Check this out. I installed a 5 zone system using 5 DV 100's (Rainbird) slip X Slip. Zone 2 would not spray until I manually opened the valve and then slowly closed the bleed screw. All wiring is correct. I cross checked the solenoid with zone 1 and zone 1 worked fine. I even swapped the diaphram from 2 to 1 and zone 1 worked fine. Once zone 2 would open, it would stay open even after the controller cycled to the next zone. Ultimately I had to cut out the valve and replace it. Spent way too much time messing with it and still don't know what gives. I definetly didn't want to cut out a new valve either. Have any of you seen this problem before? And what valves do you prefer?