- Joined
- 27 Jan 2008
- Messages
- 24,925
- Reaction score
- 2,882
- Location
- Llanfair Caereinion, Nr Welshpool
- Country
Twice now had unwanted thermosyphon, first house it was OK if boiler ran from cold with no pump running, but if the pump ran, once flow started it would not stop, second house a little more complex, two pumps, and one pump could cause water to reverse flow through other circuit, and again once flowing would not stop.
I had not heard of London loop, so was looking at two methods, non return valves, or motorised valves, I went with latter, but not sure that was best option, as also needs two relays, but the advantage of motorised valve is it has a micro switch, but the wiring became complex, and my worry is as I get older, I will likely need to get some one else to repair, so want to keep it as standard as possible.
I had not heard of London loop, so was looking at two methods, non return valves, or motorised valves, I went with latter, but not sure that was best option, as also needs two relays, but the advantage of motorised valve is it has a micro switch, but the wiring became complex, and my worry is as I get older, I will likely need to get some one else to repair, so want to keep it as standard as possible.