[77newell]

Be aware that the 120VAC compressor also supplies air to everything in the uses air, such as air seats, stair slide, generator slide, pocket doors, etc that is used by the house. If you have some of these uses then you should also have a couple quarter turn valves on the bulkhead ahead of the rear axle. One valve supplies the suspension system and the other supplies all the other house uses. By closing them both and watching the pressure drops on the gauge at the rear 6-pack, or whatever you have for managing the leveling you will be ascertain the suspension leakage rate. By watching the dash gauge you can determine the leakage rate in the house uses.

I don't know if you have this combo but if you do it's mighty handy.