Gas installation gas tightness test connects leakage meter to test cock with test cocks setting pressure and observing leakage when main cock reopened

摘要

A gas installation gas tightness test connects a leakage meter to the test cock (1) after switching off the consumer, closing the test cock, opening the test channel cocks (4, 5) setting the pressure and opening the main equipment cock to measure the leakage. Independent claims are included for a gas test cock for use in the gas tightness test procedure.