Friday, August 16th 2013, 3:48am Sprinkler system I have 9 zones in system with rain bird valves. All valves in first valve box work fine which is 4 zones. The 2nd box I have 5 zones, I only have half pressure in these valves. The two boxes are connected by 6 inches. I have plenty of pressure from back flow device to valve boxes 55 lbs. No line interference (no roots) plenty of power going to valves from control panel (2 3 zones are pop up with 8 heads and two with 4 gear driven heads. These hea...
