the pump stays on after the heating has switched off?
grundfos 15/50 pump ?
water is filling the header & expansion tank via the feed pipe to the pump?
grundfos selectric 15-50?
I have hot water overflowing into the loft expansion tank?
Unexplained noises?
water pressure dropping ?
Turn dial which way to increase speed?
grundfos MK 2 15/50 x 18 playing me for a fool?
Grundfos Selectric UPS 15-50 pump?
Can I speed up my grundfos selectric 1550 pump?
The pump appears to be operating when central heating is not on?
how to air out of the central heating pump?
Replacement capacitor?
Problem after changing ch pump on a grundfos pump plan?
grunfos selectric ups 15-50?
is my c/heating pump working?
how can i stop my grundfos pump jamming ?