After an exhaustive search I discovered why my pressurized water sytem was not delivering any water to my fauscets, the jabsco 1/2 high pressure valve located 3 inches from the manifold and before the electric pump and accummilator tank was completely clogged. I am wondering if I even need a high presure valve. I do not hook up pressurized city water to my boat at the marina. I have a regular check valve with screen before the pump. Would appreciate to hear from others.