The Hayward Aqua-Rite 940 Turbo Cell from Hayward’s Expert Line is a replacement cell compatible with most Hayward Salt Systems including the industry’s most popular T-15 Salt System. Salt Cells accumulate calcium and build up on the plates overtime slowing down the generation process. We recommend cleaning your salt cell at least once per season using Cell Cleaner so the cell can produce chlorine efficiently. Overtime the cell will slowly wear down eventually stopping the generation process whereby a new replacement salt cell is needed. A salt cell’s life is about 3-7 years depending on the kind of salt cell you have and importantly, how you manage your water chemistry. The Hayward Aqua-Rite 940 Turbo Cell from Hayward’s Expert Line has an average lifespan of 5-7 years in 40,000-gallon pools and is engineered to produce 720 lbs / 330 kg of pure chlorine during that time. That means it will give you 25% more chlorine than the Hayward Aqua-Rite T-15 Turbo Cell and it has 4 years of additional warranty so you know your salt cell will be reliable for many years to come. Includes a 15’ cable, salt cell unions sold separately.