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DaringDave68
Washer Plastic Outlet Box
DaringDave68

I need to replace the old hose bibs for my washing machine at the drain. I've done this before and know how to sweat copper pipe. What I don't know is how to do this without melting the plastic box. Please advise.

A. Spruce
Re: Washer Plastic Outlet Box
A. Spruce

If you can shield the plastic box with a plumbers mat, try that, but most likely you'll need to open the wall and either cut the pipes or replace the whole box. Before you go to that extreme, make sure the valves are not screwed in place. You will want to hold the pipe side with pliers while trying to unscrew the valve. Remember, turn right to tighten, left to loosen.

dj1
Re: Washer Plastic Outlet Box
dj1

I don't like to install washing machine supply boxes, I rather install two separate valves.

Since you have a box already and want to keep it, you will have to work with it.

A metal shield to stop the flame and to absorb some of the heat might work. A wet towel wrapped around the pipe to absorb heat but not wetting the area being soldered might work too. If these methods fail, you will have to remove the box or replace it.

Can you upload a picture? Upload it to a host like photobucket and post your link here.

Fencepost
Re: Washer Plastic Outlet Box
Fencepost

Cut the pipe a few inches below the existing valve. Remove the valve from the box.

Solder a stub into a new valve. Allow it to cool; insert into the box. Then solder the pipes together with a copper coupling.

This will help keep the heat away from the plastic box, give you a little more working room, and eliminate the need to try and de-solder the existing valve from the pipe.

Yes, it's three times as much soldering, but it's a thousand times easier than desoldering the existing valve.

Mastercarpentry
Re: Washer Plastic Outlet Box
Mastercarpentry

Fencepost nailed it. You keep the heat away from the box by soldering elsewhere. I hate these flimsy boxes but customers want them so I'll install them.

Phil

Fencepost
Re: Washer Plastic Outlet Box
Fencepost

If you're not comfortable soldering in the wall, do like I recommended before, except use a SharkBite-type coupling instead of a solder coupling.

Mastercarpentry
Re: Washer Plastic Outlet Box
Mastercarpentry

I'm rarely comfortable at all anymore- arthritis, bad back, gout in the knees. The usual stuff.

Does this mean I must use 'Sharkbites" instead of soldering now?

Phil

dj1
Re: Washer Plastic Outlet Box
dj1
Mastercarpentry wrote:

I'm rarely comfortable at all anymore- arthritis, bad back, gout in the knees. The usual stuff.

Does this mean I must use 'Sharkbites" instead of soldering now?

Phil

Ah, you too?

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