This Universal Solenoid can replace common units. The UHS24 will soon become an essential truck stock item. All appropriate fittings are included in the kit with a universal bracket. Flow can easily be reversed by removing two screws, turning the solenoid 180 degrees, and replacing the screws. 2 ¼” compression, 1 5/16” compression, and 1 barb fitting included to cover Aprilaire, Honeywell, General, Skuttle.