These are good for catching the water and final filtering air.
Motor Guard: Air Management
I made a coil of 1/2"X 20ft pipe with air fittings on each end. I then just put a regular airline water trap on the outlet. It allows the air to cool enough for the water to drop out and be removed by the separator. Just being air cooled, and possibly the spinning air, works pretty well for getting water out. The coil is small enough and tight enough to fit in a five gallon bucket so if I'm painting I can put it in a bucket and add a couple of bags of ice and top the bucket with water. It then works like a refrigerated separator and makes a regular bowl style water filter very effective.