I have just put a new blending valve on my combi as the original plumber used this and not a manifold for the under heating in one room only. I can find no leaks but loosing pressure over night and of course the boiler fails. Is there something I have not done ?
I have just put a new blending valve on my combi as the original plumber used this and not a manifold for the under heating in one room only. I can find no leaks but loosing pressure over night and of course the boiler fails. Is there something I have not done ?
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