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Home Pool Swimming Pool Chemical Feeders Rainbow Chlorine & Bromine Feeders Pentair Rainbow 300 Automatic Off-Line Chlorine Feeder | R171016
NOTICE: The pool & spa industry continues to face industry-wide shortages on many products that most vendors expect to last late into mid-2022. We're allowing items to be purchased so that customers who choose to wait will have their order shipped when product is available. WE WILL EMAIL YOU RIGHT AWAY IF YOUR ITEM IS BACKORDERED. 

Pentair Rainbow 300 Automatic Off-Line Chlorine Feeder | R171016

Pentair Rainbow 300 Automatic Off-Line Chlorine Feeder | R171016

Shipping Flat Rate Shipping $9.95
Parts AvailableParts Available
Platinum Preferred Manufacturer
  • 300 and 320 series filters available in clear amber for easy tablet level monitoring
  • Completely enclosed system - no special venting required. No escaping gases.
  • All Rainbow Feeders are NSF Listed
  • 50 PSI maximum operating pressure
Purchase Options
  • Pentair Rainbow 300 Chlorinator Parts Bag | R172064
    Pentair Rainbow 300 Chlorinator Parts Bag | R172064

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.
300 Series. Retrofits into existing pools or spas. Operates on pressure side of pump. Uses 1/4 in. feeder hoses, control valve and fittings.
Holds 11 large or 98 small tablets. Treats 12000 to 48000 gallons.

Brand: Pentair
Q & A
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Browse 6 questions Browse 6 questions and 12 answers
Which is the inlet port? Side or bottom?
Jack M on Feb 20, 2019
What is the difference between 300 and 300c?
A shopper on May 18, 2021
Does the unit come with the hose and connectors needed to hook it up?.
Cecil B on Jul 18, 2021
BEST ANSWER: Yes - all hoses and connectors you need to get it going. You still need to drill the holes if they aren't there already. Also, you'll need the anchor bolts to mount it to the cement.
does this unit come with the regulator (dial that controls amount of chlorine dispensed)?
A shopper on May 12, 2017
BEST ANSWER: Yes, the black thing you see toward the bottom on the photo is where the dial is. It also came with the tubing to connect for water to flow into the chlorinator and out into the filter/return to pool. The gasket was also included that fits inside the lid.
what would cause a water leak coming from the top of this unit?
A shopper on Jul 17, 2016
BEST ANSWER: I always keep a spare o-ring on hand. We have had them just wear over years, and we've had one get caught in the threads when replacing the lid. Once there is a crushed or flat spot, it will leak. Fortunately, they are inexpensive and easy to replace. Just put a light coat of silicone lubricant, and it should stop the leak.
I need hoses for the Pentair 300 Chlorine Feeder. Where do I get them?
A shopper on Apr 1, 2019
BEST ANSWER: The part you are looking for will be attached to this answer.
Pentair .375"X .25" Tubing 8' | R172023 R172023Z
Pentair .375"X .25" Tubing 8' | R172023 R172023Z
4.5 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 4 out of 5
Install it, fill with tabs, set the dial and forget about it - perfect!
May 9, 2014
Rated 5 out of 5
Works great and at a fair price.
Easy to install and regulates my chlorine perfectly.
July 18, 2021
8 months ago
Adobe Acrobat PDF Brochure
Adobe Acrobat PDF Owners Manual

Register your Pentair product online at www.pentair.com.

You've always been able to count on the quality and long service life of Pentair products. Pentair uses state of the art workmanship, materials and manufacturing processes to create the most innovative pool and spa equipment anywhere. And now Pentair products can deliver even more value and peace of mind, because Pentair offers extended warranty coverage on select products that are installed by a qualified installer*.
While the majority of Pentair products are covered by a sixty- (60) day warranty, a select number of products qualify for extended warranty coverage.
Select Bundled Products: applies to purchases and qualified installation of a minimum of a pump and filter, and one or more of the following: heaters, heat pumps, control systems, automatic cleaners, lighting, salt chlorine generators or UV sterilizer**
*Note: Qualified Installer - Defined as a licensed professional who charges a fee for his services, and possesses a business license, contractor's license and/or resale permit. Common examples of a "qualified installer" include: Swimming Pool, Home Repair or Landscape Professional; Plumber or Electrician; General Contractor; Heating and Air Conditioning Specialist.
**Note: Bundled products - must be purchased on the same invoice and installed at the same time. If any product within a bundle is ineligible for the bundled warranty coverage then all products within the same bundle will be disqualified from receiving the three (3) year extended warranty coverage for bundled products.
TradeGrade products must be purchased from a retail store (brick & mortar), pool builder or pool service company to receive a one-year, two-year or three-year warranty. If purchased online will only receive a sixty-day limited warranty. View the list of TradeGrade Products.
Ecommerce (EC) products: Products purchased from an Authorized Pentair Online Reseller (products beginning with EC-) receive a one (1) year (parts only) warranty from the date of purchase. The exceptions are: IntelliChlor cells and IntelliFlo SVRS pumps which receive a two (2) year warranty. EC products are not eligible for the bundled three (3) year extended warranty.
Visit www.pentair.com to submit your product warranty registration.
This information was updated on 11/19/2021. For the most current information and full warranty policy please visit www.pentair.com/warranty.

 Adobe Acrobat PDF Warranty Information
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Pool Supply Unlimited is an e-commerce company that loves water. We love to pump it, filter it, heat it, chlorinate it, light it up and stare at it while we're barbequing a fat, juicy steak. There are real pool professionals working here. Our guys have seen thousands of pools in their careers, no exaggeration. We are based in Southern California and can land most products to your door (within the 48 contiguous states) in less than a week.
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