[Richard]

For those following this thread, here’s some additional info to consider.

Newell followed conventional bus strategy from the 70s and 80s when they welded ping tanks as an integral part of the frame. The idea is that the extra volume of the tank softens the spring rate of the airbag. That softening is highly dependent on the quick flow of air between the air bag and ping tank. Hence the 1 inch diameter transfer hose between the tank and the bag.

But………when the air bags with the i inch inlet went out of production, the alternative has a much smaller inlet. This essentially negates the quick air flow in and out of the ping tank.

As the new bags with smaller inlets are used, there is NO ride quality advantage in retaining the ping tank. There is a slight installation advantage as outlined above. The disadvantage of retaining the ping tank are twofold. One, sometimes the leak is in the tank. Two, all the tank now does is slow the time to raise or lower the coach. It is not very difficult to run a completely new air line from the six pack directly to the air bags.