Grundfos pump humming

Discussion in 'Plumbing and Central Heating' started by dyrck, 3 May 2021.

  1. dyrck

    dyrck

    Joined:
    3 May 2021
    Messages:
    4
    Thanks Received:
    0
    Country:
    United Kingdom
    Hi, my central heating uses a Grundfos UPS 15-50 which is about 15 years old. Over the last few months it has started humming, it's not very loud but in the wee small hours of the morning it resonates through the pipework and wakes me up.
    The pump is mounted in the middle of a horizontal L shaped run of piping and if I push gently on the pipes the hum disappears but I can feel a light vibration.
    Is it likely that the pump is knackered? I am loath to have a replacement fitted (UPS3 15-50/65 ??) just to find that a new unit vibrates and hums just as much.
    What should I do?
    Thanks for yor help
     
  2. Sponsored Links
  3. Harry Bloomfield

    Harry Bloomfield

    Joined:
    30 Dec 2018
    Messages:
    9,700
    Thanks Received:
    1,312
    Country:
    United Kingdom
    All pumps hum to some extent, made worse if they or the pipe presses against something resonant. See if you can push something between the pump/pipe to reduce the noise, like rubber.
     
  4. dyrck

    dyrck

    Joined:
    3 May 2021
    Messages:
    4
    Thanks Received:
    0
    Country:
    United Kingdom
    Trouble is the pump is a long way from any surface, with about half a metre of pipe either side of it. Perfect conditions to vibrate a little.
     
  5. Harry Bloomfield

    Harry Bloomfield

    Joined:
    30 Dec 2018
    Messages:
    9,700
    Thanks Received:
    1,312
    Country:
    United Kingdom
    Then it needs some support added, to a firm surface. Could you wedge a piece of timber in between the pipe and a solid wall, to see what effect that gives?
     
  6. Sponsored Links
  7. dyrck

    dyrck

    Joined:
    3 May 2021
    Messages:
    4
    Thanks Received:
    0
    Country:
    United Kingdom
    The nearest solid wall is a foot away from the pump. I'm wondering if I can put a wire stay in and effectively suspend the whole arrangement.
     
  8. Harry Bloomfield

    Harry Bloomfield

    Joined:
    30 Dec 2018
    Messages:
    9,700
    Thanks Received:
    1,312
    Country:
    United Kingdom
    Suck it and see, it's just trial and error. Personally, I would start with the simplest fix and bit of timber just wedged lightly in between pipe and wall. Once you know what works, then make a more permanent job of it.
     
  9. TimboTwo

    TimboTwo

    Joined:
    30 Jan 2021
    Messages:
    169
    Thanks Received:
    28
    Country:
    United Kingdom
  10. dyrck

    dyrck

    Joined:
    3 May 2021
    Messages:
    4
    Thanks Received:
    0
    Country:
    United Kingdom
    Thanks to everyone for your help and advice.
     
  11. DIYnot Local

    DIYnot Local

    Joined:
    3 Sep 2019
    Country:
    United Kingdom

    If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

    Select the supplier or trade you require, enter your location to begin your search.


    Are you a trade or supplier? You can create your listing free at DIYnot Local

     
Loading...

Share This Page