This salt water chlorinator system targets larger in-ground pool owners—up to 25,000 gal capacity, enough chlorine headroom for pools with attached spas, wide lap lanes, or extended family-gathering flow during peak summer. Up to 1.01 lbs / day (19.1 g / h) output keeps the water sanitized during hot-month bather loads when chlorine tablets would be burning through your budget. Drop-in compatibility with Hayward W3T-Cell-9 (T9) in AquaRite, AquaRite Pro, SwimPure Plus, AquaPlus, ProLogic, and OmniLogic automation systems means no plumbing changes and no reprogramming—just swap the cell (note: host-system software must be r1.5 or higher; press the diagnostics button seven times to check current version). Setup takes about 10 minutes: connect pipes per the included instructions, insert the controller, seat the O-rings, done. Every 3 months, a quick cleaning with the included pipe-cleaning tool keeps plate output at spec. Advanced electrolytic technology converts dissolved salt into sanitizing chlorine on demand—no more buying, hauling, or storing chlorine tablets or shock, and gentler on eyes, skin, hair, and swimsuit colors. The system also helps balance pH and hardness. Titanium metal electrodes inside an ABS shell resist corrosion through multiple seasons. 15 ft / 4.6 m power cord; dimensions 13.3 x 4.3 x 5.0 in / 339 x 109 x 128 mm; net 4.2 lbs / 1.9 kg; in-ground pools; model 89420005.