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pressure is rising, but feed to boiler is not passing?

the pressure is rising in the boiler but the feed is not passing. when it goes to three bar it is blowing off.

ian
October 2008
Heating, Home Heating SystemsPressure Three Blowing
Sounds like no air in the pressure vessel, you need to repressurise with a foot pump when the boiler is drained

meheatandplumb@aol.com
October 2008

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