Best Inline Chlorinators In September 2026

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With the number of alternatives available on the market, getting the right one could sometimes be a difficult task.. That’s why our platform is dedicated to product testing and coming up with this list of top 10 Best Inline Chlorinators. Having done thorough research on this topic, we hope that our list will help you find the one you need!

To help you in your search, we have completed this list of the Best Inline Chlorinators.

Top Rated Best Inline Chlorinators Of 2026

Rank	Product Name	Score
1	Rx Clear Automatic Chlorinator | for In-ground Swimming Pools | in-line Chemical Chlorine Buy Now	9.7 Buy Now
2	Pentair R171218 Rainbow 320C Automatic In-Line Chlorine/Bromine Feeder For Pool And Spa Buy Now	9.5 Buy Now
3	Pentair R172052 Cap Wrench Replacement Pool and Spa Filter and Feeder Buy Now	9.1 Buy Now
4	Hayward CL100 Automatic Chlorine Feeder Buy Now	8.8 Buy Now
5	Pentair R171096 Rainbow 320 Automatic In-Line Chlorine/Bromine Feeder For Pool And Spa Buy Now	8.6 Buy Now
6	Automatic Chlorinator for Above Ground and In-Ground Pools In-Line 4.2 Lbs Buy Now	8.3 Buy Now
7	Hayward CL200 In-line Automatic Chemical Feeder Buy Now	8.1 Buy Now
8	Hayward CL220 Off-line Automatic Chemical Feeder Buy Now	7.8 Buy Now
9	Pentair R171016 Rainbow 300 Automatic Chlorine/Bromine Off-Line Pool and Spa Feeder Buy Now	7.5 Buy Now
10	Automatic Chlorinator for Above Ground and In-Ground Pools Off-Line 4.2 lbs Buy Now	7.2 Buy Now

1. Rx Clear Automatic Chlorinator | for In-ground Swimming Pools | in-line Chemical Chlorine

• Holds 9 lbs of chlorine tablets - small or large, slow dissolving, trichlor tablets -dial control valve allows for simple feed rate adjustment.
• Never use - any petroleum based lubricants on cover o-ring. regular lubrication is necessary to allow for easy cover removal. use non-petroleum based lubricants such as jack's no. 327 lube. warranty - 1 year.
• Simple installation - easy-lok threaded cover for safe access to add tablets.
• Save on chlorine - use and regulate your chlorine level effortlessly. dial adjustment valve controls sanitizer flow. corrosion-proof. installs easily into existing filter system. in-line feeders require pvc plumbing. off-line feeders tap into the existing pvc.
• Caution - extreme care must be exercised when adding chemicals to your pool. concentrated chemicals react violently if they mix in the chemical feeder, causing a fire or explosion, which may result in property damage, personal injury or death.

2. Pentair R171218 Rainbow 320C Automatic In-Line Chlorine/Bromine Feeder For Pool And Spa

• Rainbow 320 (cylinder) automatic chlorine/bromine in-line pool and spa feeder
• Holds 11 large or 98 small bromine or slow dissolving trichlor tablets
• Completely enclosed system, no special venting required
• 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
• Measures 17-3/4 h x 5 w x 10 d inches

3. Pentair R172052 Cap Wrench Replacement Pool and Spa Filter and Feeder

• Cap wrench replacement
• Also fits pentair rainbow automatic chlorine/bromine in-line pool and spa feeder models 300, 302, 300-29x, 320, 322
• Country of origin: united states
• Fits pentair standard and high square feet module cartridge filters

4. Hayward CL100 Automatic Chlorine Feeder

• Easy-lok threaded cover for safe and convenient access to add tablets
• Simple installation for do-it-yourselfers
• Uses 3-inch diameter tricolor s tablets
• Dial control valve lets you control and adjust the rate of feed
• Unique finger-release catch provides extra security

5. Pentair R171096 Rainbow 320 Automatic In-Line Chlorine/Bromine Feeder For Pool And Spa

• Rainbow 320 automatic chlorine/bromine in-line pool and spa feeder
• Uses 1/4-inch feeder hoses, control valve and fittings
• Measures 17 3/4-inch h, 5-inch w ,10-inch d
• Holds 11 large or 98 small bromine or slow dissolving trichlor tablets
• Treats 6,500 to 27,000 gallons bottom feed and 18,000 to 70,000 gallons top feed

6. Automatic Chlorinator for Above Ground and In-Ground Pools In-Line 4.2 Lbs

• Fits 3'' chlorine tablets only
• Dial control valve lets you control and adjust the rate of feed
• Good for slow dissolve tri-chlor tablets or bromine sticks/tabs
• Easy threaded cover for safe and convenient access to add tablets or sticks
• Corrosion resistant construction for long lasting life

7. Hayward CL200 In-line Automatic Chemical Feeder

• Uses large or small, slow dissolving tablets
• Unique finger-release catch provides extra security
• Durable abs body and high quality viton seal for extended life
• Easy-lok threaded cover for safe and convenient access to add tablets
• Dial control valve allows for easy feed rate adjustment

8. Hayward CL220 Off-line Automatic Chemical Feeder

• Easy-lok threaded cover for safe and convenient access to add tablets
• Dial control valve allows for easy feed rate adjustment
• Unique finger-release catch provides extra security
• Durable abs body and high quality viton seal for extended life
• Uses large or small, slow dissolving tablets

9. Pentair R171016 Rainbow 300 Automatic Chlorine/Bromine Off-Line Pool and Spa Feeder

• Uses 1/4-inch feeder hoses, control valve and fittings
• Holds 11 large or 98 small tablets, treats 12,000 to 48,000 gallons
• Operates on pressure side of pumps
• Measures 14-3/4-inch length by 23-inch height by 22-1/4-inch width
• Rainbow 300 automatic chlorine/bromine off-line pool and spa feeder

10. Automatic Chlorinator for Above Ground and In-Ground Pools Off-Line 4.2 lbs

• Good for slow dissolve tri-chlor tablets or bromine sticks/tabs
• Dial control valve lets you control and adjust the rate of feed
• Easy threaded cover for safe and convenient access to add tablets or sticks
• Corrosion resistant construction for long lasting life
• Fits 3'' chlorine tablets only