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hi all. can someone please help me!!!!!!!!????? have been to a house whose heating pump needed replacing.When got there sounded as if pump was hunting.Changed pump head 15/50. 2 days later had to go back,heating gurgling bled system called back again drained system refilled + inhibitor,called...

i have a conservatory and have added radiator from one in next room. System runs on 8mm micro bore but now neither rad is getting hot. Flow pipe on existing rad hot but cold through both rads. System runs off vaillant combi. Pressure at 1 bar :?