i have a glow worm 30ci boiler that i have to top up every morning & the water has always been leaking out of the overflow, its now got that bad i cant even fill up the boiler as its coming straight out the overflow, why is this
hi. the pressure relief valve has opened and not shutting. will require checking as well as the expansion vessel in the boiler as this causes the prv to activate .
superplumber
December 2010
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