Leak in KWC Shower Rough valve

Discussion in 'Shower & Bathtub Forum & Blog' started by garym, Nov 3, 2008.

  1. garym

    garym New Member

    Messages:
    13
    Location:
    Florida
    Thoughts on possible sources of this problem are VERY welcome. Background: New install of "KWC, 1/2" Rough Valve for Thermostatic Trims - K.37.93.61.931.38" LINK:
    http://www.kwcamerica.com/-hansa/doc/technical/specsheet/K.37.93.61.931.38 Spec Sheet.pdf

    new copper lines to valve. The Tub spout drips (sometimes slow drip, sometimes nothing, and sometimes a small stream of running water). Turning on the sink or kitchen faucet can make the leak worse (or start if not currently leaking). So a change in water pressure affects leak? Plumber thought the valve was bad. Replaced with new valve. Didn't leak at all overnight. Next morning, turned on bathroom sink, then new shower valve started leaking again. He thinks another bad valve. I find this hard to believe and I'm looking for some ideas on what else might be wrong with the install that causes the valve to leak. Thoughts appreciated.
  2. Redwood

    Redwood Master Plumber

    Messages:
    7,450
    Location:
    Connecticut
    I have been known to put KWC and Hansa brass in scrap bins...
  3. hj

    hj Moderator & Master Plumber Staff Member

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

    Valves do not leak when the pressure drops,and seldom when it increases. And if it shuts off properly it should not start leaking. Unless, the handle is a heavy lever one and when the pressure decreases it lets the mechanism rotate easier and then the valve could start leaking. Maybe you need a better brand of valve,or reposition the handle.
  4. Redwood

    Redwood Master Plumber

    Messages:
    7,450
    Location:
    Connecticut
    But HJ they probably spent a G-Note or better on it!:eek:
  5. garym

    garym New Member

    Messages:
    13
    Location:
    Florida
    touche' What brands do you recommend for good reliability that have nicer than average fixtures (pressure and temp controls, with diverter). Thanks.
  6. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,154
    Location:
    New England
    Note, I'm not a pro, but have had good luck with Grohe. The pros here seem to like the Delta 1700 rough-in valve and your choice of trim.
  7. Redwood

    Redwood Master Plumber

    Messages:
    7,450
    Location:
    Connecticut
    Grohe is good with lots less parts headaches...

    The majority of what I do is Moen or Delta though...
    I believe Moen has the best customer service out of any of them...
Similar Threads: Leak Shower
Forum Title Date
Shower & Bathtub Forum & Blog Need help identifying shower valve (leaks) Sep 14, 2014
Shower & Bathtub Forum & Blog Leaking AS Press Bal Shower Valve Sep 11, 2014
Shower & Bathtub Forum & Blog Shower Valve Solder Leak Aug 3, 2014
Shower & Bathtub Forum & Blog Leaky shower... Is this fix correct? Jul 29, 2014
Shower & Bathtub Forum & Blog Leaking Sterling 3-handle Shower Tub faucet Jun 25, 2014

Share This Page