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PDFWAC 296-307-41511

Valves and accessories.

(1) Valves in the assembly of multiple container systems must be arranged so that containers can be replaced without shutting off the flow of gas in the system.
An automatic changeover device is not required.
(2) Regulators and low-pressure relief devices must be rigidly attached to the cylinder valves, cylinders, supporting standards, the building walls or otherwise rigidly secured and must be installed or protected so that weather will not affect their operation.
(3) Valves and connections to the containers must be protected while in transit, in storage, and while being moved into final use, as follows:
(a) By setting into the recess of the container to prevent the possibility of being struck if the container is dropped on a flat surface; or
(b) By ventilated cap or collar, fastened to the container capable of withstanding a blow from any direction equivalent to that of a 30-pound weight dropped four feet. Construction must ensure that a blow will not be transmitted to the valve or other connection.
(4) When containers are not connected to the system, the outlet valves must be kept tightly closed or plugged, even on empty containers.
(5) Containers having a water capacity in excess of 50 pounds (approximately 21 pounds LP-gas capacity), recharged at the installation, must have excess flow or backflow check valves to prevent the discharge of container contents in case of failure of the filling or equalizing connection.
[Statutory Authority: RCW 49.17.010, 49.17.040, 49.17.050, and 49.17.060. WSR 20-21-091, § 296-307-41511, filed 10/20/20, effective 11/20/20. WSR 97-09-013, recodified as § 296-307-41511, filed 4/7/97, effective 4/7/97. Statutory Authority: RCW 49.17.040, [49.17.]050 and [49.17.]060. WSR 96-22-048, § 296-306A-41511, filed 10/31/96, effective 12/1/96.]
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