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Mend Worcester SiII Relief Valve Hot Water

siII series worcester?

hi
when my hot water is running. or the heating is switched on the preassure goes up and water comes out of my overflow. i have to turn the releif valve to get preassure back down. this is getting a daily acurance. what is wrong?

tony
August 2008

Worcester Worcester SiII Heating, Home Heating Systems Worcester Relief Valve Hot Water

Either, the filling loop is not completely closed water mains water is entering the central heating, or the expansion tank needs re-pressurising. I posted a detailed "how to do this" yesterday, have a look for"optima 701 pressure rises"
not sure if the links works but it should be on
http://www.howtomendit.com/answers.php?id=163192

LTGF
August 2008

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Worcester SiII Boiler Overflow - Help & Advice