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296-150C-1440  <<  296-150C-1450 >>   296-150C-1460

PDFWAC 296-150C-1450

Gas piping—Testing for leakage before appliances are connected.

(1) The piping system must stand a pressure of at least ten psi gauge for a period of not less than fifteen minutes without showing any drop in pressure.
(2) Pressure must be measured with a gauge calibrated to be read in increments of not greater than one-tenth pound.
(3) The source of pressure must be isolated before the pressure tests are made. Before a test is begun, the temperature of the ambient air and of the piping must be approximately the same, and constant air temperature must be maintained throughout the test.
[Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. WSR 96-21-146, § 296-150C-1450, filed 10/23/96, effective 11/25/96.]
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