[Bob]

The reason aux compressors get a bad rap is because they do not introduce air through a dryer like the engine driven compressor does. So as an attempt to minimize moisture the converters or Prevost use a water trap which has to be drained often. Usually it is not drained and the result is water migrating through the system.

[Archived]

A good addition to the aux compressor is an auto spitter, purges automatically every time the compressor shuts off. Not very pricey. Geo.