The trouble is that some people don't make sure that their connections are tight. I don't know how many pools I fail when I go out there and find loose connections on pool bonding connections. The pool installers get mad at me and tell me that "We went back and tighten it up. Can you pass us now or do you have to go back and see for yourself?" Of course the answer is that I want to go back. However that slows up the job and they get mad at me. OH WELL!