Noisy hot-water, re-circulating pump

Home Forums Public Forums General Plumbing Noisy hot-water, re-circulating pump

Viewing 1 reply thread
  • Author
    • #275046
      Avatar photomark fogarty

        I have a Grundfos, hot-water, re-circulating pump that reverberates a low frequency hum throughout the pipes in my house. Are there some insulating unions, or some way to quieten the noise generated by this pump? Do these pumps usually make noise, or might I have a defective pump?

      • #290984
        Avatar photoGuest

          They are usually quiet, but at times the tuned length of the pipe run and the water flow rate set up a hum. This may be changed by a speed change and/or changing the back presure on the pump by turning a balancing valve to adjust the flow. Sometimes the circulator has to be changed out.

      Viewing 1 reply thread
      • You must be logged in to reply to this topic.

      Pin It on Pinterest

      Share This