Best Automatic Chlorinators In August 2025

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Here you have our curated list of Best Automatic Chlorinators. Each of them comes with different price, style, and design, so you have plenty of options to choose from. Keep reading for our top products review!

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

Top Rated Best Automatic Chlorinators Of 2025

Rank	Product Name	Score
1	Hayward CL200 In-line Automatic Chemical Feeder Buy Now	9.7 Buy Now
2	Hayward CL220 Off-line Automatic Chemical Feeder Buy Now	9.5 Buy Now
3	Pentair R171096 Rainbow 320 Automatic In-Line Chlorine/Bromine Feeder For Pool And Spa Buy Now	9.1 Buy Now
4	Pentair R171016 Rainbow 300 Automatic Chlorine/Bromine Off-Line Pool and Spa Feeder Buy Now	8.8 Buy Now
5	Pentair R171218 Rainbow 320C Automatic In-Line Chlorine/Bromine Feeder For Pool And Spa Buy Now	8.6 Buy Now
6	Hayward CL2002S In-line Automatic Chemical Feeder Buy Now	8.3 Buy Now
7	Hayward CL100 Automatic Chlorine Feeder Buy Now	8.1 Buy Now
8	Waterway Plastics CAG004-W Clearwater in-Line Automatic Chlorinator Buy Now	7.8 Buy Now

1. Hayward CL200 In-line Automatic Chemical Feeder

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

2. Hayward CL220 Off-line Automatic Chemical Feeder

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

3. 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
• Measures 17 3/4-inch h, 5-inch w ,10-inch d
• Uses 1/4-inch feeder hoses, control valve and fittings
• 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

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

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

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

• Measures 17-3/4 h x 5 w x 10 d inches
• 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
• Rainbow 320 (cylinder) automatic chlorine/bromine in-line pool and spa feeder

6. Hayward CL2002S In-line Automatic Chemical Feeder

• Uses large or small, slow dissolving, trichlor or bromine tablets or sticks, works on newly constructed or already existing pools and spas
• Dial control valve allows for simple feed rate adjustment, features 2" inlet and outlet ports for application with 50 gpm to 90 gpm flow rates
• In-line chlorinator for above-ground and in-ground pools and spas
• Simple installation when replacing existing chlorinator or brominator, easy-lok threaded cover for safe and convenient access to add tablets or sticks
• Chemical feeder that will automatically release chemicals so you don't have to, unique finger-release catch provides extra security

7. Hayward CL100 Automatic Chlorine Feeder

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

8. Waterway Plastics CAG004-W Clearwater in-Line Automatic Chlorinator

• Part # cag004-w
• For above ground pool
• Made in the usa