hi all, new to tis so please bare with me...recently replaced the blank on pressure release valve,far as i no it a common fault and it the second time i done this,,but since doing this the boiler not keeping its pressure, as far as i no there no leaks, any ideas all help welcome thanks
There should be no water coming from pressure relief valve, pressure should be 1.0 - 1.5 bar when cold. When hot the pressure shouldn't rise above 3 bar, combi fill should be dis-connected and blanked.
If you're losing pressure, there's either a leak, the pressure relief valve is passing, the diaphragm in the pressure vessel is split (if pressure rises to above 3 bar, when system hot) or the combi fill is on/passing - overfilling system will open pressure relief valve.
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by manicmag17 » Sun Dec 05, 2010 8:23 am 
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