RYOBI Misting Kits and Accessories are the easiest and most efficient way to provide the cool, comfortable surroundings you want. The RYOBI In-Line Filter helps to protect misting systems by preventing solid sediments from clogging the system. It filters out particles as small as 5-microns. This filter helps to prolong the life of your misting nozzles. This kit along with all other Ryobi Misting Kits and Accessories is designed for outdoor use with cold water only.