Generally, when you check equipment for moisture buildup – you’re bleeding your pressure system and tanks. However, over time, moisture sometimes builds up in your spray foam hose air line. Periodic maintenance of the air line is required.
To safely remove moisture, complete these steps; place a fitting/dump valve into the air line that normally connects to the spray gun, turn on your air system, open the dump valve, then run the system wide open for 15 minutes or until moisture is displaced. These steps should be done in a safe area, suitable to rapid air release.