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Hi all, Some years ago Grundfos introduced Pump Plan, a two pump heating system with a wiring centre containing a relay, as an alternative to using the zone valves required by S-plan and Y-plan. This product has been discontinued for some time. I can replace the dual-pump with two 15-50s or...

Would appreciate advice please. Our detached garage has power and lighting circuits supplied from the consumer unit in the house. The sockets are connected to a B32 on a 63A 30mA RCCB. The lights are connected to a B20 on another 63A 30mA RCCB. The garage lighting circuit has been extended...

Hi all, some help required please! We've moved and inherited an oil-fired heating system with two pumps (CH and DHW) but no zone valves. There is a cylinder stat but no room stat, so we would like to install a wireless room stat. But I've not come across a two pump system before (although I...

Hi all, Would very much appreciate some help here. We've moved to a new property that has a Grant Euroflame 70/90 oil-fired boiler and a Sangamo Choice PR2 two-channel programmer with cylinder stat but no room stat. The Sangamo has a standard backplate with a black wire for HW=ON (t3) and a grey...