Section 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.Wash. Admin. Code § 296-150C-1450
Statutory Authority: RCW 43.22.340, [43.22.]355, [43.22.]360, [43.22.]432, [43.22.]440 and [43.22.]480. 96-21-146, § 296-150C-1450, filed 10/23/96, effective 11/25/96.