I am having a problem with my power rain automatic. My automatic has onboard dryers but as it is drying the other spray nozzles are still dripping water all over the car. I have a blowdown that blows the excess water out of the lines but I still get quite a bit of water dripping on the vehicle. I was thinking I need some type of valve at the lowest point that would open up and let the water gravity drain to the floor to prevent water from coming out of the nozzles as it is drying. I didn't really want to add high pressure solenoid valves to do this. Does anyone know of a dump type valve or a maybe a spring loaded check valve that would open if the pressure drops below like 15 psi that could be used to drain the water. My system runs at 1500 psi so it would have to be a high pressure valve. I would also welcome any other ideas or like to know how other automatics do this.