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47-2 lwco with autofill hammering at end of feed

I had a similiar problem .Iinstalled a tee with a arrestor and it worked But also see if you have a pressure reducing valve, it may be bad, I had city water pressure at 150 and the reducing valve failed .something to look at


  • scottPW
    scottPW Member Posts: 6
    47-2 lwco with autofill hammering at end of feed

    Hi, I have a customer with a 47-2 lwco and autofill (both brand new) that, at the end of a feed, begins to flutter or hammer the inlet water line loudly. My guess is that because of the mechanical design of the fill, it does not shut off immediately like a solenoid type. Will a water hammer arrestor solve this? It flutters for a good 20 seconds. thanks, scott
  • Tommy_4
    Tommy_4 Member Posts: 2

    Try disconnecting the piping on the boiler side of the LWCO and check for restrictions. You'll probably find a scale build-up right at the nipple that enters the bottom of the boiler. Clean and flush this conection. Usually this causes the boiler to overfill. You could also do a broken union test on the LWCO. If he valve closes with out hammerring during the test, the feeder is OK and start looking for the restriction.
  • Empire_2
    Empire_2 Member Posts: 2,343
    incomming water pressure

    Try throttling the incomming water valve down. Too much pressure will cause this.
  • Mad Dog_2
    Mad Dog_2 Member Posts: 3,471
    I agree throttle it down

    and also make sure all the piping is secure. Some good pipe insulaTION and strapping will quiet things down too./ M ad Dog

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  • Anthony Menafro
    Anthony Menafro Member Posts: 189

    Make sure that your piped in properly. If you pipe it in backwards you'll get the same flutter while it's trying to close.

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