When I called Newell about my air system last month, they told me that it is a secondary tank for the 12V air compressor that only works the doors and toilets. It does not work with the valid air leveling system or air slide seals. If you turn off your 120V air compressor and flush toilets and open and close air doors, you should hear the 12v compressor kick on within 5 min or so. I do believe they are tied together somehow with the 120V system as when I turn the 120 compressor back on, I can hear the 12v tank fill. On my 12v pump, there is a knob that is supposed to be on 60psi and that controls how fast ur doors close and is the suggested psi to make ur toilets work right.
Then again, since our coaches are 8 years apart, it might be different.
Dave #656
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