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Review title: Leaks
Product review: When I connected the compression tester to the extension, it leaked at the male/female connection even with a new "O" ring and screwed in as tight as I could get it. Checked compression without the extension and it was 20 PSI higher than with the extension. Finally I expoxyed the male end of the tester to the female end of the extension. Now it works fine. I have three testers, so I sacrificed one to be permanently attached to the extension.
