loud bathroom pipes

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    • #274194
      Anonymous

      We had our hot water heater replaced recently.
      Since then, when the toilet is finished filling, it makes a loud banging sound in the pipes.

      How do we “quiet” it down?

      Thanks
      Pat

    • #289330
      Harold Kestenholz
      Participant

      When the heater was replaced, the water was shut off for some period and water drained. An air pocket probably developed in the line near near the toilet so a water column can slam against pipes when the toilet valve shuts completely. If there is a hand valve below the toilet tank to shut the water off, you might turn the valve closed and then open it just a bit to let the water enter the tank slowly over a longer period of time than it does now. The slower velocity may stop the bang. If it does or it does not, a plumber asked to specifically stop this from occuring (without closing the valve) would look at the lines and tank mechanism to stop the noise.

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