Inline pool chlorinators simplify chemical dosing by dispensing chlorine or bromine directly into your pool’s return line. This article highlights five top inline feeders, comparing design features, compatibility, and user benefits. Whether you maintain a residential pool or a spa, these units offer automated, low-maintenance options to keep water clear and balanced.
| Product | Brand |
|---|---|
| Pentair Rainbow 320 / R171096 | Pentair |
| XtremepowerUS Inline Automatic Chlorinator | XtremepowerUS |
| CL200 Inline Automatic Chlorinator | Edovaf |
| Upgraded 320 Pool Chlorinator | Vikua |
| Custom Molded Inline CHLORINATOR PWRCLN ULTR | Custom Molded Products |
Note: All listed products are inline feeders designed to connect directly into pool plumbing. Each option supports varying tank capacities, installation configurations, and control dial features. Consider compatibility with your pool size, preferred chlorine form (tablet or disk), and whether you need a line-side or off-line installation when choosing the best inline chlorinator for your setup.
Pentair Rainbow 320 In-Line Chlorine Feeder
The Pentair Rainbow 320 in-line feeder integrates into the pool return line with a closed system design that minimizes gas escape and complications. It supports a broad range of tank configurations, with the ability to hold multiple chlorine tablets and accommodate pools across a wide size spectrum. This model emphasizes a completely enclosed operation, eliminating the need for special venting in many installations.
Key features include permanent installation in the return line of both new and existing pools or spas, standard 2″ slip PVC fittings, and adapters for 1-1/2″ piping. The unit is designed for straightforward hookup, enabling ongoing, hands-off sanitization that reduces manual dosing time and maintenance effort.
XtremepowerUS Inline Automatic Chlorinator
This inline chlorinator is designed for installation in the pool water return line, offering a quick and simple setup. It connects directly into your pool equipment piping, promoting an automated approach to chlorine management. A dial-controlled adjustable valve lets you regulate how quickly tablets or pucks dissolve, enabling tailored dosing to match pool size, turnover rate, and usage patterns.
Designed to support 3-inch slow-dissolve tablets, it prioritizes ease of adjustment and consistent tablet dissolution. Its inline configuration makes it a practical choice for many residential pools that want upgraded automation without a complete equipment overhaul.
CL200 Inline Automatic Chlorinator
The CL200 inline chlorinator offers compatibility with both above-ground and in-ground pool systems. Made with heavy-duty resin, it ships with fittings for 2-inch pipe, facilitating straightforward installation in a wide variety of pool layouts. The device includes a dial-controlled feed rate to adjust chlorine or bromine release, and a safety latch that enhances operator protection during maintenance and refills.
Designed for pools up to sizable volumes, this model blends durability with ease of use, delivering reliable inline chlorination without requiring major plumbing work. The safety-conscious design and flexible installation options make it a versatile option for many homeowners and DIY installers.
Upgraded 320 Pool Chlorinator (Vikua)
This 320-rated chlorinator is designed to work with Rainbow 320 control systems and offers a modernized, closed-cycle approach to pool sanitation. It supports large-capacity bottom and top feed configurations and accommodates a broad range of pool sizes, including spas. The design emphasizes improved sealing with a gasketed chlorinator cover, a robust control valve, and a bottom drain for easy removal of residual liquids. A dedicated feed hose and top vent plug help manage gas buildup and maintain consistent operation.
With compatibility for 6,500 to 27,000 gallons on bottom feed and 18,000 to 70,000 gallons on top feed, this unit is positioned for mid-to-large residential pools and some light commercial applications. The flexible design supports straightforward maintenance and reliable chlorine distribution across the water volume.
Custom Molded Inline CHLORINATOR PWRCLN ULTR
The Inline CHLORINATOR PWRCLN ULTR is a compact inline feeder designed for straightforward integration into standard pool plumbing. While compact in description, it offers a practical solution for households seeking a dependable, low-profile chlorinator that can be slotted into existing lines without extensive pipe work. The product’s inline design supports easy installation and maintenance, with a focus on consistent chlorine delivery and simplified servicing.
Buying Guide: Inline Pool Chlorinators
Choosing the right inline chlorinator involves assessing installation requirements, pool size, preferred sanitizing chemical form, and maintenance expectations. Here are key purchase considerations and how they apply to the models above.
- Installation configuration: Decide between inline (in-line with return line) and off-line (external to the main flow). Inline feeders generally offer constant dosing with minimal pressure loss, suitable for most residential pools.
- Tank capacity and tablet compatibility: Larger pools benefit from units with higher tablet capacity and the ability to use 3-inch slow-dissolve tablets. Consider whether you need to host both chlorine and bromine options.
- Sealing and venting: Look for units with improved gasket sealing and minimal vent requirements to reduce leaks and maintenance. Closed systems reduce odor and escape of gases.
- Flow control and dosing: Some models provide dial-based flow control to adjust the dissolution rate. Accurate dosing helps maintain stable free chlorine and total alkalinity levels and reduces chemical waste.
- Material and durability: Resin or reinforced plastics are common for inline feeders. Ensure the material is UV-stable and compatible with pool chemicals to extend life.
- Compatibility with existing equipment: Check piping size (2″ or 1-1/2″ adapters) and whether the feeder is compatible with your filter, heater, and return lines.
- Safety features: Look for finger-release latches, secure caps, and robust safety mechanisms for easy maintenance without exposing users to concentrated chemicals.
- Maintenance requirements: Consider how easy it is to refill tablets, clean the chamber, or replace seals. Reduced maintenance translates to lower long-term costs and downtime.
- Warranty and brand support: Reputable brands with good customer service and readily available replacement parts can simplify ownership and troubleshooting.
When evaluating these five options, align your choice with pool size, turnover rate, and preferred maintenance level. For smaller residential pools, inline feeders with compact capacities and straightforward dial controls can deliver reliable, hands-off chlorination. For larger or spa-inclusive setups, prioritize units with higher capacity and more robust sealing, ensuring consistent dosing even during heavy use.