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Thread: Shower drips while tub runs

  1. #1

    Default Shower drips while tub runs

    I installed a new tub fixture. It is the two handle type with 1/2 inch copper going up to the shower and 1/2 copper going down and over to the tub spout. When I run the tub, water drips out of the shower. What might be the problem?

  2. #2
    Moderator & Master Plumber hj's Avatar
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    Default valve

    Normally the only thing that causes that symptom when you have used copper down to the tub spout is that the valve is installed upside down.

  3. #3
    Plumbing Contractor for 49 years johnjh2o1's Avatar
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    When you say you ran the tub spout down and over are you saying it's not just under the valve? If so this may be your problem. If you have to many fittings between the valve and the spout the added restriction is forcing some water to the shower head.

    John

  4. #4
    Moderator & Master Plumber hj's Avatar
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    Default spout

    I assume he meant "down and out" rather than "down and over, (and then out)".

  5. #5

    Default Shower drips while tub runs

    To clarify: I ran copper down and out. There is only one 90 degree fitting between the valve and the tub spout.

  6. #6
    Forum Admin, Expert Plumber Terry's Avatar
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    Can you post a picture of the valve.

    The side toward the shower is a reduced size, forcing water to the tub first.
    If the valve is upsidedown, then some water will be forced up to the shower head.

  7. #7
    Retired Defense Industry Engineer jadnashua's Avatar
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    Some valves don't want you to use both outputs...they want a twin-el if you need both, then cap the other valve outlet. What does the instruction sheet say? Does it say you can use both?
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  8. #8
    Moderator & Master Plumber hj's Avatar
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    Default valves

    Those valves do not have the shower restrictor and are usually thermostatic valves, such a Grohe. But if they were installed improperly, it would be a "gush/flood" from the shower head, not a drip.

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