Your combination of trades is the best possible IMO - will encourage my son to do something like that if he shows interest.
Hmm a new 28mm NO valve would be about £115. Might be easier to fit something like this to reverse the NO/NC signal. Don't think its a safety critical issue as no valves from boiler to header tank and in any case the boiler would just shut down if there was no flow. Could be wrong though....
Hmm a new 28mm NO valve would be about £115. Might be easier to fit something like this to reverse the NO/NC signal. Don't think its a safety critical issue as no valves from boiler to header tank and in any case the boiler would just shut down if there was no flow. Could be wrong though....