how can I fix my old glow worm central heating boiler model 65-80?
pump diagram?
grundfos MK 2 15/50 x 18 playing me for a fool?
Grundfos Alpha+ 25-60 pump problem?
How can reduce the noise made by my Grundfos ups 15-50 pump?
Turn dial which way to increase speed?
baxi 105 HE boiler problem?
grundfos selectric ups 15-50?
Can I speed up my grundfos selectric 1550 pump?
Grundfos UPS 15 45 x18 central heating pump?
water is filling the header & expansion tank via the feed pipe to the pump?
grundfos selectric 15-50?
Hot water from boiler filling expansion tank?
grundfos 15/50 pump ?
I have hot water overflowing into the loft expansion tank?
Grundfos Selectric 15-50 - noisy when on, intermittent banging?
the pump stays on after the heating has switched off?
Problem after changing ch pump on a grundfos pump plan?