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Mend Alpha CD32C Pressure Relief Valve Heating

Alpha boiler CD32C - losing pressure - help!!?

Boiler keeps losing pressure, overnight - no leaks on radiators or damp patches anywhere. Have noticed that water is dripping outside - from the pressure relief valve pipe when the heating is running.
What could be the cause of this?

Andy Smith
December 2010
AlphaAlpha CD32CHeating, Home Heating SystemsPressure Relief Valve Heating
I am having the same problem with my Alpha 28 boiler. I think the problem is a faulty pressure relief vale.

Peeks
February 2011
It's almost certainly a leak from one of the unions of the central heating pipes with the primary heat exchanger. The union is a real weak point, relying on a small o-ring seal and a bendy clip to hold them in place and seal watertight. The o-rings perish over time. They're simple enough to replace.

Olly
February 2011

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