Pentair Rainbow 300 Automatic Off-Line Chlorine/Bromine Feeder

SKU: R171016
300 Feeder
Regular Price: $95.99
Availability: In Stock
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About the Pentair Rainbow 300
Pentair Rainbow Model 300 holds 11 large or 98 small tablets and treats 12000 to 48000 gallons.

Chemical Feeder Features:

  • 300 Series
  • Completely enclosed system - no special venting required
  • No escaping gases
  • Unions not included
  • All Rainbow Feeders are NSF Listed
  • 50 PSI maximum operating pressure
  • Retrofits into exisitng pools or spas
  • Operates on pressure side of pool pump
  • Uses 1/4 feeder hoses, control valve and fittings
  • Holds 11 large or 98 small tablets
  • Treats 12,000 to 48,000 gallons




Great for retrofit projects or equipment pads with limited space, off-line chemical feeders are attached to your equipment with connector hoses and are slightly removed from your other equipment
Flow-through Circulation

Flow-through Circulation

Pentair's chemical feeders are built with flow-through circulation, which results in maximum clean water output


Chemical feeders from Pentair are reliable and highly-efficient, providing automatic sanitization. Using slow-dissolving chlorine or bromine tablets, maintenance is easy and less frequent


Pentair chemical feeders are available in off-line and in-line models. They automatically sanitize residential and commercial pools up to 332,000 gallons and the threaded inlet and outlet fittings make installation easy

More Information

Rainbow Automatic Chlorine/Bromine Feeders high capacity feeders are one of the easiest ways to sanitize large residential and commercial swimming pools using either chlorine or bromine slow dissolve tablets or sticks. These heavy-duty, high capacity feeders provide automatic sanitization for pools up to 332,000 gallons.

Pentair Rainbow 300 Specifications



Product Reviews
Average Rating:
4 average based on 1 reviews
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Kevin said:
verified buyer
Location: Virginia
Better than the Hayward
11 months ago
I ordered this to replace my 1 year old Hayward chlorinator that leaked after 2 weeks. The design of the cover and gasket is much simpler than the Hayward, and I suspect that it will last much longer. My only concern with this product is the adjustable valve. It takes a fair amount of pressure to adjust the dial, and the handle is a bit flimsy. Fortunately, once I get the setting right for my pool, I should not have to adjust it. I have only been using it for a week, but it addresses all of .. more
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