In our Hayward Collection we have the Hayward CL100 Inline Chlorinator, Hayward CL200 Inline Chlorinator with 1 1/2" ports, Hayward CL200S Inline Chlorinator with 2" ports, Hayward CL110 Offline Chlorinator, Hayward CL220 Offline Chlorinator and the Hayward CL220 Offline Brominator. The Automatic Chemical feeders are efficient and maintenance free, they are durable, corrosion-proof, and are ideal for new or existing pools or spas and work automatically with your pump and filter system. They use large or small slow dissolve tablets or sticks it also has a dial control valve that lets you control and adjust the rate of feed. They all have an Easy-Lok threaded cover for safe and convenient access to add tablets or sticks, as well as an unique finger-release catch that provides extra security!