The AprilAire 4187 Drain Spud is the plastic fitting that attaches to the base of the housing of a Model 350 or 360 humidifier. It is designed to allow for the connection of a 1/2" O.D. drain hose.
The AprilAire 4187 Drain Spud is the plastic fitting that attaches to the base of the housing of a Model 350 or 360 humidifier. It is designed to allow for the connection of a 1/2" O.D. drain hose.