I got a call this morning from the Army base. They have a couple of small car washes on base. At one the washes a 2 bay wash and they can’t get any HP Soap or Wax to come out from either of the bays. They have power to the solenoid valves and product to the valves. They E-mailed me a picture of their set up, a pretty simple system, a Cat 310 pump, a couple of inlet water solenoid valves, no water tanks, a zero pressure regulator to lower the water supply pressure and that’s about it. The system is Windtrax BPU-33-310 and is about 7-10 years old, this is the first time they ever had any problems with it. Could the problem be with the zero pressure regulators?