I have an ideal Mexico boiler with gravity hot water and pumped central heating. Recently had TRVs fitted, system drained and refilled with inhibitor by a plumber.
Was in loft at the time the heating came on and a small amount of water came out of the vent pipe ver the small feed and expansion tank in the loft. Only a small spurt which stopped immediately. Have been experimenting and this only happens on switching the heating on, it does not continue.
Is this "pumping over" or is this normal. I've read pumping over is less than ideal, but I'm not sure if his refers to the continuous outflow of water from the vent pipe or the situation I describe.
I've read can be linked to pump speed, this is on 3 - should I turn it down, do nothing or call a plumber, could it possibly be linked to the recent TRVs I had fitted ( I imagine I Previously had a fully open system, now some radiators closed down to TRVs)?
Advice appreciated.
Was in loft at the time the heating came on and a small amount of water came out of the vent pipe ver the small feed and expansion tank in the loft. Only a small spurt which stopped immediately. Have been experimenting and this only happens on switching the heating on, it does not continue.
Is this "pumping over" or is this normal. I've read pumping over is less than ideal, but I'm not sure if his refers to the continuous outflow of water from the vent pipe or the situation I describe.
I've read can be linked to pump speed, this is on 3 - should I turn it down, do nothing or call a plumber, could it possibly be linked to the recent TRVs I had fitted ( I imagine I Previously had a fully open system, now some radiators closed down to TRVs)?
Advice appreciated.