RYOBI Misting Kits and Accessories are the easiest and most efficient way to provide the cool, comfortable surroundings you want. The RYOBI 3/8 in. Brass Drain Valve helps to drain water from your misting system when it is not in use which can help to prolong the life of your misting system. The valve can fasten into any 10/24 threaded misting nozzle opening (like those used in the Ryobi Misting Products) or inserts into any slip lock connector for use. The drain valve works best when used in low points of the line to allow water to drain out and prevent clogging when the misting system is not in use. This valve is made from high quality brass construction. This item along with all other Ryobi Misting Kits and Accessories is designed for outdoor use with cold water only.