2 questions for Mark and John regarding this thread:
1. If you have 2 valves in different places at different elevations, is it true that each valve only needs to be higher than the highest sprinkler that it services? I would like to split the supply line and service 2 different areas. Its easier to run electric wire than PVC.
2. any pipe above ground has to be copper, correct? If so, that means the pipe in and out of each valve has to be copper, as well as the suggested union for each valve (at $16+ each). I suppose I could use PVC on the sprinkler-side of the valve and thus use a $5 union for each valve and replace it every (?) years when it fails... Or is it acceptable to run PVC to and from the valve if they are protected from the sun? I've seen it done...
Thanks!