Automatic Inline Chlorine Feeders




Inline Installation



Water Features


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Automatic Chlorine/Bromine Feeders

Rainbow Automatic Inline Chlorine Feeders is the efficient, easy way to sanitize your pool or spa.


The Rainbow™ models 300 and 320 automatic chlorine/bromine feeders not only save time, but also reduce 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. Both install easily on the pressure side of the pump, downstream of the filter and heater.


The freestanding Model 300 and the in-line Model 320 both feature an external fine control valve that lets you adjust the feed rate to meet specific pool or spa requirements. The 300 is ideal for retrofitting existing pools for automatic sanitization. The 320 is designed for permanent installation in the return line of new or existing systems, and dispenses sanitizer directly into your pool or spa, downstream of all equipment.


Years of customer use and satisfaction have proven the Rainbow feeders to be the performance leader in pool & spa chemical dispensers.


Feeder extensions increase tablet or stick capacity so you can vacation without worrying about running out of chlorine.


Featured Highlights


  • Completely enclosed systems—no escaping fumes.
  • Simple, trouble free designs—no special venting required.
  • Top-loading makes it easy to add chemicals.
  • Also available in clear amber for easy tablet viewing.
  • All Rainbow Feeders are NSF Listed


  • In-Line Feeders 320 Series holds 11 large slow dissolving tablets.
  • Treats 18,000 to 70,000 gallons top feed.
  • For permanent installation in return line of new or existing pools or spas. Installs in return line on pressure side of pump downstream of all equipment. Standard with 2 in. slip PVC fittings and adapters for 1 1/2 in.


Treats 18,000 to 70,000 gallons top feed.

Updated: 24 Oct 2022

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