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Mend Sime Combi Boiler Overflow Pipe

sime combi boiler?

how do i stop the overflow pipe outside from dripping which is connected some how to the sime combi boiler

appendix
July 2009
SimeSime Combi BoilerHeating, Convector HeatersBoiler Overflow Pipe
replace the expansion vessel

johno
July 2009
from past experience this is caused by one of two things 1. first that the pressure relief valve is sticking open due to lime scale build up .2.the water feed loop that charges the system is leaking into the system and the pressue gauge is rising above 4 bar and letting water out through the valve

ash
July 2009

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Sime Combi Boiler Overflow - Dripping Pipe Fix