On the diesel pusher, you have air brakes, which means you have an air drier. It will put you onto the side of the road if you don't keep it serviced. It's a simple dessicant filter change every two or three years.
Jim & Kate
2016 Creekside 23RKS, 2014 Ram 1500 Eco Diesel
1995 Monaco Dynasty 36', 2005 Honda Pilot