Best Inline Chlorinators In April 2025

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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 2025

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

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

1
9.7/10 our score

  • 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.
  • Simple installation - easy-lok threaded cover for safe access to add tablets.
  • 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.
  • 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.
  • Holds 9 lbs of chlorine tablets - small or large, slow dissolving, trichlor tablets -dial control valve allows for simple feed rate adjustment.

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

2
9.5/10 our score

  • 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
  • Holds 11 large or 98 small bromine or slow dissolving trichlor tablets
  • Measures 17-3/4 h x 5 w x 10 d inches
  • Rainbow 320 (cylinder) automatic chlorine/bromine in-line pool and spa feeder

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

3
9.1/10 our score

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

4. Hayward CL100 Automatic Chlorine Feeder

4
8.8/10 our score

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

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

5
8.6/10 our score

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

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

6
8.3/10 our score

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

7. Hayward CL200 In-line Automatic Chemical Feeder

7
8.1/10 our score

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

8. Hayward CL220 Off-line Automatic Chemical Feeder

8
7.8/10 our score

  • Dial control valve allows for easy feed rate adjustment
  • Easy-lok threaded cover for safe and convenient access to add tablets
  • 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

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

9
7.5/10 our score

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

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

10
7.2/10 our score

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

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