[tuga]

Dave,

My 12v air pump operates my air toilets, air pocket doors, and my air seals on the 2 slides. The way it was explained to me by Mike Ellis @ Newell: the 120v auxillary air pump will provide air to everything in the coach. So the 120v air pump can back up the 12v pump, but the 12v pump can not back up the 120v pump.

It makes sense because the 12v pump couldn't provide enough air to the leveling system to raise the coach. But it can provide enough air to flush toilets, open and close pocket doors, and keep the air seals inflated.

Again, my coach is a 1999. Looks like the 2003 Newells are a little different.