Rainbow Chlorinator Model #300-19 Offline (R171056)

Offline Chlorinator w/19″ Spa Chamber, holds 30 1″ tabs

SKU: R171056
Brand Pentair


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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.

  • Completely enclosed systemsno escaping fumes.
  • Simple, trouble-free designsno special venting required.
  • Top-loading makes it easy to add chemicals. Also available in clear amber for easy tablet viewing.
  • This is an offline chlorine feeder. Easy to install.
  • Owner’s Manual
  • Brochure
Additional information
Weight 5.0 lbs

7 in. x 7 in. 31 in.

Manufacturer Number





Free From material and manufacturer defect



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WARNING: Some products can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm.  For more information go please visit www.p65warnings.ca.gov