--- product_id: 5000720 title: "Pentair R171218 Rainbow 320C Automatic in-Line Chlorine/Bromine Feeder for Pool and Spa - Amber Body" brand: "pentair" price: "285.83 DT" currency: TND in_stock: false reviews_count: 5 url: https://www.desertcart.tn/products/5000720-pentair-r171218-rainbow-320c-automatic-in-line-chlorine-bromine-feeder store_origin: TN region: Tunisia --- # In-line installation for seamless flow Secure, durable amber body Automatic chemical dosing Pentair R171218 Rainbow 320C Automatic in-Line Chlorine/Bromine Feeder for Pool and Spa - Amber Body **Brand:** pentair **Price:** 285.83 DT **Availability:** ❌ Out of Stock ## Summary > 💧 Keep your pool pristine with hands-free precision! ## Quick Answers - **What is this?** Pentair R171218 Rainbow 320C Automatic in-Line Chlorine/Bromine Feeder for Pool and Spa - Amber Body by pentair - **How much does it cost?** 285.83 DT with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/5000720-pentair-r171218-rainbow-320c-automatic-in-line-chlorine-bromine-feeder) ## Best For - pentair enthusiasts ## Why This Product - Trusted pentair brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Easy Installation:** Clear instructions and compatible with most pool systems for quick setup - • **Durable Amber Body:** Resists UV damage and chemical corrosion for long-lasting performance - • **Effortless Pool Care:** Automates chlorine/bromine feeding for consistent water quality - • **Seamless Integration:** In-line design fits directly into your pool’s return line - • **Precision Flow Control:** Ensures optimal chemical distribution without manual intervention ## Overview The Pentair R171218 Rainbow 320C is an automatic in-line chlorine/bromine feeder designed to maintain balanced pool and spa water chemistry. Featuring a durable amber body resistant to UV and chemical wear, it installs directly into the return line for seamless, consistent chemical dosing, reducing manual maintenance and ensuring crystal-clear water. ## Description This Rainbow 320 automatic chlorine/bromine in-line pool and spa feeder holds 11 large or 98 small bromine or slow dissolving trichlor tablets. Treats 6500 to 27000 gallons in a bottom feed configuration and 18000 to 70000 gallons in a top feed configuration with see-through amber body. Installs in return line on pressure side of pump downstream of all equipment. Standard with 2-inch slip PVC fittings and adapters for 1-1/2-inch. Completely enclosed system, no special venting required. No escaping gases. NSF listed and 50 PSI maximum operating pressure. Measures 17-1/2-inch length by 21-inch height by 20-inch width. ## Features - Installation Instructions: Ensure the chemical feeder is compatible with your pool equipment. - Prepare the chemical feeder and plumbing. - Cut and connect the pool's return line, then install the couplings to extend the pipes for the feeder. - Secure the chemical feeder by attaching it to the return lines, following the flow direction. - Please reference additional installation instructions in the owner's manual in the Guides and Documentation section below. ## Images ![Pentair R171218 Rainbow 320C Automatic in-Line Chlorine/Bromine Feeder for Pool and Spa - Amber Body - Image 1](https://m.media-amazon.com/images/I/71MljBDQq9L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good Quality *by D***Y on March 30, 2025* This is my second item I have used. The sun and chlorine causes the clear material to get opaque and you can no longer see the level of the chlorine tablets inside. I had the first one 7 years and it was still working, just couldn't see through it anymore. It does a great job automating your chlorine task. ### ⭐⭐⭐⭐⭐ Modification AIR VENT *by J***N on May 21, 2021* Put the unit in (very straight forward) and put 3-3" tabs into service. Monitored with test strips and it appeared to be doing great. After about 5 days the chlorine began dropping and it didn't seem the tabs were dissolving. Upon reading numerous reviews here on Amazon, I went to check if there was water in the tab column and there wasn't (I couldn't tell by looking - I can now). So I vented the column by loosening the cap and re-torquing shut, increased the thru-put and let it go at that. Pump shuts down at 8:30 PM and starts at 8:30 AM. Next morning upon start the chamber did not fill until I vented it as before. I took the timer out of the mix to run 24/7. I ordered a 1/2" npt air vent (like used to vent water baseboard heating systems) and a 1/2" nipple, TEE and cap. Placed the the works on the unit and it works like a charm with no problems at morning restart. I ordered the air vent (cast bronze - $10-$12) through Amazon and the other components I bought at the nearest box store. Problem resolved. Pool is crystal clear and test strips all running in range. Beats hauling liquid Chlorine and it's good for 3+ weeks (12,000 gallon pool} on 8 tabs. I'll add that chlorine concentration to harm brass and bronze must be 100ppm and I have 3-5 ppm free chlorine at any time and as the tab chamber drains when the pump is off there is little chlorine dissolved during the off period. ### ⭐ Do NOT Under Any Circumstances Buy This Product *by K***N on June 30, 2022* I purchased the chlorinator with the amber/clear chamber to replace my old Pentair. It was a direct "Bolt & Go" so I didn't have to modify my plumbing which was nice. However, where the manufacturer I'm assuming solvent weld's the upper cap fitting to the amber tube, is dripping non-stop. It definitely is not the upper cap or the threaded port.I reached out to InTheSwim to return this item for a new one but they chose to hide behind the baloney excuse of saying this is a "Hazardous Item" and can not be returned. Even though they as a business literally ship and warehouse 50lb tubs of Chlorine. And UPS certainly ships 50lb tubs of Chlorine seeing as how I purchased one off Amazon earlier in the spring.They advised me to contact Pentair directly. Which I did. I filled out their web form with all the required details and still no reply. It's been a week and yes I check my spam filter to be sure.Seeing as how my old one needed to be replaced I have to keep this leaking one on my system. The cool part is how the chamber drains when the pump is off because the leak breaks the vacuum. Then when the pump kicks on, it fills the air with what is basically chlorine gas for the first 30 seconds or so. I can admire the fresh scent of a pool from down the street this way. ## Frequently Bought Together - Pentair R171218 Rainbow 320C Automatic in-Line Chlorine/Bromine Feeder for Pool and Spa - Amber Body - Pentair R172288 Corrosion Resistant Check Valve Replacement Pool and Spa Automatic Feeder - 2-Pack Chlorinator Lid Replacement O-Ring For Pentair Rainbow Models 300/320 R172009 O-283 2 Pack --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/5000720-pentair-r171218-rainbow-320c-automatic-in-line-chlorine-bromine-feeder](https://www.desertcart.tn/products/5000720-pentair-r171218-rainbow-320c-automatic-in-line-chlorine-bromine-feeder) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-06-06*