Supply valve replacment

[john6221]

I want to replace my kitchen faucet, but the supply valves are shot. No problem, I bought the parts to replace them. One of the old ones is compression, the other one a sweat.

My question is, can I just cut off the sweat valve copper pipe and not have to de-solder it? I know that it will shorten my stub-out, but I will still have 2 inches coming out from the wall, and I'm replacing them with push-fit valves.

Thanks.

[sisto]

Yep, just cut it off as far out as possible and then use the new compression fitting. I did the same to all the valves in my house in 1999 when I bought it and no problems.

[paddedhat]

Make sure to cut them cleanly with a tubing cutter and lightly sand then till they shine, particularly if they have old paint or other gunk on them.

[john6221]

Awesome, thanks everyone!

[zolotiyeruki]

Also, after cutting the pipe, make sure you debur the cut surface--the bur causes turbulence in the water that can lead to corrosion later on.

[john6221]

Do I just use a metal file to debur?

[zolotiyeruki]

Do I just use a metal file to debur?

The pipe cutter has a flat, wedge-shaped piece of metal hanging off the side.  You jam the pointy end of that wedge into the pipe and turn it around.

[john6221]

Well, everything worked! One of the old valves was sweat and the other compression. The compression was too corroded to remove so I just ended up cutting them both with the pipe cutter. Then I pushed on the new valves, turned the water back on, and nothing leaked! Was a pretty good feeling to DIY.