Hi, I am new to all this so most likely I have no clue what I am talking about. I have a sprinkler systems with three zones that has worked OK since I moved into this house. The zones were turning on one at a time and shutting off correctly. I have a timer mechanism with a big round orange disk and an a switch with three positions: Auto Off Manual The problem is that in both manual and auto all three zones turn on at the same time. From the research I've done it seems that the valve is a Richdel...
