water is filling the header & expansion tank via the feed pipe to the pump?
grundfos MK 2 15/50 x 18 playing me for a fool?
Grundfos Selectric UPS 15-50 pump?
Problem after changing ch pump on a grundfos pump plan?
how can i stop my grundfos pump jamming ?
how to air out of the central heating pump?
The pump appears to be operating when central heating is not on?
Grundfos Pump Plan wiring Centre part 96437234?
grundfos selectric 15-50?
Can I speed up my grundfos selectric 1550 pump?
Grundfos UPS 15 Circulation Pump Fault?
Unexplained noises?
Can I stop the start-up noise from my Grundfos UPS 15-50?
my grundfix selectric wont stop pumping?
Grundfos Selectric 15-50 - noisy when on, intermittent banging?
grundfos selectric ups 15-50?
water pressure dropping ?
the pump stays on after the heating has switched off?
grunfos selectric ups 15-50?
Problem refilling CH system after fitting Grundfos 15-50 130 selectric pum?
I have hot water overflowing into the loft expansion tank?