I attached a drawing (hopefully it’s visible). Essentially I expanded my sprinkler system as my yard has evolved. The supply lines to the front are PEX so they are better rated to have pressure all the way. The supply lines to my side yard are Poly (which my understanding is not “supply rated”) so I put a valve in front of it to “protect” it.
Depending on how troublesome the relay solution is I may just see if I can return the Rachio. As I see it, I lost a major functionality of my previous [OpenSprinkler] where I thought this would be an upgrade.
Appreciate the help and curious how much time and cost is involved to put a relay.