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central heating?

Hi could someone tell me, Do i need to drain my cenral heating system to change a halstead ace diaphgram . thanks
deano 1959, August 2011
thanks, for the information lal.

deano 1959, September 2011
no you can shut heating inlet and out let valves under the boiler also main water inlet valves make sure all
power supply is off drain out water from boiler by opening
overflow pr valve

lal, August 2011
link Click here to see other fixes for Halstead.