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cheers andy will change the valves and see about power flushing the system will get back to you with results thanks norman

if i loosen valve from pipe work water should rush out if not blockage in system system is 10mm flexi pipe whats best way to flush out whole system. norman

yes valves back on, very little air coming out when try to bleed turned of valves when removed rads

yes valves back on, very little aie coming out when try to bleed turned of valves when removed rads

valves are twist to open/close could be 30 years old there are hot and cold water tanks upstairs

removed rads took the outside and flushed the through with a hose pipe the boiler is old not like a combi water pump apears to be working as down stairs rads are hot

my upstairs rads where not warming up i have flushed out rads but there now appears no preasure to push out air. i have a thorn m boiler should there be a valve to increase water presure or does it just work from water pump