Well after spending most of monday ..under a house ..running a New 1" gas line in blackpipe..thought everything was fine..went to test..for the inspector..had a leak..went through everthing twice..with preasure and soap..finally found a pin hole in a coupling..Right in the bottom of the H in china..glad it was only a few feet from the crawlspace opening.. just got me wondering what time..might do to a new gas line..and are there any american made coupling's and elbows..or has anybody else had problems....