That’s great, thanks, Fred. A good “How To”.
Folks should understand that the standard Exsis water system is an on-demand pump, where the in-tank pump is switched on by the microswitch in the tap. If buying a new tap, it’s important to get one with a built-in microswitch (some taps don’t have them) OR change to a pressurised water system, when microswitches are not needed.
I don’t think the polarity of the switch actually matters, Fred, though it’s good to try to keep the same configuration of wires.
For those interested in converting to a pressurised water system, read my article on Page 286 of Tom’s “Little Exsis Book”.