Curious about two air valves near my front drivers tire, I know the lower one is for my driver side air bag. (The passenger side has its own valve) What could the upper one be for? -the hose goes straight through the floor and disappears under the drivers area carpet. The label only says 90 psi It is a 1987 Establishment on a P30 chassis
I have an air port tied into the coach air brake system to add air in an emergency so you can move the beast. And also..... a separate air port to use for inflating tires, toys etc.. Both are in a compartment just forward of the drivers side wheel.
They are probably for the Firestone weight assist lifts. I had them on a gasoline coach on the rear. They helped on the rear to lift the rear end up. I used 90 lbs of air on each one.
It COULD also be a water pressure tank fill valve to maintain a stable water flow at the faucets and shower. if it is, it should be set to around 25 psi. It should be matched to your pumps pressure to be absolutely correct.
Hopefully the two front air bags (OE equipment) are not tied together. So, perhaps one is for left, one for right air bag.
If tied together, on a corner, the outer bag will not support the weight-- it will just allow the air to go to the inner corner's bag. Heel may be OK for a dog, but not for a motorhome.
