Setting up for an air test on the DWV rough in a new house we're doing. My buddy and I are confident that everything is good to go. Well, pump the thing up, watch the gauge, sure enough, starts creeping ever so slow. Walk down to the main in the basement halfway in I hear pssssssss. We've got a pinhole in the pipe 4" from a coupling:furious:. Oh well, ya gotta expect the unexpected.