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potterton leaks?

I have a potterton performer 28 combi boiler, the pressure keeps dropping and when I open the loop feed tap to build the pressure back up, there is water dripping from a 15mm open pipe underneath the boiler.
thanks for any help
michael ball, February 2010
sounds like the pressure vessel is faulty.
the boiler team.com

the boiler team.com, February 2010
possibily your pressure valve leaking and as it is not taken outside by plumber it is leaking inside. you will need to replace pressure valve

k, February 2010
link Click here to see other fixes for Potterton Performer 28.