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Water hammering after disconnecting a washing machine. I have just replaced our old washing machine that took a hot and a cold feed, with a new washing machine that only takes a cold feed. I have turned the shut off lever to prevent the hot water flow and I have also capped it off with a 3/4" brass blanking cap, just to be on the safe side. However, since stopping this hot water flow, I am getting water hammering whenever I turn on the hot water tap in the kitchen (this is the pipe that the mashing machine tap was tee'd off of). This is the only tap that is causing the water hammer, all other taps are fine. If I reconnect the old hot water hose and feed the hose into the sink and re-open the shut off valve, the banging goes away. Is this going to require a plumber to sort it out, or is it a simple fix?

Posted by ron2464 on

  • Anonymous Mar 13, 2014

    a noise like a thump when a water tap in the house is opened quickly like when an auto wash machine starts

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Jack Spooner

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You can use a water hammer arrestor and hook it up to old washing machine hot valve by use of a standard washer hose. This type of aresstor is basically. a shock absorber. You will needtonget pipe adapters to go from hose thread to pipe thread.If you can mount the hammer arressror higher then the washer valve. Hook everything up and turn old hot water valve back on. This shoulg take care of your problem. Thank you.

Posted on Jun 02, 2011

  • ron2464 Jun 02, 2011

    Hi frodo959,

    Thank you very much for your quick response. I will purchase one and hopefully that will cure the problem.

    Thanks again.

    Regards

    ron2464

  • H2o4nyc Nov 01, 2011

    Strap the pipe to the wall. you probably pulled out the pipe support when capping the line.

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1 Answer

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