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    letsdoit231's Avatar
    letsdoit231 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Mar 4, 2015, 12:45 AM
    Boiler problem
    "hello I have a boiler valiant eco tec pro 28 and I have a problem with pressure gage it keeps raising when the heating is on to a 3.7 bar which is prity high, the valve that fills up with water is closed, I have try-ed to restart the boiler and bleed radiator to get to right pressure but it still raising up.
    Anyone can help would be much appreciated many thanks
    massplumber2008's Avatar
    massplumber2008 Posts: 12,832, Reputation: 1212
    Senior Plumbing Expert
    		  
    #2

    Mar 4, 2015, 04:53 AM
    Hi

    It sounds like your heating system EXPANSION TANK is defective and needs to be replaced. Here, when water is heated it expands and in a closed system like your boiler if there is not an expansion tank (or there is a broken tank) to ABSORB the expansion you will see a rise in pressure, especially as the water gets hotter, and in most cases the system will leak out the pressure relief valve.

    Expansion tanks are about $35.00.

    Mark
    DJinNYC's Avatar
    DJinNYC Posts: 1, Reputation: 1
    New Member
    		  
    #3

    Mar 6, 2015, 08:16 PM
    Some expansion tanks, like the one on my boiler, have an air valve to pump air pressure into or to let pressure out, if yours has a valve have you TRIED to relieve some pressure from it?
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