I guess from the responses, what we are seeing is that the main problem is that a good many electricians do not use the fittings properly. They also seem to do a better job using the set screw (because it is easier) and often avoid tightening compression fittings as they should be.
So, do we spec a job in anticipation of poor workmanship? Do we not insist on better materials becaus we know that electricians will not do the required work?
Anyway, if the fittings are installed properly, I still cannot imagine set screw over compression.
Push down on a pipe with your finger tip as hard as you can and have someone pull the other end.
Wrap your finger around a pipe without nearly so much tension and have someone pull the other end.
Who holds the pipe easier? Tom
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