Thanks, I guess the conclusion is rachio does power 3 valves simulatenously. My brief googling indicated otherwise initially but maybe that was gen1 not gen2.
Is there a way to combine common wires inside the rachio panel? Is there a solution that will fit into that enclosure? I m familiar with wire nuts I just dont know if it will fit there.
So i would first get 2xhot and common wires and join them from both master valves. That gives me 2 wires, hot and common. I then bring those 2 new wires to the controller. Now I need to join the master common wire with another existing common wire there. The problem is all common wires are taken thus I need to join them. I can make a small jumper cable and join 3 cables (2 existing common and 1 jumper) and insert it into common. The question is will this fit there inside the panel.
As a side note, is it okay to just run bare 18 awg wire (bare as in individual cables with their insulation but not one of those 18/4 cables with black exterior insulation) from outside to inside?