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(b) Pipe shall be at least Schedule 40 and fittings shall be at least standard weight in sizes up to and including 6-inch nominal.
(c) Copper tubing shall be Types K or L in accordance with the Standard Specification for Seamless Copper Water Tube, ASTM B88-96 which is hereby incorporated by reference.
(d) Piping shall be steel, wrought iron, brass or copper pipe, or seamless copper, brass or stainless steel tubing, except as provided in Sections 4822 and 4823.
(e) Service piping systems shall be protected by pressure relief devices set to function at not more than the design pressure of the systems and discharging upwards to a safe location.
Authority cited: Section 142.3, Labor Code. Reference:Section 142.3, Labor Code.
1. New section filed 5-16-75; effective thirtieth day thereafter (Register 75, No. 20).
2. Amendment filed 7-16-76; effective thirtieth day thereafter (Register 76, No. 29).
3. Amendment of subsections (a), (c) and (e) filed 6-12-87; operative 7-12-87 (Register 87, No. 26).
4. Amendment of subsection (c) filed 1-6-99; operative 2-5-99 (Register 99, No. 2).
5. Amendment of subsection (a) filed 6-2-2003; operative 7-2-2003 (Register
2003, No. 23).