The Hayward Aqua Trol HP Salt Chlorine Generator System (W3AQ-TROL-HP) is designed for inground or above ground pools up to 18,000 gallons. It features a patented Turbo Cell for maximum efficiency, quick 30-minute installation, and a 24-hour timer to control the filter pump. The system provides the best water quality, keeping your pool crystal clear and silky smooth, while preventing red eyes and dry skin. A digital salt display and seven diagnostic indicators make it easy to monitor, and the system includes a selectable super chlorinate function for added convenience. With automatic self-cleaning technology and a durable build, the W3AQ-TROL-HP model is UL and CUL listed and comes with a 2-year manufacturers warranty.