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Thread: New Peerless faucet, water comes out shower head and faucet

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    DIY Junior Member pmgreen4117's Avatar
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    Default New Peerless faucet, water comes out shower head and faucet

    Hello everyone,

    I have just installed a peerless faucet and shower head in my bathroom. It is the kind that has the single handle control for both the water pressure and temperature. I got it all hooked up yesterday and went to test it and when I turn the water on, it comes out the faucet as well as dribbles out the shower head as well. If i pull the plunger thing up on the faucet, the shower operates fine. I am using 1/2 PEX to do all of my connections. Does anyone have any idea why it would be doing this? Thank you for your help!

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    Journeyman/Inspector Inspektor Ludwig's Avatar
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    When you turn on the bath faucet, is the diverter all the way down or can you push the diverter down with your hand just a little bit?

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    Plumber krow's Avatar
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    Quote Originally Posted by pmgreen4117 View Post
    . I am using 1/2 PEX to do all of my connections. Does anyone have any idea why it would be doing this? Thank you for your help!
    Don't use pex to connect the spout and shower pipes. The fittings will be small enough to restrict the flow from the spout and allowing it to go up the shower pipe.
    Always use a full port rigid tubing such as copper for the faucet assembly. You can run your pex to the hot and cold sides only.

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    Plumber jimbo's Avatar
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    Unfortunately, if you had read the instructions BEFORE you did this, you would have known the PEX from the valve down to the tub spout will cause this problem.

    You can lower the house pressure somewhat, which will lessen the problem. I don't know what else you can do.

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    Master Plumber master plumber mark's Avatar
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    Talking Now that is a new one I have never heard of....

    Quote Originally Posted by jimbo View Post
    Unfortunately, if you had read the instructions BEFORE you did this, you would have known the PEX from the valve down to the tub spout will cause this problem.

    You can lower the house pressure somewhat, which will lessen the problem. I don't know what else you can do.
    Jimbo, I have never heard of that one before.....why is this anyway????

    I sort of figured that he plumbed the faucet in up-side down ...

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    Retired Defense Industry Engineer jadnashua's Avatar
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    The simple pull-up divertors rely on the fact that the flow out the spout is normally wide open and unrestricted. Pex is smaller in diameter, and the flow rate can be larger than can freely flow through the pex and out the tub spout. If that happens, then water backs up and can dribble out the showerhead. It's sort of like putting your finger over the end of a hose, but it backs up and goes out the showerhead instead - where there's less restriction. Normally, the height of the showerhead riser is enough so it's easier to go out the tub spout, but not if you use pex. I've only installed a few, but it is very clear in the instructions of those I've installed...do NOT use pex out of the valve, or at least for the tub spout.

    How did you get the tub spout firmly anchored if you used pex?
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

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    Moderator & Master Plumber hj's Avatar
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    Default shower

    PEX will not ALWAYS cause the problem but it will happen often enough that you should not temp fate and use it for the tub spout. Besides the PEX pipe being smaller, the real problem is the EXTREME restriction caused by the fittings being inserted INTO the tubing.

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