Just setting up my new 16 station gen 2.
I have two irrigation lines each with there own master valve.
They are a Front zone and a rear zone .these zones also contain zones
Only one zone is on at any one time.
My question is
How do i wire up 2 master valves that operate independently of each other?
I gather putting both wires into the M slot will overload (3 valves on)
and is not an ideal way with both masters on