Best In Line Chlorinators In July 2025

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Are you an enthusiast of Best In Line Chlorinators? If so, you definitely want to check out the following top 10 Best In Line Chlorinators.

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

Top Rated Best In Line Chlorinators Of 2025

Rank	Product Name	Score
1	Pool Ruler R172009 Chlorine Resistant VITON O-Ring 2 Pack + Lubricant for Pentair Buy Now	9.7 Buy Now
2	Rx Clear Automatic Chlorinator | for In-ground Swimming Pools | in-line Chemical Chlorine Buy Now	9.5 Buy Now
3	Pool Ruler CLX200K O-Ring (Chlorine Resistant VITON) + Lubricant for Hayward CL200 Buy Now	9.1 Buy Now
4	Hayward CL200 In-line Automatic Chemical Feeder Buy Now	8.8 Buy Now
5	Automatic Chlorinator for Above Ground and In-Ground Pools In-Line 4.2 Lbs Buy Now	8.6 Buy Now
6	Pentair R171096 Rainbow 320 Automatic In-Line Chlorine/Bromine Feeder For Pool And Spa Buy Now	8.3 Buy Now
7	Pentair R171218 Rainbow 320C Automatic In-Line Chlorine/Bromine Feeder For Pool And Spa Buy Now	8.1 Buy Now
8	Pentair R172052 Cap Wrench Replacement Pool and Spa Filter and Feeder Buy Now	7.8 Buy Now
9	Hayward CL220 Off-line Automatic Chemical 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. Pool Ruler R172009 Chlorine Resistant VITON O-Ring 2 Pack + Lubricant for Pentair

• Chlorine resistant viton: our r172009 o-ring is manufactured with viton (fkm) which is resistant to chlorine, meaning a long lasting seal for your pentair chlorinator
• Pool ruler authorized seller: westworks is the only authorized seller of pool ruler brand o-rings, if you see this from another seller it does not have a guarantee, and is likely a non-viton imitation.
• Full season guarantee: this 2 pack will last you the whole season, if not, we will refund or replace the kit, your choice.
• Free lubricant: 1cc tube of pool ruler synthetic grease with teflon (ptfe) included. this lubricant is safe for use on o-rings and your pool.
• Two pack: use one now, keep the other as a spare.

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

• 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.
• 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.
• Holds 9 lbs of chlorine tablets - small or large, slow dissolving, trichlor tablets -dial control valve allows for simple feed rate adjustment.

3. Pool Ruler CLX200K O-Ring (Chlorine Resistant VITON) + Lubricant for Hayward CL200

• Exact fit: designed to oem standards, our clx200k o-ring is an exact fit for your cl200 or cl220 chlorinator.
• Pool ruler authorized seller: westworks is the only authorized seller of pool ruler brand o-rings, if you see this from another seller it does not have a guarantee, and is likely a non-viton imitation.
• One year guarantee: we will return or replace your o-ring if it does not last you for a full year if taken care of properly.
• Chlorine resistant viton: our clx200k o-ring is manufactured with viton (fkm) which is resistant to chlorine, meaning a long lasting seal for your hayward chlorinator
• Free lubricant: 1cc tube of pool ruler synthetic grease with teflon (ptfe) included. this lubricant is safe for use on o-rings and your pool.

4. Hayward CL200 In-line Automatic Chemical Feeder

• 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
• Unique finger-release catch provides extra security
• Uses large or small, slow dissolving tablets

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

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

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

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

• 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
• 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

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

• 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
• Fits pentair standard and high square feet module cartridge filters
• Cap wrench replacement

9. Hayward CL220 Off-line Automatic Chemical Feeder

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

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

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