Dishwasher install leads to water hammer

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Terry, Apr 11, 2010.

  1. Terry

    Terry Administrator Staff Member

    Joined:
    Aug 17, 2004
    Occupation:
    Plumber
    Location:
    Bothell, Washington
    Dishwasher install leads to water hammer.

    Some codes like the UPC, require hammer arrestors on devices that have quick closing valves.
    In a home, that would be
    Ice Maker
    Dishwasher
    Washing Machine

    I've also installed them in commercial bathrooms that use Flushometers.
    Why have constant banging pipes if it can be avoided?

    Water Hammer Arrestors

    [​IMG]
     
    Last edited: Jan 1, 2011
  2. hj

    hj Moderator & Master Plumber Staff Member

    Joined:
    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    I have had a lot more flush valves cause "water hammer" when they start to flush, which an arrestor will not prevent, than when they shut off.
     
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