--- product_id: 92519769 title: "Pentair R171218 Rainbow 320C Automatic In-Line Chlorine/Bromine Feeder For Pool And Spa - Amber Body" brand: "pentair" price: "40912877β‚«" currency: VND in_stock: true reviews_count: 5 category: "Pentair" url: https://www.desertcart.vn/products/92519769-pentair-r171218-rainbow-320c-automatic-in-line-chlorine-bromine-feeder store_origin: VN region: Vietnam --- # Treats up to 70,000 gallons See-through amber body for easy monitoring Fully enclosed, no venting needed Pentair R171218 Rainbow 320C Automatic In-Line Chlorine/Bromine Feeder For Pool And Spa - Amber Body **Brand:** pentair **Price:** 40912877β‚« **Availability:** βœ… In Stock ## Summary > πŸ’¦ Keep your pool pristine with effortless 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?** 40912877β‚« with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/92519769-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 - β€’ **Compact Yet Powerful:** Optimized 17.5 x 21 x 20-inch design fits seamlessly into your pool system without sacrificing performance - β€’ **Crystal Clear Monitoring:** Amber transparent body lets you track chemical levels at a glanceβ€”no guesswork needed - β€’ **Plug-and-Play Simplicity:** Completely enclosed system eliminates the need for special venting or complex setup - β€’ **Versatile Treatment Range:** Effortlessly manages pools and spas from 6,500 to 70,000 gallons with dual feed options - β€’ **Massive Capacity, Minimal Hassle:** Holds up to 98 small or 11 large bromine/trichlor tablets for extended maintenance cycles ## Overview The Pentair R171218 Rainbow 320C is an automatic in-line chlorine/bromine feeder designed for pools and spas, featuring a see-through amber body for easy chemical monitoring. It supports treatment capacities ranging from 6,500 to 70,000 gallons depending on feed configuration, holds up to 98 small or 11 large tablets, and operates as a fully enclosed system requiring no special venting. ## 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. Review: Producto sencillo i con grandes posibilidades. El visor transparente lo hace unico en su gama i obtimiza el mantenimiento del sistema. Muy recomendable un SPA i piscinas particulares donde la cloracion en el skimer presenta un consumo excesivo de cloro i su disolucion es irregular Review: This chlorine dispenser is awesome. Fill it and leave it. Easy to see how much chlorine is left. It’s made my pool maintenance so much easier. Make sure you get the back check valve to protect your pool heater. ## Features - Rainbow 320 (cylinder) 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 - Completely enclosed system, no special venting required - Measures 17-1/2-inch length by 21-inch height by 20-inch width ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B004GXSBPS | | Best Sellers Rank | 654,347 in Garden ( See Top 100 in Garden ) 1,764 in Chlorine | | Customer Reviews | 4.3 4.3 out of 5 stars (387) | | Date First Available | 8 Aug. 2012 | | Item display height | 18 inches | | Item display length | 21.8 inches | | Item display width | 19 inches | | Item model number | R171218 | | Manufacturer | Pentair | | Part number | R171218 | | Product Dimensions | 44.45 x 50.8 x 53.34 cm; 1.97 kg | ## 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/415AX9q5TOL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐ Review *by C***N on 6 May 2018* Producto sencillo i con grandes posibilidades. El visor transparente lo hace unico en su gama i obtimiza el mantenimiento del sistema. Muy recomendable un SPA i piscinas particulares donde la cloracion en el skimer presenta un consumo excesivo de cloro i su disolucion es irregular ### ⭐⭐⭐⭐⭐ Review *by J***D on 1 January 2020* This chlorine dispenser is awesome. Fill it and leave it. Easy to see how much chlorine is left. It’s made my pool maintenance so much easier. Make sure you get the back check valve to protect your pool heater. ### ⭐⭐⭐⭐⭐ Review *by J***N on 21 May 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. ## 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? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.vn/products/92519769-pentair-r171218-rainbow-320c-automatic-in-line-chlorine-bromine-feeder](https://www.desertcart.vn/products/92519769-pentair-r171218-rainbow-320c-automatic-in-line-chlorine-bromine-feeder) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-05-18*