Hi
After 20 years the 22mm 3 port motorised valve in my heating system has died. I'm happy to replace it if it's just a matter of remaking the compression fittings and rewiring the new one but I'm not so keen if I have to move any pipework. So my question is, given my current valve is 20 odd years old is a new one likely to have the same physical dimensions regarding the positions of the ports? The one I have fitted is a "superswitch" brand.
Are all 3 port motorised valves the same in operation and wiring?
TIA