5/12/2015 5:05 AM
Check all your hoses and make sure you don't have any that are collapsing under pressure. Check your o-rings at the hose disconnects, I add dielectric grease to help seal. I had a similar issue and parked my unit with water overnight and came in to find a very small amount of water on the floor under the air diaphragm. Re-sealed that and it was fine, and was also pulling a little air from the fittings too. The smallest leak will cause you problems and you may not even see it leaking water. I was just lucky in parking inside full and walking up on it early in the morning before it was moved. Not sure if that unit has the relief valve in the tank like the 5700, but had a pressure issue and it was the valve inside the tank. It would drop psi then work fine, and finally dropped and wouldn't come back. I check inside the tank and noticed a continuous flow returning right back into the tank. Changed out the valve and problem solved. Hope this helps.
Regards,