With our pump on 1 everything is fine, if I put it on two, then it
starts to pump over.
The expansion tank is about 2m above the pump and hot water cylinder,
the expansion pipe goes up a further 0.5m or so above the tank to reduce
the problem but...
Why does it happen, what can one do, can one put a constriction in the
expansion pipe to reduce the effect?
- posted 12 years ago