Your compressed air system likely has at least one automatic drain. Whether it’s located internally on an air dryer or mounted externally on the bottom of your air tanks, they need to be attended to! Most come with strainers to keep debris like rust and dirt from clogging up the small orifaces in the solenoid valve. If the strainer is doing its job, it will eventually need to be removed and cleaned. Otherwise, it will clog up and not allow air and water to pass through to the solenoid to be drained. This is exactly what happened to this auto drain that was internally mounted in this air dryer at a collision shop in Revere, MA.