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Discuss Getting Water hammerage at boiler. in the Plumbing Forum area at UKPlumbersForums.co.uk.

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  1. Azz

    Azz New Member

    went to see a job and boiler is getting water hammerage when taps are closing fast. I thought this would be just hot water pipe as the taps in the house are quarter turns. The problem is, it is also causing hammage to boiler when using cold water pipes as well and when using the cistern flush.
    I take it I need to install shock arestors but where would it be recommended?
    the boiler is main combi 24he and I think, this problem is causing diverter valve damage as the customer changed valve a year ago and its already has leaking marks and domestic water heat is leting by to the heating side.
    Any sugestions?
     
  2. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    Your water hammerage !!! could be something as simple as a loose pipe/s .
    Have you any idea what the mains pressure is ?
     
    • Agree Agree x 1
  3. scott_d

    scott_d Plumber GSR Top Contributor!!

    Old dead leg somewhere ?
     
    • Like Like x 1
    • Agree Agree x 1
  4. Azz

    Azz New Member

    I did try holding cold water and hot water pips firmly under boiler while having taps turned on and off to eliminate loose pipes but it is still hammering. Would this be correct to eliminate loose pipe diagnostic. The sound is mainly coming from boiler.
     
  5. Azz

    Azz New Member

    Not sure of mains pressure but it seemed average mains flow
     
  6. CBW1982

    CBW1982 GSR Top Contributor!!

    If it’s at all outlets and we, then as above could be dead legs in system with trapped air. It can also be stopcock jumper or a failing quarter turn tap. It all depends on how much water hammer - is it vibrating the pipes whilst water is being used?
     
  7. DuncanM

    DuncanM Plumber GSR

    I would look at pressure and cover the whole house with a pressure reducing valve after the stop cock.
     
  8. Azz

    Azz New Member

    No there are no vibration to pipes whilst in use.
    Pressure just seems average.
     
  9. Matchless.plumb

    Matchless.plumb Trusted Plumber GSR Top Contributor!!

    I would additionally get a shock arrestor installed underneath the boiler
     
  10. CBW1982

    CBW1982 GSR Top Contributor!!

    I would be looking at the stopcock jumper and taps then to rule those out. Then maybe fit pressure reducing valve, shock arrestor.
     
    • Like Like x 1
  11. townfanjon

    townfanjon Trusted Plumber GSR Top Contributor!!

    This is sounding more like a boiler problem, you will be faster getting a gas safe guy to take a look .
     
    • Like Like x 2
  12. Azz

    Azz New Member

    Hi, I am gsr and have previously asked to join the forum as would like to asked in depth questions which I am unable to get response on the open forum.
    If this is a boiler problem then why would it hammer when cold water taps are open to?
     
  13. Matchless.plumb

    Matchless.plumb Trusted Plumber GSR Top Contributor!!

    If you are gas safe please send your gas safe number to @Harvest Fields@Harvest Fields @ShaunCorbs@ShaunCorbs @Riley@Riley they will help you to sort it out
     
  14. Azz

    Azz New Member

    Many Thanks
     
  15. CBW1982

    CBW1982 GSR Top Contributor!!

    Maybe it's not boiler related, but have you checked anything that we have suggested?
     
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