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if you take the plastic knob off the valve there should be a small nut with a hole in it that the valve shaft comes up through. under the nut there should be some sort of material that will compress when the nut is tightened,sealing the shaft and stopping any water coming up from the valve...

Hi Bamber,thanks for the reply.two rads were removed and washed manually by me, and neither of these gets warm at all. the flush was done today,through a flow and return and this rad doesnt get hot. No previous visit for sludge remover. i thought of a blockage some where but dont know where.the...

apologies if this has been asked before, i have found similar probs but not quite the same. i have a open vented mini bore system,two zone valves, grunfoss 15/60 pump and a baxi boiler with cast iron heat exchanger, about 15 years old.the system has been power flushed very recently, the zone...

hi guys,just found this site.What a great site,lots of good advice.sorted my little prob.hot water ,no ch.STUCK ZONE VALVE :cry: