Pentair | R171016 | Rainbow 300 Off‑Line Automatic Chlorine/Bromine Feeder

Automate pool and spa sanitization with the Pentair Rainbow 300 (R171016) off‑line feeder. This enclosed system holds up to 11 large or 98 small chlorine/bromine tablets, installs without venting, and delivers reliable chemical control using the pump’s pressure side.

Key Features:

• Holds 11 large (3") or 98 small (1") chlorine or bromine tablets

• Ideal for treating pools/spas from approximately 12,000 to 48,000 gallons 

• Completely enclosed design eliminates escaping fumes and requires no special venting 

• Features an external fine-control valve and includes check valve, hoses, and fittings for precise dosing and installation 

• Operates on the pressure side of the pool pump using ¼" feeder hoses and included hardware 

• Rated for up to 50 PSI maximum operating pressure 

• Compact dimensions (approx. 21 in. H × 7 in. W × 12 in. D) with ~22¼ in. clearance needed for lid removal

• NSF-listed for chlorine use in residential and public applications 

Product Overview:
The Pentair Rainbow 300 feeder (R171016) delivers consistent, controlled sanitation for pools and spas with minimal effort. Its enclosed off‑line design ensures safe chemical handling—no odors or backside venting needed. The generous tablet capacity and fine-tune control valve allow for extended maintenance intervals and precise dosing. Supplied with all required tubing, valves, and fittings, this feeder integrates seamlessly into existing pressure-side plumbing. Made to last and NSF-certified, the Rainbow 300 is a dependable, user-friendly solution for automated chlorine/bromine delivery.