Toilets, Sinks, Showers, Tubs and Disposals - shutoff valve leaking

:confused: :confused: :confused:
changed out my leaking bath sink supply lines with brand new ones...
i still have a small drip from the compression shutoff valve connector to the compression nut...

would an 'o' ring help, or might the compression fitting not be seated correctly???? driving me nuts...

i have put teflon tape on all threads, and i'm sure i've got everything tight...

any help is apprecieated........

Are you sure that the water line was all the way down in the compression fitting and through the sleeve or ferrule when you tighten it up the first time. Lot of times people dont get it all the way in the compression fitting.Dont put anything else around it there .

ED ;)

It's a compression fitting, so the seal is NOT in the threads. Teflon or paste there just prevents the threads from locking up with corrosion - easier to take apart someday.

The actual seal is in the smooth, compressed, mating of some surfaces as you squish them together with a nut. You can see a rude kind of compression fitting in garden hose connections - the threads might be sloppy but so long as the rubber ring is there the joint holds pressure.

In your shutoff valve there are at least two compression seals. One between the valve body and the valve handle stem, with some relatively elastic intermediate ring or packing between them, forced together by a packing nut. Another, on the line, probably uses a deformable brass ring as the intermediate. It should slip snugly over the supply line, and seat cleanly with mating geometry in the valve opening. Then squashing it with the packing nut causes it to pinch the softer copper or plastic supply line.

I have the same problem.... so did u fix this by tightening it some more or what...i would really like to know how you stopped the leak ...thanks.