The Professional CL220 Kit for a new pool purification experience. The kit includes the CL220 Offline Automatic Pool Chlorinator, PVC hose, clamps, gaskets, Teflon tape, and check valve control valve in one package.The CL220 Chlorinator features a superior design with an Easy-Lok threaded cap with a finger-release button on the top for secure and easy placement of chlorine tablets, and a 360° omni-directional control knob on the bottom of the side to regulate the speed of water in and out of the pool. The CL220 works by adding chlorine tablets to purify the pool water based on the differential pressure of the system, which pumps the water, treats the chlorine and automatically adds it to the pool. Moreover, the CL220 chlorinator is easy to install, just install the hose in the kit to the old or new equipment, you can easily purify the pool, bringing you the ultimate pool experience.