Choosing the right automatic chlorine feeder can make pool maintenance simpler and more reliable. Among the top options, Hayward CL220EF stands out for its enclosed design and ease of use, making it ideal for those seeking safety and straightforward operation. Hydrotools 8750 offers a solar-powered, automatic solution with adjustable output and a fun lighting feature, perfect for pool owners who want a high-tech, hands-off approach. Meanwhile, XtremepowerUS Inline provides a durable, easy-to-install inline option suited for small or above-ground pools. Each of these picks balances ease of use, durability, and automation but differs in installation complexity, control features, and capacity.
Complete the kit
Key Takeaways
- The best automatic feeders balance ease of installation with reliable chemical dispensing.
- Inline models are generally easier for quick setup, but off-line systems offer more precise control.
- Capacity and tablet size are critical for reducing refilling frequency in larger pools.
- Durability and chemical resistance are essential for long-term performance.
- Additional features like solar power or safety enclosures add convenience but may come with higher costs.
| XtremepowerUS Inline Automatic Chlorinator for Pools, 3-Inch, Compatible with Cl200 |  | Best Inline Model for Small to Medium Pools | Type: Inline | Control Valve Type: Dial Knob | Max Diameter Tablet: 3″ | VIEW LATEST PRICE | See Our Full Breakdown |
| Hayward CL220EF Off-Line Chemical Feeder, 9 lbs Capacity |  | Best Enclosed Off-Line Feeder for Safety and Simplicity | Capacity: 9 lbs | Item Type: Off-line Automatic Chemical Feeder | Material: ABS | VIEW LATEST PRICE | See Our Full Breakdown |
| Hydrotools by Swimline 8750 Super Premium In-Line Automatic Chlorine Feeder, Adjustable Output, 9.0 Lbs Capacity |  | Best Automated, Adjustable, Solar-Powered In-Line Feeder | Capacity: 9.0 lbs | Tablet Size: 3 inches | Compatibility: Above ground & inground pools | VIEW LATEST PRICE | See Our Full Breakdown |
| Pentair Rainbow 320 Automatic In-Line Chlorine/Bromine Feeder |  | Best Large Capacity for Pools and Spas | Brand: Pentair | Model Number: R171096 | Fitting Size: 2-inch slip PVC | VIEW LATEST PRICE | See Our Full Breakdown |
| Hayward CL200EF In-Line Automatic Chlorine Feeder for In-Ground Pools |  | Best for In-Ground Pools with Steady Chlorine Distribution | Capacity: 9 lbs | Installation Type: In-line offline | Material: Corrosion-resistant housing | VIEW LATEST PRICE | See Our Full Breakdown |
| automatic chlorine feeder for inground pool | Capacity |
|---|---|
| XtremepowerUS Inline Automatic | 9 Pounds |
| Hayward CL220EF Off-Line Chemi | 9 lbs |
| Hydrotools by Swimline 8750 Su | 9.0 lbs |
| Pentair Rainbow 320 Automatic | — |
| Hayward CL200EF In-Line Automa | 9 lbs |
More Details on Our Top Picks
XtremepowerUS Inline Automatic Chlorinator for Pools, 3-Inch, Compatible with Cl200
This inline chlorinator shines for its straightforward installation and adjustable dosing, making it ideal for those who want a set-it-and-forget-it system. Compared with off-line options, it’s easier to integrate directly into the return line, which streamlines setup. However, it requires proper pressure management to prevent over-chlorination, and tablets are sold separately, which adds to ongoing costs. Its durable, UV-resistant construction ensures longevity, but its capacity and manual control mean it may need frequent refilling for larger pools.
Pros:- Easy to install directly into return lines
- Adjustable dial control for precise dosing
- Durable, UV-resistant resin construction
Cons:- Chlorine tablets sold separately
- Requires correct pressure setup to avoid over-chlorination
Best for: Pool owners with small to medium in-ground or above-ground pools who prefer inline installation.
Not ideal for: Those seeking digital controls, automation customization, or handling large, high-volume pools.
- Type:Inline
- Control Valve Type:Dial Knob
- Max Diameter Tablet:3″
- Capacity:9 Pounds
- Max Pressure:50 PSI
- Max Output:32 LBS/HR
Our verdict“A reliable, straightforward inline chlorinator perfect for small pools or those wanting simple installation and operation.”
Hayward CL220EF Off-Line Chemical Feeder, 9 lbs Capacity
This off-line feeder provides a safe, enclosed environment for chlorine tablets, reducing fumes and spills—an important factor for indoor or sensitive setups. Its fully enclosed design and threaded cover make refilling safer and cleaner, but it limits flexibility because it must be installed off-line, away from the return line. It’s durable and simple to operate, lacking digital controls or advanced features, which might be a drawback for tech-savvy users. It’s ideal for those who prioritize safety and straightforward operation over automation.
Pros:- Enclosed design prevents fumes and spills
- Easy access for refilling with threaded cover
- Durable ABS body with Viton seal
Cons:- Limited to off-line applications
- Requires compatible PVC plumbing setup
- No digital controls or automation features
Best for: Pool owners who want a secure, off-line system with minimal fuss and safety features.
Not ideal for: Those wanting advanced control, digital features, or inline installation options.
- Capacity:9 lbs
- Item Type:Off-line Automatic Chemical Feeder
- Material:ABS
- UPC:610377003926
Our verdict“A safe, simple off-line feeder ideal for users prioritizing safety and ease of refilling over automation.”
Hydrotools by Swimline 8750 Super Premium In-Line Automatic Chlorine Feeder, Adjustable Output, 9.0 Lbs Capacity
The Hydrotools 8750 combines automation with fun features like solar power and dusk lighting, making it appealing for tech-enthusiast pool owners. Its adjustable chlorine output allows precise control for pools of various sizes, and its durable, chemical-resistant materials promise long-term performance. Yet, it requires proper installation, and tablets are sold separately, which can add to the overall cost. Compared to simpler inline models, it offers more control, but some users may find its features unnecessary for small or basic pools.
Pros:- Automatic chlorine dispensing simplifies maintenance
- Adjustable output for precise control
- Solar-powered with fun dusk lighting
Cons:- Tablets not included, requiring separate purchase
- Requires proper installation for optimal performance
Best for: Pool owners who want a high-tech, solar-powered automatic feeder with adjustable dosing.
Not ideal for: Those seeking a purely manual or budget-friendly solution, or with limited installation experience.
- Capacity:9.0 lbs
- Tablet Size:3 inches
- Compatibility:Above ground & inground pools
- Power Source:Solar
- Lighting:Light-up at dusk
- Holds:Up to 5 tablets
Our verdict“A feature-rich, solar-powered inline feeder ideal for tech-savvy owners seeking adjustable, automated chlorine control.”
Pentair Rainbow 320 Automatic In-Line Chlorine/Bromine Feeder
The Pentair Rainbow 320 is designed for larger pools and spas, holding up to 11 large or 98 small bromine or trichlor tablets. Its large capacity reduces refilling frequency, making it a good choice for busy pool owners. Installation is straightforward with standard fittings, but its limited compatibility with only 1-1/2 inch unions could pose challenges for some setups. It’s a solid choice for those who want a low-maintenance, large-capacity solution, though it lacks digital controls or advanced features for fine-tuning.
Pros:- Large capacity reduces refilling frequency
- Easy to install with standard fittings
- Automates chemical dispensing for pools and spas
Cons:- Limited compatibility with some plumbing setups
- No digital controls or advanced features
Best for: Owners of large pools or spas needing high-capacity, automated chemical delivery.
Not ideal for: Small pools or users wanting advanced digital control features.
- Brand:Pentair
- Model Number:R171096
- Fitting Size:2-inch slip PVC
- Tablet Capacity:11 large or 98 small bromine/trichlor tablets
- Warranty:1 year
Our verdict“A high-capacity, easy-to-install feeder best suited for large pools or spas requiring less frequent refilling.”
Hayward CL200EF In-Line Automatic Chlorine Feeder for In-Ground Pools
The Hayward CL200EF is tailored for in-ground pools, holding up to 9 lbs of chlorine tablets and offering adjustable chlorine output. Its corrosion-resistant housing ensures durability in outdoor environments, and installation is straightforward for most standard in-line setups. It provides consistent chlorine dispensing, but proper installation is critical to prevent issues like over-chlorination or uneven distribution. It’s a reliable, no-frills option for those who want steady, automated sanitation without extra bells and whistles.
Pros:- Automates chlorine distribution for consistent water quality
- High-capacity design reduces refilling needs
- Corrosion-resistant construction for outdoor durability
Cons:- Requires proper installation for best results
- Limited to in-line offline systems
Best for: In-ground pool owners needing a durable, steady chlorine dispenser.
Not ideal for: Those who want digital controls, advanced features, or off-line setups.
- Capacity:9 lbs
- Installation Type:In-line offline
- Material:Corrosion-resistant housing
Our verdict“A sturdy, in-line feeder perfect for in-ground pools requiring consistent chlorine supply.”
How We Picked
Our selection process focused on models specifically designed for inground pools, emphasizing ease of installation, durability, and automation features. We compared capacity, control options, compatibility with common pool sizes, and user reviews to identify which feeders offer consistent, reliable chlorine distribution. Mechanical simplicity and safety features also played a role, with a preference for models that balance performance with value. We aimed to highlight options suitable for different pool sizes and maintenance preferences, ensuring a well-rounded selection.
Factors to Consider When Choosing Best Automatic Chlorine Feeder For Inground Pool
Choosing the right automatic chlorine feeder depends on your pool size, maintenance preferences, and installation setup. A key consideration is whether you prefer inline models, which are integrated directly into your plumbing, or off-line systems that sit separately but may offer safer handling. Capacity is equally important: larger pools need feeders that can hold more tablets to reduce refilling frequency. Features like adjustable output, durability, and safety enclosures can streamline maintenance and enhance longevity. Overall, matching the right system to your pool size and maintenance style ensures better water quality with less hassle.
Installation Type
Inline feeders are installed directly in the return line and tend to be more straightforward for new setups. Off-line feeders sit separately and are often safer, especially for indoor pools or sensitive environments. Consider your existing plumbing and whether a simple inline model suffices or a more enclosed off-line system is needed for safety and ease of refilling.
Capacity and Tablet Size
Capacity determines how often you’ll need to refill the feeder. Larger pools require higher capacity models, typically holding 9-11 pounds of tablets. Tablet size also impacts refilling frequency; 3-inch tablets are common and hold a good amount of chemical, but check your pool’s chlorine demand to select appropriately.
Automation and Control
Some models offer adjustable output or even solar-powered features, which can optimize chlorine levels based on your pool’s needs. Digital or smart controls are rare but available in higher-end models, providing more precise dosing and monitoring. Decide if you need basic automation or advanced control features for your pool management style.
Durability and Material
Look for corrosion-resistant materials like UV-stable resin or durable plastics, especially if your pool is outdoors. Enclosed designs or models with safety features also help prevent spills or fumes, ensuring safer handling. Consider the environmental conditions and choose a model built for longevity.
Frequently Asked Questions
How often do I need to refill my automatic chlorine feeder?
The refill frequency depends on your pool size, the capacity of your feeder, and your chlorine demand. Small to medium pools with a 9-pound capacity feeder might need refilling every 2-4 weeks, while larger pools or higher usage may require more frequent refills. Monitoring your chlorine levels regularly can help you determine the best schedule to keep your water sanitized without over-chlorinating.
Can I use any type of chlorine tablets with these feeders?
Most feeders are designed for 3-inch slow-dissolving tablets, but it’s important to check the manufacturer’s specifications. Some models are compatible with sticks or other tablet sizes, while others may require specific types of tablets for optimal performance. Using the recommended tablets ensures proper dissolution and consistent chlorine levels.
Are automatic feeders safe for indoor pools?
Yes, but safety considerations are important. Enclosed, off-line feeders like the Hayward CL220EF are safer options for indoor pools, reducing fumes and spills. Inline models can be used if installed properly with adequate ventilation and safety measures. Always follow manufacturer guidelines to prevent over-chlorination or chemical exposure indoors.
What maintenance is required for these feeders?
Maintenance generally involves refilling tablets, cleaning the unit to prevent build-up, and inspecting for cracks or leaks. Regularly checking chlorine levels and adjusting output helps maintain water quality. Enclosed models tend to require less frequent cleaning, but all feeders should be inspected periodically to ensure proper operation.
How do I install an inline automatic chlorine feeder?
Inline feeders are installed directly into your pool’s return line, usually between the pump and filter. You’ll need compatible fittings and to follow the manufacturer’s instructions carefully. Proper installation ensures even chlorine dispersion and prevents over-chlorination. If unsure, consulting a professional can help guarantee correct setup and safe operation.
Conclusion
Choosing the best automatic chlorine feeder depends heavily on your pool type, size, and maintenance preferences. In-ground pool owners seeking durable, steady chlorine delivery will appreciate models like the Hayward CL200EF for its reliability and safety. Tech-savvy owners or those wanting adjustable, solar-powered options may prefer the Hydrotools 8750 for its automation features. For smaller or above-ground pools, the XtremepowerUS Inline offers straightforward installation and operation. Ultimately, matching your pool’s demands with the right features ensures clean, safe water with minimal hassle.
