have just installed new open vent HW/CH/solar system. pressure tested and all ok. 28mm pipwork to/from boiler,pump on boiler flow, order is vent then feed then pump, pump (peglar terrier) mounted on a vertical run with vent screw accessed horizontally. ALL IS WORKING WELL....but every day i hear the tell-tale trickle sound coming from the pump, i undo the screw a bit of air splutters out and then it runs silently, but i have to do this every day, there are no leaks, anyone have any ideas of whats going on??
on further investigation after bleeding the pump air gets into it within about 10 mins!!?. when all is off there are no leaks though
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