Efficient and maintenance-free, this durable corrosion-proof automatic chlorinators are ideal for new or existing pools or spas and work automatically with your pump and filter system. This automatic off-line chemical feeder is completely enclosed therefore there are no escaping fumes and it doesn't require any special venting. The easy-to-use integral dial control valve lets you accurately adjust the rate of chlorinating needed to keep your pool and spa sanitized. Off-line chlorinators are especially important when there is no room to plumb an in-line chlorinator properly or conveniently and they are easily installed.Details:Off-line chemical feeder 4.2lb tablet capacity For use with 3" slow dissolving chlorine tablets Dial control valve lets you control and adjust the rate of feed Threaded cover for safe and convenient access to add tablets Corrosion resistant construction for long lasting lifeNo special venting required Fits off-line to most PVC Simple and easy installation Pressure gauge up to 50 PSI Max output: 32lbs/hr