50psi on the tank when empty w 50 psi on the water hose. you fill it at the house until it goes static. the t handle is a threaded plug where i add squirt of soap. also, when i get home and back it in the shed, i just hook up a hose and let it spray for about 10 minutes, then close both valves and it is loaded for the next trip.
i don't have brakes, but for you guys that do, you could plumb this into flush ports.
the beauty of this is you get a pressurized water source to wash off your trailer with no pumps , wires, batteries, etc. and there is not anything to steal at the ramp.
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