The Hayward CL200 Inline Automatic Chemical Feeder is a replacement chlorinator for your in-ground pool. The CL200 pool and spa chlorinator is used with 3-inch Trichlor S tablets so that your pool is effectively sanitized and protected. The Hayward CL200 has a dial control valve to adjust how much chlorine is added to your water, and the threaded cover of the Hayward chlorinator makes it easy to add a new table. The chlorinator works from the power of your existing pool pump. This item comes with the fittings and tube needed.