I did some reading on some of the links and the Online Store. When I looked at the double check valves for sale on Sprinklerwarehouse.com it says that terrain need not be considered and can be placed underground. Does that mean that a double check valve can be place at house 5 feet lower than the highest head? If so, is there significant loss of pressure with double check valve?
I am helping my brother install a system. His front yard slopes uphill from his house. The road is elevated about 5 feet higher than what he wants his Pressure Vaccuum Breaker to be at the house. We thought of putting one anti-siphon valve up by the road to supply those higher heads, and using regular valves for the rest of the zones. Does this sound reasonable or do you have any other suggestions?
