[Richard and Rhonda]

My leveling valve is leaking. It is located behind the drive wheels in the wheel well. The front one is in the center of the front axle.

Here is a crude logic for determining the likely culprit. Keep in mind the coach air supply goes to the leveling valve first, then through the solenoid, on then on to the bags. That's the circuit when the coach is in ride mode. So.......if you lose air pressure in the coach air guage quickly, but the coach stays level, then it is not likely the solenoid valves that are leaking.
That is what my coach is doing, but only when the coach is high or low in the back. If I have to raise or lower the coach rear, then the leveling valve body will leak like crazy. If I leave the rear level, then it will hold air for hours. Once I set the coach at a given level, it will stay there.
Looking at it another way, to check the solenoid valve leakage, raise the coach above normal height. If it stays up, then your solenoid valves are not leaking very much.

Yep, I would like to have the entire valve. I will gladly pay the shipping.