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    NEW gas boiler losing pressure

    Heating Engineers

    Gas safe installed new gas boiler and heating. Then another plumber installed downstairs loo. Now when I flush the toilet the boiler loses pressure to zero and has to be filled every day. Even if I do not flush toilet pressure drops and I refill everyday. The plumber did connect to two pipes near boiler. Whats wrong and what can be done?

    Asked by Gavinder on 17th Mar 2021
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    Best Answer

    Ocean Field Gas

    "He’s connected to flow and return at boiler either that you have a leak on your heating pipes why did connect to two pipes at boiler ? He only needed to connect to cold water"

    Answered on 17th Mar 2021 - Member since Jun 2020 - report
    Go-to Plumbing & Heating

    "In this case Heating system losses of pressure could be wrong pipework installation. I would recommend a plumber/gas safe engineer to check your domestic and heating pipework. I hope this helps."

    Answered on 17th Mar 2021 - Member since Jun 2020 - report
    RJA Heating

    "Seems like the toilet has been fed off the circuit in my opinion"

    Answered on 17th Mar 2021 - Member since Oct 2020 - report
    McIntosh Heating & Plumbing

    "The answer is in the question!
    If the first guy was gas safe registered, get the second plumber back to resolve the issue."

    Answered on 17th Mar 2021 - Member since Mar 2020 - report
    DGN Gas

    "I think you need an engineer to attend and diagnose, I don't think you will get an answer like this."

    Answered on 17th Mar 2021 - Member since Mar 2019 - report
    john ten heating and plumbing solutions

    "There must be leakage along the joints or at the radiator, it could be dropping slowly.
    Since it is a new boiler I will rule out the expansion vessel losing air pressure"

    Answered on 17th Mar 2021 - Member since Apr 2016 - report
    R Lowndes Plumbing and Heating ltd

    "There are a couple of possibilities. 1; there could be a small leak somewhere on the system. The system only needs to lose a small amount of water to drop the pressure. 2; the blow-off valve may be letting by. This is located on the outside of the building, you should be able to see if this is dripping.

    The installation of the toilet will have no impact on the operation of the central heating system."

    Answered on 17th Mar 2021 - Member since Jan 2021 - report
    P H Gas Services

    "Very unlikely its to do with your toilet.
    You're losing pressure out the system either frin the Prv or from the Pipework somewhere.
    You need to get someone to have a look at the system whilst know what they are doing. Thank you PH Gas Services"

    Answered on 17th Mar 2021 - Member since Dec 2019 - report
    JP Heating and Plumbing Ltd

    "Unfortunately without seeing the job it is impossible to say, if you keep filling the boiler it will eventually break.
    I advise getting an engineer to take a look, he possibly connected wrong pipes"

    Answered on 17th Mar 2021 - Member since Jul 2018 - report
    DAN BADEA

    "I believe you have small leak but just to see how faster drip the pressure or in heating central need to change something"

    Answered on 17th Mar 2021 - Member since Jul 2018 - report

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