[johnkosir]

I have 04 steerable tag, with Valid slides so it will be similar but different, I have a 12v and 120v compressor I think you have 2 120v compressors,  between rear axels I have 4 tanks ,front 2 parallel too frame are for air brakes, back 2 running 90 degrees to frame are for house, rear tank gets supplied from 120v compressor and from engine air dryer through a check valve, rear tank goes to front tank through a check valve, Newell says there should be a ball valve, mine never had one.  Rear tank goes too rear 6 pack front 6 pack for leveling,
Front tank gets air from 12v compressor and rear tank Newell calls this one the emergency tank
This one supplies air to the slide seals from the compartment behind my rear wheels. There is a valve in front of the controls which lets me isolate the seals from the rest of the coach, if the check valve is working properly when I shut the valve off I can watch the led pressure sensors and see how long it takes the 4 different seals and the controls for them too leak down.
Bodie air door
3/8 line going to generator air bags
1/4 line front seat, air horn
12 v compressor has a manifold 1 line going to front tank 
pressure regulator supplying toilets and pocket doors
I live in Canada, Newells do not like the cold. I have the cracked mirrors to prove it. My Shop is not big enough for my coach. I have put a ball valve in front of every air line leaving my tanks so I can turn things off ,when checking for air leaks (I like using a bubbler ) and for the winter, being outside fixing air leaks when it is -20 is not fun. I have replumbed my coach so I can have air to just my slide seals, bodie door and front toilet from a separate compressor. I do not use the air tanks, water condenses in them freezes, plugs the drain valve, then plugs the air lines. Don't  ask me how I know.