Do water hammer arrestors wear out?

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by ArtBacon, Feb 23, 2014.

  1. ArtBacon

    ArtBacon New Member

    Joined:
    Feb 23, 2014
    Location:
    Minnesota
    I have a 5 year old "High Efficiency" LG washing machine. The intake valves open and close so fast it cause a pretty strong water hammer. When I had the washer delivered and hooked up, I put a water hammer arrestor on the hot an cold intakes. The water hammer noise seems to be getting louder again. Do these devices wear out, or are there some that work better than others? Thanks
     
  2. LLigetfa

    LLigetfa DIYer, not in the trades

    Joined:
    Feb 6, 2011
    Occupation:
    Information Technology
    Location:
    NW Ontario, Canada
    You don't say what style of arrestors you used. The type that have no moving parts cannot possibly wear out but they can get waterlogged over time as the air gets absorbed into the water.

    The gas charged piston and O-ring style could wear out if there is sediment.
     
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  4. Terry

    Terry Administrator Staff Member

    Joined:
    Aug 17, 2004
    Occupation:
    Plumber
    Location:
    Bothell, Washington
    They can wear out.
    They make some that fit right on the washer, and the hose threads onto that.

    [​IMG]
     
  5. hj

    hj Moderator & Master Plumber Staff Member

    Joined:
    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    It is not so much that they "wear out", but rather the "O" rings lose their lubrication and so the piston gets stuck and cannot move to absorb the water shock.
     
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