Sani King Spa Feeder Model 740 In-line bromine feeder for spas and hot tubs : Accurate and Automatic The Sani King Spa Feeder is the only automatic chemical feeder designed especially for spas and hot tubs. The Sani King Spa Feeder responds to the conditions of your spa. You set it once - then forget it! Adjustable The calibrations on the Sani King Spa Feeder make it possible to use on virtually any size spa - from 80 to 700 gallons. With a simple twist of the cap, you set the feeder to release precisely the right amount of bromine for your size spa or hot tub. Easy to Use You never have to mix or measure. Just add bromine sticks or tablets to the chamber. Sani King Spa Feeder also has a self-sealing valve. When you remove the cap to add chemical, it automatically reduces water flow. This makes it ideal for use on portable spas and hot tubs. Easy to Install and Maintain Installation takes only minutes. Simply cut the return line and cement the housing in place. Add bromine and you're ready for operation! Should you ever need to replace a part all you'll need is a screwdriver. A half-turn will open the basket and allow you to remove and replace any parts in need of replacement without disrupting your entire spa