Inslalled new RB DAS-075 Anti-Siphon Valves with new main line. Customer had old valves hooked to hose bib and had a restiction so system would not work. Have 40 psi static and only 20 psi working pressure. Water company says this all they can supply. Gpm is 13. Valves will open manualy. Have power and water to each valve. There are 4 valves and only one will work with the controller. Swapped solenoids and had no luck. Can anyone help. Customer did not have back flow prevention installed. Did not want to spend extra money so I used anti-siphon valves. He did all of the original installaion. Most of his fittings are also blowing apart.