grunfoss pump

Our previous shower pump (Stuart Turner) worked perfectly for around 10 years and then we had problems with starting it. On checking out the old pump I realized that the installation provided for insufficient water-head. So we have re-jigged the pluming to place a brand new twin 3bar pump by...

I have a back boiler in lounge then in airing cupboard a water tank & time clock & pump, over night the heating didn't click off & when I turned it & hot water to off this morning the pump still runs & the water is very hot . I turned it off at plug a few times but it just starts up again I've...