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Pentair Rainbow Model 300 Off-Line Chlorinator

The Rainbow Models 300 automatic chlorine/bromine feeder not only saves time, but also reduces manual handling of chemicals. They use large or small Trichlor or Bromine slow-dissolving tablets to make sanitizing your new or existing pool or spa easy and automatic. It installs easily on the pressure side of the pump, downstream of the filter and heater. The freestanding Model 300 features an external fine control valve that lets you adjust the feed rate to meet specific pool or spa requirements. The Model 300 is ideal for retrofitting existing pools for automatic sanitization. Holds 11 large or 98 small tablets. Treats 12000 to 48000 gallons.

R171016 Pentair Rainbow Model 300 $69.99



  • Completely enclosed system - no escaping fumes or gases.
  • Simple, trouble free designs - no special venting required.
  • Top-loading makes it easy to add chemicals.
  • Rainbow 300 Feeders are NSF Listed
  • 50 PSI maximum operating pressure


  • All swimming pool kits, hot tub spas, saunas, and game tables include free curb-side shipping to most areas
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