.)

2025 CALIFORNIA RESIDENTIAL CODE 24-1

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

24-2 2025 CALIFORNIA RESIDENTIAL CODE

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Part VII—Plumbing

(Note: Part VII is not adopted. See California Plumbing Code, Title 24, Part 5.)

2025 CALIFORNIA RESIDENTIAL CODE 25-1

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

25-2 2025 CALIFORNIA RESIDENTIAL CODE

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

Part VIII—Electrical

(Note: Part VIII is not adopted. See California Electrical Code, Title 24, Part 3.)

2025 CALIFORNIA RESIDENTIAL CODE 34-1

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34-2 2025 CALIFORNIA RESIDENTIAL CODE

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CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE

CHAPTER 44 – REFERENCED STANDARDS

(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

|Adopting

NPS	SIZE OF CLEANOUT (inches)	THREADS PER INCH
1.5	1.5	11.5
2	1.5	11.5
2.5	2.5	8
3	2.5	8
4 & larger	3.5	8

PIPE AND TUBE SIZE (inches)	ROD SIZE (inches)
1⁄2 – 4	3⁄8
5 – 8	1⁄2
10 – 12	5⁄8

CRC § 1974-17 Medium relevance — show source text

Adopting agency	BSC	BSC- CG	SFM	HCD	Col6	Col7	DSA	Col9	Col10	OSHPD	Col12	Col13	Col14	Col15	Col16	BSCC	DPH	AGR	DWR	CEC	CA	SL	SLC
Adopting agency	BSC	BSC- CG	SFM	1	2	1/AC	AC	SS	SS/CC	1	1R	2	3	4	5	5	5	5	5	5	5	5	5
Adopt entire chapter
Adopt entire chapter as amended (amended sections listed below)			X	X
Adopt only those sections that are listed below
Chapter / Section
AAMA				X
ACCA				X
ANSI			X	X
ASME				X
ASTM			X	X
ASTM E108-2020a			X
CSA				X
DASMA				X
ICC			X	X
IFC-18				X
ISO				X
NFPA			X	X
NFPA 68-13			X
SFM			X
UBC			X
UL				X
UL 790 Edition 9 2022			X
UL 1974-17			X
UL 9540-20			X
UL 9540 Edition 4 2019			X
WDMA				X

The state agency does not adopt sections identified with the following symbol: †

2025 CALIFORNIA RESIDENTIAL CODE 44-1

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44-2 2025 CALIFORNIA RESIDENTIAL CODE

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Part IX— Referenced Standards

44 REFERENCED STANDARDS

Notwithstanding California laws and regulations, these referenced standards shall be applicable only to those California Residential Code sections that are adopted.

User notes:

CRC § 0.34 Medium relevance — show source text
32 to 0.34|250|4.5|5.0|5.0|5.0|5.0| |251 to 350|0.29 to 0.32|200|3.0|4.0|4.5|4.5|4.5| |201 to 250|0.27 to 0.30|150|2.5|2.5|2.5|3.0|3.0| |141 to 200|0.25 to 0.29|125|1.5|1.5|2.0|2.0|2.0| |105 to 140|0.22 to 0.28|100|1.0|1.0|1.5|1.5|1.5|

For SI units: °C=(°F-32)/1.8, 1 inch = 25 mm, 1 British thermal unit inch per hour square foot degree Fahrenheit = [0.1 W/(m•K)]

Notes: 1 For insulation outside the stated conductivity range, the minimum thickness ( T ) shall be determined as follows: T = r {(1 + t / r ) [K] [/] [k ] – 1}

Where:

T = minimum insulation thickness (inches). r = actual outside radius of pipe (inches). t = insulation thickness listed in this table for applicable fluid temperature and pipe size. K = conductivity of alternate material at mean rating temperature indicated for the applicable fluid temperature [Btu•in/(h•ft [2] - °F)] [W/(m•K)]. k = the upper value of the conductivity range listed in this table for the applicable fluid temperature. 2 These thicknesses are on energy efficiency considerations only. Additional insulation is sometimes required relative to safety issues/surface temperature. 3 For piping smaller than 1 1 ⁄ 2 inches (40 mm) or less and located in partitions within conditioned spaces, reduction of these thicknesses by 1 inch (25.4 mm) shall be permitted (before thickness adjustment required in footnote 1) but not to thicknesses below 1 inch (25.4 mm). 4 For direct-buried heating and hot water system piping, reduction of these thicknesses by 1 1 ⁄ 2 inch (40 mm) shall be permitted (before thickness adjustment required in footnote 1) but not to thicknesses below 1 inch (25.4 mm). 5 Table E 503.7.3(1) is based on steel pipe. Nonmetallic pipes schedule 80 thickness or less shall use the table values. For other nonmetallic pipes having thermal resistance more than that of steel pipe, reduced insulation thicknesses are permitted where documentation is provided showing that the pipe with the proposed insulation has no more heat transfer per foot (mm) than a steel pipe of the same size with the insulation thickness shown in Table E 503.7.3(1).

474 2025 CALIFORNIA MECHANICAL CODE

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

APPENDIX E

TABLE E 503.7.3(2) MINIMUM PIPE INSULATION THICKNESS FOR COOLING SYSTEMS (CHILLED WATER, BRINE, AND REFRIGERANT) [1,2,3,4 ]

[ASHRAE 90.1: TABLE 6.8.3-2]
CRC § 17.4 Medium relevance — show source text
8|17.4|1.5|2.5|3.4|5.1|0.6|1.0|1.3|1.9| |10|7.7|13.1|17.8|26.3|2.3|3.8|5.2|7.7|0.8|1.4|2.0|2.9| |12|10.8|18.4|24.9|NP|3.2|5.4|7.3|10.7|1.2|2.0|2.7|4.0| |14|14.4|24.5|NP|NP|4.2|7.1|9.6|14.3|1.6|2.7|3.6|5.4| |16|18.4|NP|NP|NP|5.4|9.1|12.4|18.3|2.0|3.4|4.7|6.9| |18|22.9|NP|NP|NP|6.7|11.4|15.4|22.7|2.5|4.3|5.8|8.6| |20|27.8|NP|NP|NP|8.1|13.8|18.7|27.6|3.1|5.2|7.0|10.4| |22|NP|NP|NP|NP|9.7|16.5|22.3|NP|3.7|6.2|8.4|12.4| |24|NP|NP|NP|NP|11.4|19.3|26.2|NP|4.3|7.3|9.9|14.6| |26|NP|NP|NP|NP|13.2|22.4|NP|NP|5.0|8.5|11.4|16.9| |28|NP|NP|NP|NP|15.1|25.7|NP|NP|5.7|9.7|13.1|19.4| |30|NP|NP|NP|NP|17.2|NP|NP|NP|6.5|11.0|14.9|22.0| |32|NP|NP|NP|NP|19.4|NP|NP|NP|7.3|12.4|16.8|24.8| |34|NP|NP|NP|NP|21.7|NP|NP|NP|8.2|13.9|18.8|NP| |36|NP|NP|NP|NP|24.1|NP|NP|NP|9.1|15.4|20.9|NP| |For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 gallon per minute = 0.063 L/s, 1 pound per square inch = 6.895 kPa.
NP = Not Permitted. Pressure loss exceeds reasonable limits.
a. Values are applicable for underground piping materials listed in_ the California Plumbing Code_ and are based on an SDR of 11 and a Hazen Williams C Factor of 150.
b. Values include the following length allowances for fittings: 25-percent length increase for actual lengths up to 100 feet and 15-percent length increase for actual lengths over
100 feet.
c. Flow rate from Section P2904.4.2.

CRC § 3.2.2 Medium relevance — show source text

1810 A .3.2.2 Prestressing steel. Prestressing steel shall conform to ASTM A416.

1810 A .3.2.3 Steel. Structural steel H-piles and structural steel sheet piling shall conform to the material requirements in ASTM A6. Steel pipe piles shall conform to the material requirements in ASTM A252. Fully welded steel piles shall be fabricated from plates that conform to the material requirements in ASTM A36, ASTM A283, ASTM A572, ASTM A588 or ASTM A690.

1810 A .3.2.4 Timber. Not permitted by DSA-SS, DSA-SS/CC or OSHPD.

1810 A .3.2.5 Protection of materials. Where boring records or site conditions indicate possible deleterious action on the materials used in deep foundation elements because of soil constituents, changing water levels or other factors, the elements shall be adequately protected by materials, methods or processes approved by the building official. Protective materials shall be applied to the elements so as not to be rendered ineffective by installation. The effectiveness of such protective measures for the particular purpose shall have been thoroughly established by satisfactory service records or other evidence.

1810 A .3.2.6 Allowable stresses. The allowable stresses for materials used in deep foundation elements shall not exceed those specified in Table 1810 A .3.2.6.

TABLE 1810A.3.2.6—ALLOWABLE STRESSES FOR MATERIALS USED IN DEEP FOUNDATION ELEMENTS	Col2
MATERIAL TYPE AND CONDITION	MAXIMUM ALLOWABLE STRESSa
1. Concrete or grout in compressionb Cast-in-place with a permanent casing in accordance with Section 1810_A_.3.2.7 or Section 1810_A_.3.5.3.4 Cast-in-place in other permanent casing or rock Cast-in-place without a permanent casing Precast nonprestressed Precast prestressed	0.4_f ′c_ 0.33_f ′c_ 0.3_f ′c_ 0.33_f ′c_ 0.33_f ′c_ - 0.27_fpc_
2. Nonprestressed reinforcement in compression	0.4_fy_ ≤ 30,000 psi
3. Steel in compression Cores within concrete-filled pipes or tubes Pipes, tubes or H-piles, where justified in accordance with Section 1810.3.2.8 Pipes or tubes for micropiles Other pipes, tubes or H-piles Helical piles	0.5_Fy_ ≤ 32,000 psi 0.5_Fy ≤ 32,000 psi 0.4_Fy ≤ 32,000 psi 0.35_Fy_ ≤ 24,000 psi 0.6_Fy_ ≤ 0.5_Fu_
4. Nonprestressed reinforcement in tension Within micropiles Other conditions For load combinations that do not include wind or seismic loads For load combinations that include wind or seismic loads	0.6_fy_ 0.5_fy_ ≤ 30,000 psi 0.5_fy_ ≤ 40,000 psi
5.

CRC § 6.6.1.4 Medium relevance — show source text
6.6.1.4 The number of fire appurtenances between sectional control valves is allowed to be modified by the authority having jurisdiction.

Revise Section 10.4.3.1.1 as follows:

10.4.3.1.1 Pipe joints shall not be located under foundation footings. The pipe under the building or building foundation shall not contain mechanical joints.

Exceptions:

1. Where allowed in accordance with 10.4.3.2.

2. Alternate designs may be utilized where designed by a registered professional engineer and approved by the enforcing agency.

Revise Section 10.9.1 as follows:

10.9.1 Backfill shall be well tamped in layers or puddle under and around pipes to prevent settlement or lateral movement. Backfill shall consist of clean fill sand or pea gravel to a minimum 6″ below and to a minimum of 12″ above the pipe and shall contain no ashes, cinders, refuse, organic matter or other corrosive materials. Other backfill materials and methods are permitted where designed by a registered professional engineer and approved by the enforcing agency.

25—13CA: California NFPA 25 Edition (Based on the 2011 Edition) Inspection, Testing and Maintenance of Water-based Fire Protection Systems Chapter 31F, 3108F

30—24: Flammable and Combustible Liquids Code

607.1, 5001.1, 5701.2, 5703.6.2, 5703.6.2.1, 5704.2.7, 5704.2.7.1, 5704.2.7.2, 5704.2.7.3.2, 5704.2.7.4, 5704.2.7.6, 5704.2.7.7, 5704.2.7.8, 5704.2.7.9, 5704.2.9.3, 5704.2.9.4, 5704.2.9.6.1.1, 5704.2.9.6.1.2, 5704.2.9.6.1.3, 5704.2.9.6.1.4, 5704.2.9.6.1.5, 5704.2.9.6.2, 5704.2.9.7.3, 5704.2.10.2, 5704.2.11.3, 5704.2.11.4.2, 5704.2.12.1, 5704.3.1, 5704.3.6, Table 5704.3.6.3(1), Table 5704.3.6.3(2), Table 5704.3.6.3(3), 5704.3.7.2.3, 5704.3.8.4, 5706.8.3

30A—24: Code for Motor Fuel Dispensing Facilities and Repair Garages

2301.4, 2301.5, 2301.6, 2306.6.3, 2310.1
CRC § 1015.5 Medium relevance — show source text
Screen porches 1015.5 Stairs 1015.2

Vehicle barrier 406.4.2, 1607.11 Windows 1015.8

Gutters 1502.3 Gymnasiums 303.4 Group E 303.1.3 Live load Table 1607.1 Occupant load 1004.5 Gypsum Chapter 25 Board Chapter 25 Ceiling diaphragms 2508.6 Concrete, reinforced gypsum 2514 Construction 2508 Draftstopping 718.3.1 Exterior soffit Table 2506.2 Fastening Table 2306.3(3), 2508.1 Fire resistance 719, 722.2.1.4, 722.6.2 Fire-resistant joint treatment 2508.5 Inspection 2503 Lath 2507, 2510 Lathing and furring for cement plaster 719, 2510 Lathing and plastering 2507 Materials 2506

Panel products Chapter 25 Performance 2502 Plaster, exposed aggregate 2513 Plaster, exterior 2512 Plaster, interior 2511 Shear wall construction Table 2306.3(3), 2308.10.3, 2505 Sheathing Table 2308.9.9, Table 2508.1, 2508.2, 2508.5, 2510.5.2.2 Showers and water closets 2509

Stucco 2510

Veneer base 2507.2

Veneer plaster 2507.2, 2511.1, Table 2511.1.1

Vertical and horizontal assemblies

2504

Wallboard Table 2506.2, 2508.2, 2508.2.1, 2508.4, 2510.5.2.1 Water-resistant backing board 2506.2, 2509.2

Habitable Space 1208 Handrails 1014 Alternating tread devices 1011.14 Assembly aisles 1030.16 Construction 1014.5, 1014.6, 1014.7 Extensions 1014.7 Glazing 2407 Graspability 1014.4 Guards 1015.3 Height 1014.2 Loads 1607.9

Location 1014.1, 1014.8, 1014.9,

1014.10

Ramps 1012.8 Stairs 1011.11

Hardboard 1403.3.2, 2303.1.7 Hardware (see Doors and Locks and Latching) Hardwood

Fastening 2304.10 Quality 2303.3 Veneer 1403.3.2 Hazardous Materials 307, 414, 415 Compliance with California Fire Code 307.2

Control areas 414.2

Explosion control 414.5.1, Table 414.5.1, 415.11.6.5, 426.1.4 Mercantile occupancies 309.2 Reporting 414.1.3 Sprinkler protection Table 414.2.5.1, Table 414.2.5.2, 415.4, 415.11.12,

903.2.5
CRC § 1305.2.3.3 Medium relevance — show source text
2, 1305.2.3.3, 1305.2.4.1, 1305.2.5, 1305.2.5.1, 1305.2.6, 1305.2.7.1, 1305.2.8, 1305.2.9, 1305.2.9.1, 1305.2.10, 1305.2.10.1, 1305.2.11, 1305.2.11.1, 1305.2.12.1, 1305.2.13, Table 1305.2.15, 1305.2.15.1, 1305.2.16.1, 1305.2.17, 1305.2.17.1, 1305.2.18, 1305.2.18.1, 1305.2.19, Table 1305.2.19, 1305.2.20, 1305.2.20.1, 1307.1.1, 1401.2, 1402.1, 1402.2, 1402.2.1, 1402.3, 1402.4, 1402.5, 1402.6, 1501.5, 1504.1.1, 1504.1.4.1, 1504.1.7, 1509.1, 1509.3, 1510.1

CEC — 25 : California Energy Code

302.2, 702.7, 708.1, 809.1, 907.1, 1104.1

CFC—25: California Fire Code

101.2.2, 101.4.2, 301.3.1, 302.2, 307.1, 308.1, 802.2.1, 802.2.3, 803.2.3, 803.4.1.1, 803.4.1.2, 803.4.1.3, 803.4.1.4, 803.4.1.5, 803.4.1.6, Table 804.5.1.1(1), 904.1.5, 1011.6.1.1, 1303.1.2, 1305.2.8.1, 1305.2.14, 1305.2.14.1, 1401.2, 1501.1, 1501.5, 1502.1, 1502.1.1, 1502.2, 1502.3, 1504.1, 1507.1, 1507.2

CMC—25: California Mechanical Code

302.2, 702.7, 807.1, 902.1.1, 1008.1, 1305.2.7.1, 1305.2.8, 1305.2.8.1

CPC—25: California Plumbing Code

302.2, 408.1, 702.7, 1009.1, 1009.2, 1009.3, 1009.5, 1302.1.6, 1503.1
CRC § 6-11 Medium relevance — show source text
j|6-11|7-9|6-1|6-3|5-9|5-7|5-3|4-9|4-8| |24|1-#4|40,000|8-0|9-0|6-11|7-2|6-5|6-2|5-8|4-9|4-8| |24|1-#4|60,000|9-9|11-0|8-5|8-9|7-10|7-6|6-11|5-10|5-8| |24|1-#5|40,000|10-0|11-3|8-7|8-11|8-0|7-7|7-0|5-11|5-9| |24|1-#5|60,000|13-11|15-8|12-0|12-5|11-2|10-7|9-10|8-3|8-0| |24|2-#4
1-#6|40,000|12-11|14-6|11-2|11-6|10-5|9-10|9-1|7-8|7-5| |24|2-#4
1-#6|60,000|15-7|17-7|13-6|13-11|12-7|11-11|11-0|9-3|9-0| |24|2-#5|40,000|15-11|17-11|13-7|14-3|12-8|11-9|10-8|8-7|8-4| |24|2-#5|60,000|19-1|21-6|16-5|17-1|15-1|14-0|12-6|9-11|9-7| |24|2-#6|40,000|17-7|21-1|14-1|14-10|12-8|11-9|10-8|8-7|8-4| |24|2-#6|60,000|DR|DR|DR|DR|DR|DR|DR|DR|DR| |24|Center distance_A_k, l|Center distance_A_k, l|3-3|4-1|2-5|2-7|2-1|1-11|1-7|1-2|1-1| |For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square inch = 6.895 kPa, 1 pound per square foot = 0.0479 kPa, Grade 40 = 280 MPa, Grade 60 = 420 MPa.
a. See Table R608.3 for tolerances permitted from nominal thickness.
b. Table values are based on concrete with a minimum specified compressive strength of 2,500 psi. See Note j.
c. Table values are based on uniform loading. See Section R608.8.2 for lintels supporting concentrated loads.
d. Deflection criterion is_L_/240, where_L_ is the clear span of the lintel in inches, or1/2-inch, whichever is less.
e. Linear interpolation is permitted between ground snow loads and between lintel depths.
f. DR indicates design required.
g.

Frequently asked questions

Why don't I find § 1208.5.4 / § 1208.5.5 text in the CRC?

The CRC does not adopt the plumbing and fuel‑gas parts; it defers those topics to the California Plumbing Code and California Mechanical Code. The CRC therefore does not contain operative plumbing/gas material lists at those section numbers.

Can I use PEX for potable water inside the house?

Yes — provided the PEX product and its fittings are listed for potable water and installed per the CPC (see Table 604.1 and the applicable joint/installation sections). Always use the manufacturer's listed fittings and follow the CPC installation provisions.

Is plastic allowed for gas piping inside the building?

No — plastic fuel‑gas piping is generally permitted only underground; exceptions for aboveground termination are narrowly drawn (anodeless risers, wall adapters, or insertion into permitted aboveground piping), and all installations must meet the referenced standards.

Do I need a dielectric union when joining copper to steel?

Yes — dissimilar metal connections often require dielectric fittings or unions per the CPC joint requirements (dielectric unions must meet the listed standards). Check CPC joint sections for the exact requirement.

Can I reuse old pipe I pulled out of another project?

No — the CPC prohibits reuse of piping/tubing previously used for other purposes in potable water systems. Use new, listed materials or materials specifically approved for reuse.

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