Compression supply valve leaks

[William Ryan]

I replumbed my house about 15 months ago using “L” grade copper. Under the sinks I used supply valves with compression fittings (to the 1/2″ copper). Since then at least half of those valves have dripped at one time or another at the 1/2″ compression fitting. None of the 150 or so sweat joints have failed.

When one does leak I first try tightening – if that doesn’t work I remove it and reinstall it and that usually works – at least for awhile.

Is it possible that these valves are just crap? I got them at Menards. I’m now ready to go to sweated valves.

I hate to have to cut-off any of the pipe stubs – is it possible/advisable to sweat new valves in place without removing the compression ring (that is – sweat the valve on the pipe stub that extends past the compression ring)?

Thoughts?

[racefanoneParticipant]

Try putting some pipe dope on the compression sleeve and then put the valve back together

[edbreyerParticipant]

thanks – I’ll give it a try!

[Author]

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