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Topping up closed central heating system

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  • 12-01-2009 11:34am
    #1
    RebelButtMunch
    Registered Users Posts: 2,384 ✭✭✭


    Hi,

    Ive a Closed Central heating system. Gas Combi type boiler with one of those big red pressure tanks. Anyway the pressure is down to nearly zero and I cannot for the life of me find the input valve/tap where I can connect a hose from the tap to top up the system.

    Anybody got any ideas or is this a job for a plumber?

    Thanks!
    Tagged:


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    #2
    RebelButtMunch
    Registered Users Posts: 2,384 ✭✭✭RebelButtMunch


    actually, there is a header tank,and theres water in it, but it doesnt seem to refill the system. I'll check to make sure its not switched off at a valve somewhere


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    #3
    ART6
    Registered Users Posts: 2,632 ✭✭✭ART6


    Some systems have a non return valve from the tank to the boiler, supposedly to keep the system topped up. Worth lookig for that -- it will likely be in the attic soewhere, close to the tank. If it's stuck shut the system won't fill.


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    #4
    crossmolinalad
    Registered Users Posts: 837 ✭✭✭crossmolinalad


    a closed heating system have not a header tank
    There is a valve between your mains and your boiler to fill your pressured systeem
    Fill to 1.5 max 2.0 bar


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    #5
    RebelButtMunch
    Registered Users Posts: 2,384 ✭✭✭RebelButtMunch


    crossmolinalad wrote: »
    a closed heating system have not a header tank
    There is a valve between your mains and your boiler to fill your pressured systeem
    Fill to 1.5 max 2.0 bar

    Thanks for the tip but I cant find the valve and I suspect that the system was installed by cowboys.


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