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Sorry, what is the PPV?Just run a line from the PPV straight to the leveling valve. It just needs to only get air when the wet tank is safely above the pressure protection valve and the leveling valve does the rest for you.
Pressure Protection Valve. It's a little spring loaded diaphragm valve off the side of the wet tank - between the tank and the dryer. It has what looks like a bolt sticking out of the top of it - that's for adjusting the pressure that it withholds from it's downstream port. Usually about 80 to 85 PSI. This prevents anything downstream of that valve from draining the tanks too low for safe brake operation. Thus "protection" valve.Sorry, what is the PPV?![]()