Ch. 10 Boilers and Pressure Vessels — 2025 California Mechanical Code
California Mechanical Code (Title 24, Part 4) · 2025 edition · updated 2026-10-19 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
Sections in this part
- 1001.1 Applicability.
- 1001.2 Boiler Rooms and Enclosures.
- 1001.3 Air for Combustion and Ventilation.
- 1001.4 Drainage.
- 1001.5 Mounting.
- 1001.6 Chimneys or Vents.
- 1002.1 General.
- 1002.2 Oil-Burning Boilers.
- 1002.3 Electric Boilers.
- 1002.4 Solid-Fuel-Fired Boilers.
- 1002.5 Dual Purpose Water Heaters.
- 1003.1 Safety Requirements.
- 1003.2 Controls.
- 1003.3 Gauges.
- 1003.4 Stack Dampers.
- 1003.5 Welding.
- 1004.1 General.
- 1004.2 Open-Type Expansion Tanks.
- 1004.3 Closed-Type Systems.
- 1004.4 Minimum Capacity of Closed-Type Tank.
- 1005.1 General.
- 1005.2 Discharge Piping.
- 1005.3 Splash Shield.
- 1005.4 Hazardous Discharge.
- 1005.5 Vacuum Relief Valve.
- 1006.1 General.
- 1007.1 General.
- 1008.1 General.
- 1009.1 General.
- 1010.1 General.
- 1010.2 Power Boilers.
- 1010.3 Steam-Heating Boilers, Hot Water Boilers, and Power Boilers.
- 1010.4 Package Boilers, Steam-Heating Boilers, and Hot-Water-Heating Boilers.
- 1011.1 General.
- 1012.1 General.
- 1013.1 General.
- 1013.2 Operating Permit.
- 1013.3 Maintenance Inspection.
- 1013.4 Power and Miniature Boilers.
- 1013.5 Steam-Heating and Water-Heating Boilers.
- 1013.6 Automatic Steam-Heating Boilers.
- 1013.7 Unfired Pressure Vessels.
- 1014.1 General.
Cite as: 2025 California Mechanical Code (Title 24, Part 4) Chapter 10 · Effective January 1, 2026 · Official source: Building Standards Commission
(Matrix Adoption Tables are non-regulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)
| Adopting Agency | BSC | BSC-CG | SFM | HCD 1 | HCD 2 | HCD 1-AC | DSA AC | DSA SS | DSA SS/CC | OSHPD 1 | OSHPD 1R | OSHPD 2 | OSHPD 3 | OSHPD 4 | OSHPD 5 | OSHPD 6 | BSCC | DPH | AGR | DWR | CEC | CA | SL | SLC |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Adopt Entire Chapter | X | X | X | X | X | X | X | |||||||||||||||||
| Adopt Entire Chapter as amended (amended sections listed below) | X | X | X | X | X | X | ||||||||||||||||||
| Adopt only those sections that are listed below | ||||||||||||||||||||||||
| Chapter/ |
||||||||||||||||||||||||
| 1001.2.1 | X | 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.
CHAPTER 10
BOILERS AND PRESSURE VESSELS
1001.0 General.¶
1002.0 Standards.¶
1003.0 Detailed Requirements.¶
1004.0 Expansion Tanks.¶
1005.0 Safety or Relief Valve Discharge.¶
1006.0 Shutoff Valves.¶
1007.0 Gas-Pressure Regulators.¶
1008.0 Low-Water Cutoff.¶
1009.0 Combustion Regulators – Safety Valves.¶
1010.0 Clearance for Access.¶
1011.0 Boilers, Stokers, and Steam Generators.¶
1012.0 Operating Adjustments and Instructions.¶
1013.0 Inspections and Tests.¶
1014.0 Operation and Maintenance of Boilers and Pressure Vessels.¶
Pressure Vessels.
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