[encantotom]

if it is the same as several of the newells i have had, that is the head pressure release on the compressors. when the compressor shuts off, then it releases the pressure going to the compressor so it can start up next time (at full pressure, the compressor will not have enough force to start pumping) and at the same time uses that to blow moisture out of the dryer bowl at the compressor. that either goes to a small tank like an overflow tank or directly under the coach.

my two cents worth.

tom