California Code of Regulations|§ 4534 - Plumbing

                                                
  
 
(a) Except as provided in Subsections (b) through (h) the provisions of Article 3, Subarticle 5 of this subchapter, shall apply to plumbing equipment and installations of all special purpose commercial modulars.
 
(b) In pipe joints for gas pipes, right and left nipples or couplings shall not be used. Unions, if used, shall be of ground joint type. The material used for welding or brazing pipe connections shall have a melting temperature in excess of 1,000 degrees Fahrenheit (537.8 degrees Celsius). Pipe shall not be bent.
 
(c) Tubing joints shall be made with either a single or a double flare of the proper degree as recommended by the tubing manufacturer, or with other listed vibration-resistant fittings, or joints may be brazed with material having a melting point exceeding 1,000 degrees Fahrenheit (537.8 degrees Celsius). Metallic ball sleeve compression-type tubing fittings shall not be used.
 
(d) Tubing shall not be run inside walls, floors, ceilings, or partitions. Where tubing passes through walls, floors, ceilings, partitions, or similar installations, such tubing shall be protected by the use of weather-resistant grommets that shall snuggly fit both the tubing and the hole through which the tubing passes. Screw joints shall be made up tight with listed pipe-joint compound, insoluble in liquefied petroleum gas, and shall be applied to the male threads only.
 
(e) No piping or tubing joints shall be located in any floor, wall, partition, ceiling or similar concealed construction space.
 
(f) Where it is necessary to join sections of screw piping, right and left nipples and couplings shall not be used. Ground joint unions may be used to connect heat-producing appliances to the appliance branch piping.
 
(g) A label identifying gas supply connections shall be attached permanently on the outside of the exterior wall of the special purpose commercial modular adjacent to the gas supply connection which reads (as appropriate) either: 
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The appropriate BTUH input rating shall be marked by the manufacturer. Note:See Article 1, Section 4031 for label size and type of material.
 
 
(h) An anti-siphon trap vent device shall be permitted for use only as a secondary vent in accordance with the following:
(1) Installation of an anti-siphon trap vent device shall be in accordance with the terms of its listing.
 
(2) An anti-siphon trap vent device shall be installed in an accessible location that provides a free flow of air for the device.
 
(3) An anti-siphon trap vent device shall not serve more than two (2) fixtures.
 
(4) An anti-siphon trap vent device shall not be used for more than two (2) consecutive fixtures before being vented to outside atmosphere.
 
(5) An anti-siphon trap vent device that protects two (2) fixtures shall be drained, at a minimum, by a common 1.5 inch (38.1 mm) diameter drain.
 
(6) An anti-siphon trap vent device shall not serve as a primary vent for toilets or holding tanks.
 
(7) A fixture drain or main drain that bypasses a holding tank shall be vented by a primary vent in accordance with Chapter 9 of the California Code of Regulations, Title 24, Part 5, California Plumbing Code (CPC).
 
 
 
 
Notes
 
 Cal. Code Regs. Tit. 25, § 4534 
 
  
Note: Authority cited: Sections 18025 and 18028, Health and Safety Code. Reference: Sections 18025 and 18028, Health and Safety Code.
  
 
  1. Amendment of section and newNote filed 9-19-2011; operative 10-19-2011 (Register 2011, No. 38).