There doesnt seem to be any flow controls, not that I can see/find. I can definitely hear water flowing/spraying (at the solenoid) when opened manually on the 3 valves that arent working.
In theory, couldnt I just remove the working diaphram and housing and connect to one that isnt working and open that manually (all others closed), just to see if water is getting to the heads?
I'm really just trying to eliminate the possibility of having more busted PVC (from valve to heads) and having to walk around the yard with a rod, poking into the ground....
Looks like the system was installed in '98, but was used last 2 years ago. Freak Earthquake caused some damage to underground so i'm just trying to eliminate causes.
Thanks.