Shower drips while tub runs

Discussion in 'Shower & Bathtub Forum & Blog' started by eastert, Nov 20, 2009.

  1. eastert

    eastert New Member

    Messages:
    6
    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. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,843
    Location:
    Cave Creek, Arizona
    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. johnjh2o1

    johnjh2o1 Plumbing Contractor for 49 years

    Messages:
    1,143
    Location:
    South*East
    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. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,843
    Location:
    Cave Creek, Arizona
    spout

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

    eastert New Member

    Messages:
    6
    To clarify: I ran copper down and out. There is only one 90 degree fitting between the valve and the tub spout.
  6. Terry

    Terry Administrator Staff Member

    Messages:
    15,136
    Location:
    Bothell, Washington
    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. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,156
    Location:
    New England
    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?
  8. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,843
    Location:
    Cave Creek, Arizona
    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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