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xoxoxoBruce · 02-05-2019, 02:13 PM

I've handled over 100,000 feet of that 1/2 inch copper and never seen those plugs. The only copper I've seen sealed is refrigeration tubing, so I don't think it's a clean thing. Maybe to keep the end from getting ovaled if somebody steps on it, or with all the new solderless fittings, to keep the ends from being chewed up and scratched.

02-05-2019, 02:13 PM	#76
xoxoxoBruce The future is unwritten Join Date: Oct 2002 Posts: 71,105	I've handled over 100,000 feet of that 1/2 inch copper and never seen those plugs. The only copper I've seen sealed is refrigeration tubing, so I don't think it's a clean thing. Maybe to keep the end from getting ovaled if somebody steps on it, or with all the new solderless fittings, to keep the ends from being chewed up and scratched. __________________ The descent of man ~ Nixon, Friedman, Reagan, Trump.