Discuss Central Heating Pump in the Plumbing Forum at Plumbers Forums; Hi,
My Central Heating Pump is not working, how do I no which one to fit 5m or 6m head. just moved in and can't afford a plumber, money is ...
pumps are power rated.
they have to be able to pump up a certain height, and give a certain flow rate.
if you install a more powerfull pump than the instalation requires, water will circulate too fast, and you will have a noisy instalation.
over 1.5 metres a second creates noise.
but that is just one of many calculations you have to make. it gets complicated if your after perfection.
installing a larger pump, use it on less power, setting 1, will give you a longer working life.
bit like using a mini to tow a caravan, might manage a 1000 miles, use a jag and it will do 10000
They do two a 5m and 6m head of around 5.00 differance in price.
and for 5.00 extra it will last longer. but not to sure on this speed thing,Is there a way of working out how fast it should run or if running too fast or too slow.
Are they good or bad. seem cheaper than others i've seen.
If yours is an open vent system, watch out for pumping over the header cistern if the pump is set to high. It usually shows as an outside overflow. If the water is really hot when it pumps over, the loft may be full of water vapour if its cold weather. Don't worry though, usually its enough just to turn the pump down and check the water is getting around everywhere.