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Drop in pressure boiler

Hi

The pressure gauge in my boiler is dropping one bar a day and I keep having to top it up.

I have had Homeserve check the boiler but they say that it is ok.

I have checked all visible pipes, rads etc for leaks.

I had a burst pipe which resulted in us moving out last year and my insurers have denied cover for water damage this year.

Has anyone any ideas as I am worried that there is a leak somewhere and I can't find it?

:(

Thanks

Comments

  • tweeter
    tweeter Posts: 3,958 Forumite
    Part of the Furniture
    If its a combination boiler checkout link.

    http://www.yell.com/plumbers/blog/boiler-losing-pressure/
    Peel back your baby's eyelid to find no nationality or religious identity mark there. Peer at your baby's eyes for them to reflect back just people-throw away your flags and religious symbols...



  • System
    System Posts: 178,375 Community Admin
    10,000 Posts Photogenic Name Dropper
    we have a condesning combi with the same problem it was the safety valve that had gone .
    This is a system account and does not represent a real person. To contact the Forum Team email forumteam@moneysavingexpert.com
  • gas4you
    gas4you Posts: 2,602 Forumite
    The expansion vessel needs checking before anything else. Can I assume Homeserve done this?
  • SHEILA54
    SHEILA54 Posts: 1,829 Forumite
    Part of the Furniture 1,000 Posts Combo Breaker
    gas4you wrote: »
    The expansion vessel needs checking before anything else. Can I assume Homeserve done this?

    You would think so but I wasn't here and my son in law saw them. I don't know if I can contact them again as the person that came out said that the boiler was fine and he took their word for it.
  • This happened to me a couple of weeks ago. I kept topping the boiler up and the next day the pressure would be low!
    It seemed to happen after I bled my radiators, so I think one of the rads was acting as an expansion vessel.
    I fixed it myself and was well chuffed, courtesy of UHM
  • SHEILA54
    SHEILA54 Posts: 1,829 Forumite
    Part of the Furniture 1,000 Posts Combo Breaker
    This happened to me a couple of weeks ago. I kept topping the boiler up and the next day the pressure would be low!
    It seemed to happen after I bled my radiators, so I think one of the rads was acting as an expansion vessel.
    I fixed it myself and was well chuffed, courtesy of UHM


    What is UHM please?
  • UHM is this site- http://www.ultimatehandyman.co.uk/expansion_vessel/index.php
    There are three pages on that page that show how to test, repressurise or replace an expansion vessel.
    When I checked my expansion vessel water came out of the tyre type valve, so I fitted an external one.
    It took me about 3 hours, but only cost about £25 for the bits.
    It has been working fine ever since!
    Also on each page you will see a link to a video, which helps people like me ;-)
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