Tub/shower Valve

gercon

I am installing a new MOEN tub / shower setup in my bathroom. I would like to use pex for all the piping. Are there any concerns using pex to connect the valve to the spout or the shower head?

Dan_Watson

YES!!! its called stacking, is it a single handle or 3 handle.

reveivl

Pex is good to the valve but use Cu for the spout.

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From where does knowledge come? If you need to know what is in a box, you could ask someone (not reliable), you could pray, (not useful), you can consult with the scripture (not helpful) or you could open the box (science)

Double-A

Gercon,

Please fill out your profile a bit more (location) and post an introductory post in the Introductions forum, please.

We discourage DIYs on this site and encourage all new posters with DIY questions to post on our sister site, DIYChatRoom.com.

Welcome to the site.

Always, what in the heck is "stacking"?

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New York Times, July 20, 2006

Dan_Watson

well acording to moen stacking is when the water pressure on a single handle tub and shower mix valve is restricted while filling the tub by utilizing the spout and some of the water begins to come out of the shower head. from my understanding when pex is used for the spout, the fittings provide enough resistance by narrowing in diameter that when you are filling the tub not enough water can get out and it travels up and out of the head, same thing happens when you place the valve and the shower head to close.

gercon

Thank's guys. I guess the right thing to do is use copper for the spout and pex for the rest.

orson

I put a a big fat glob of construction adhesive behind the shower ell before i attatch it to the bracing if I use PEX. Some plumbers I've worked with insist on copper even for a few feet of the supplies so that the whole assembly is rigid.