In-ground Swimming Pool Off-line Chemical Chlorine Feeder Save on chlorine use and regulate your chlorine level effortlessly. Dial adjustment valve controls sanitizer flow. Corrosion-proof. Installs easily into existing filter system. In-Line feeders require PVC plumbing. Off-line feeders tap into the existing PVC Holds as much as 9 lbs large or small, slow dissolving, Trichlor tablets -Dial control valve allows for simple feed rate adjustment Simple installation -Easy-Lok threaded cover for safe access to add tablets Caution: Extreme care must be excised when adding chemicals to your pool. Concentrated chemicals react violently if they mix in the chemical feeder, causing a fire or explosion, which may result in PROPERTY DAMAGE, PERSONAL INJURY or DEATH. Never use any petroleum based lubricants on cover O-Ring. Regular lubrication is necessary to allow for easy cover removal. Use non-petroleum based lubricants such as Jack's No. 327 lube. Warranty - 1 Year