Quick Disconnects make the mashing and boiling process much easier and much cleaner. With traditional barb fittings, it is very difficult to clean the tubing and pipe fitting during the process. With these quick disconnects, you can quickly remove the tubing and submerge in sanitizer when not in use. MPT disconnect screws into your ball valve and the barb side connects to 1/2″ ID tubing. There are two different color of O-ring, both Red and White are ok.