How to Replace a Plumbing Shut-Off Valve – This Old House

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21 Comments so far

Charles DameryPosted on  3:21 pm - Dec 27, 2014

As long a they remember to close the drain before turning the water back
on. Or maybe that’s on Richard’s blooper reel.

jesusnthedaisychainPosted on  6:11 pm - Dec 27, 2014

That guy actually knew how to use a crescent wrench properly. I’m
impressed because I’ve seen it used backwards so many times, both in real
life (I’ve got the skinned knuckles to prove it) and on this show.

Doug ReedPosted on  6:42 pm - Dec 27, 2014

1) With the stem pointed up like that, the drain is above the pipe, making
it so the entire horizontal run won’t get drained at all. Kinda defeats
the whole point of having the drain in the first place.

2) Despite professing a preference for ball valves (which I agree with
100%), Richard rarely installs them, usually opting for those crappy
stopper valves. The only reason I can think of as to why is that they are
cheaper. Probably not “best practice” and definitely not confidence

Porsche924TimPosted on  8:16 pm - Dec 27, 2014

I only have a Mickey hacksaw, not a Minnie… I’ll have to get a Minnie

NibiruLivesPosted on  11:20 am - Dec 28, 2014

The valve doesn’t need to leak ~ a bit of condensation from the air causes
the corrosion.

san379Posted on  1:33 pm - Dec 28, 2014

it takes 1 second to cut it with a angle grinder and a metal cutting thin
blade… works great

Danny HerreraPosted on  4:41 pm - Dec 29, 2014

Common corrosion issue with copper…. Personally I would ripped out all
that junky copper and replaced it with PEX. You will never ever have any
type of corrosion issue with PEX while saving money at the same time. That
valve will have to be replaced AGAIN in a few years.

mark pPosted on  2:53 am - Jan 4, 2015

That’s great until it has to be replaced again. The compression fitting
will have to be cut off and new pipe soldered the next time. Why not solder
a new valve into place?

ibanez1403Posted on  6:39 pm - Jun 22, 2015

Can this solder-less valve be used as a main valve for a house ?

THOMAS MCDONNELLPosted on  7:39 pm - Sep 30, 2015

solder the SOB get er done, solder next time when replacing it,The End

PanamaSticksPosted on  9:30 pm - Nov 21, 2015

Bigger problem when this valve fails. You will have to cut the pipe to
remove the ferules.

WangChung81Posted on  5:52 pm - Mar 22, 2016

Since they missed this…
Step one: Turn the water main off!

Freddy RotzbearPosted on  7:10 pm - Mar 30, 2016


John FoleyPosted on  9:33 pm - Jul 6, 2016

I’m an amateur and have done soldering. The press on looks easier but I
don’t trust it. Soldering is a pain but I prefer it.

Rocket RiderPosted on  6:49 pm - Jul 22, 2016

how many teeth per inch should the minihacksaw have to cut through the
copper pipe?

Jude SanchezPosted on  11:27 pm - Nov 12, 2016

what grit sandpaper did you use

Rich TPosted on  5:03 am - Nov 14, 2016

Spray some white grease or T9 boeshield on that new valve and it will never
corrode again.

Cedrick KasongoPosted on  10:45 am - Nov 20, 2016

l m Cedrick l like plumbing

Cedrick KasongoPosted on  10:45 am - Nov 20, 2016

l m Cedrick l like plumbing

Rich SantanaPosted on  1:50 pm - Nov 24, 2016

That’s corrosion, copper and brass it causes galvanic action

Justen HansenPosted on  4:05 pm - Nov 29, 2016

I did this exactly but it leaks because the ferrule curled around the end
of the pipe. Make sure the ferrule slides completely on to the pipe and
doesn’t overhang. I think the only way this method will work is if your
pipe has a little play so you can close the gap a little. My pipes are
fixed so this method doesn’t work.

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