devb22
+1y
Switchbox to valve wires can be 18 AWG wire. I like using speaker wire because it is paired, so one wire can be used for the fill valve, and one used for the dump valve. If all of your valves are in one place, you can purchase some '9 wire' cable from any car audio shop and run a single cable with 9 wires in it to your vavles.
Dev