I've had similar problem. Water shut off, in a
bathroom sink vanity. The answer turned out
to be buying a new shutoff valve at the store, and
replace the shutoff. Older house, galvanized pipe.
I used a smaller pipe wrench on the pipe, and larger
on the valve, thread it off. Don't let the force turn the
galv pipe, just the valve.
Teflon tape, and then Recorseal #5 on the exposed
threads, reassemble, hope for the best.
It may be possible to shut off the water, take the valve
apart, replace the faucet washer, and put it back
together. I've done that, also.
Christopher A. Young
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I'm trying to take off my old faucet and replace it with a new one in
my bathroom's vanity. I had no problem shutting off the cold water
valve, but the hot one is giving me a hard time. I have about 98-99%
turned off and water still comes out of the faucet..albeit..its small
steady and solid..its not dripping. I applied W40 a couple of times,
waited and still can't shut it off completely. I am trying to avoid
using my main shutoff just for this and was wondering if there
anything else i can do. Would just taking off the handle help? Hate to
call a plumber for a small yet nagging situation. Thanks