wrote:

I am trying to replace the shut off valves for the kitchen faucet. I
am using the compression type valve that connects to a copper stub
pipe. This has a thin copper or brass ring that fits over the stub.
It keeps dripping. I have tightened it to the point that the ring has
broken.
Any advice or tips on the proper techniques for this type of fitting?

Thanks
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I know this suggestion isn't "by the book" but it worked for me the
couple of times I ended up with a weeping compression fitting and
couldn't easily replace the parts and start over again.

I just backed the nut off and slid it away from the ferrule (ring) and
then pulled the pipe out of the fitting a bit.

Then I wrapped a few turns of 1/2" wide teflon pipe tape around the
ferrule. The edges of the tape lapped onto the pipe.

When I pushed the nut back and tightened it the teflon squished into the
gaps and the joint was "tighter than a bull's ass in fly season",
without any overtightening of the nut.

YMMV, but the mechanical principles made sense to me, and as I said
above, it sure worked for me.

HTH,

Jeff

--
Jeffry Wisnia

(W1BSV + Brass Rat '57 EE)

"Truth exists; only falsehood has to be invented."