Product Overview

The Pentair Rainbow 300-29X Off-Line Automatic Chlorine/Bromine Tablet Feeder R171070 is a high-capacity chemical feeder designed to provide controlled chlorine or bromine tablet dispensing for pool and spa sanitation systems. This off-line feeder connects to the pool plumbing using tubing and fittings, allowing sanitizer to be introduced into the circulation system without installing the feeder directly in the main plumbing line.

The Rainbow 300-29X is commonly used for commercial, residential, and high-demand pool applications where larger tablet capacity and adjustable chemical feed control are needed. It is designed for use with compatible trichlor chlorine tablets or bromine tablets, helping maintain sanitizer levels more consistently than manual tablet dosing.

With its high-capacity chamber, off-line installation style, and adjustable control valve, the Pentair R171070 is a practical solution for pool professionals and facility operators who need dependable tablet chemical feeding.

Ideal For

Commercial swimming pools

Residential pools with higher sanitizer demand

Spas and hot tubs with compatible chemical systems

Apartment, HOA, hotel, and facility pools

Off-line chemical feeder installations

Chlorine tablet feeding

Bromine tablet feeding

Replacing older Rainbow 300-29X feeders

Pool service professionals and maintenance teams

Key Features

Off-Line Feeder Design: The off-line design connects to the pool plumbing using tubing and fittings, making it a useful option where an in-line feeder is not practical or where a remote feeder setup is preferred.

Chlorine or Bromine Tablet Compatibility: Designed for use with compatible chlorine or bromine tablets. Do not mix chlorine and bromine products in the same feeder.

High-Capacity Chamber: The 300-29X model is built for larger sanitizer capacity, reducing how often tablets need to be added compared with smaller feeders.

Adjustable Feed Control: The control valve allows the sanitizer feed rate to be adjusted based on pool size, water flow, and sanitizer demand.

Commercial and Residential Use: Suitable for many commercial and residential pool applications when properly sized and installed.

Rainbow Series Reliability: Part of Pentair’s Rainbow chemical feeder lineup, commonly used by pool professionals for controlled tablet sanitation.

Service-Friendly Design: The feeder lid and chamber design allow access for tablet loading and routine maintenance.

Benefits

The Pentair Rainbow 300-29X R171070 helps simplify pool sanitation by automatically dispensing chlorine or bromine tablets into the circulation system. Instead of manually adding tablets to the pool or skimmer, this feeder provides a controlled chemical feed point that supports more consistent sanitizer management.

Its off-line design offers installation flexibility, while the high-capacity chamber makes it useful for larger pools or higher-demand systems. For pool operators and service professionals, this feeder can help reduce maintenance frequency, improve sanitizer consistency, and support cleaner pool water when used with proper water testing and chemical balance.

Specifications

Warranty & Compatibility

Important Compatibility Notes

This feeder is designed for compatible trichlor chlorine tablets or bromine tablets. Never mix chlorine and bromine in the same feeder, and never use calcium hypochlorite or other incompatible chemicals in this unit.

This is an off-line feeder, meaning it uses tubing and fittings to connect to the plumbing system rather than being installed directly in the main pipe run. Always confirm plumbing layout, tubing size, flow requirements, chemical compatibility, and installation instructions before ordering.

Chemical feeders should be installed and serviced by a qualified pool professional. Always follow chemical manufacturer instructions, use proper personal protective equipment, and maintain correct pool water balance.

Customer-Facing Q&A

Q: What is this feeder used for?
A: This feeder automatically dispenses chlorine or bromine tablets into the pool or spa circulation system.

Q: Is this an in-line or off-line feeder?
A: This is an off-line feeder, which connects to the plumbing using tubing and fittings.

Q: Can I use chlorine tablets in this feeder?
A: Yes. It is designed for compatible trichlor chlorine tablets.

Q: Can I use bromine tablets in this feeder?
A: Yes. Bromine tablets may be used, but chlorine and bromine should never be mixed in the same feeder.

Q: Can I use calcium hypochlorite tablets?
A: No. Calcium hypochlorite should not be used in this feeder.

Q: How many tablets does it hold?
A: The 300-29X model can hold up to approximately 29 large tablets or 237 small tablets, depending on tablet size.

Q: Does this include tubing and fittings?
A: This model is commonly supplied with tubing, control valve, and plumbing connection components, but package contents should be confirmed before installation.

Q: Does this require professional installation?
A: Professional installation is recommended to ensure correct plumbing, chemical feed setup, and safe operation.