Automatic chlorinators keep inground pools clean and sanitary by delivering steady sanitizer levels with minimal manual dosing. They come in inline (installed in the return line) and offline (connected to piping) configurations, offering different flow impacts and installation needs. The right feeder supports the pool’s size, plumbing, and climate, while providing simple controls to adjust dosing. This guide highlights five top options that balance reliability, ease of use, and compatibility with common inground setups, helping you pick a feeder that maintains water quality with minimal hassle.
| Product | Brand | Type | Approx. Capacity / Tablet Type | Notes |
|---|---|---|---|---|
| Pentair Rainbow 320 Inline Feeder | Pentair | Inline | Not specified | Permanent installation in return line; standard 2″ slip PVC fittings with adapters for 1-1/2″ |
| XtremepowerUS | Offline | 9 lb tank; supports 3″ Trichlor or Bromine tablets | Includes installation kit; easy access via threaded cover; durable resin body | |
| XtremepowerUS | Inline | 3″ slow-dissolve tablets | Dial control valve for adjustable feed; installed in return line after heater and filter | |
| Edovaf | Inline | 9 lb capacity | Fittings for 2″ pipe; finger-release latch; replacement for Hayward CL200 style units | |
| Vikua | Inline | 11 large or 98 small tablets; supports a wide range of pool sizes | Compatible with Pentair Rainbow 320; includes vent plug and bottom drain |
Pentair Rainbow 320 Inline Feeder
The Pentair Rainbow 320 inline feeder is designed to dose chlorine or bromine directly in the return line, supporting a permanent installation in both new and existing pools or spas. Its inline architecture minimizes clutter near equipment pads while integrating with standard 2-inch slip PVC fittings and adapters for 1-1/2-inch piping. The unit’s design eliminates the need for special venting, reducing installation complexity in typical residential settings. As part of a Rainbow 320 ecosystem, this feeder offers dependable control over sanitizer delivery for steady water balance in inground pools.
Maintenance is straightforward, thanks to a sealed, in-line dosing system that helps ensure consistent chemical delivery. With a return-line installation, the feeder relies on your pool’s circulation to distribute sanitizer evenly, supporting uniform chlorination across the basin. The model is particularly suitable for standard 2-inch piping configurations commonly used in American inground pools, delivering reliable performance with limited ongoing adjustments. This feeder is a practical upgrade for pool owners seeking hands-off chlorine management without sacrificing water quality.
XtremepowerUS Offline Automatic Chlorinator
The XtremepowerUS Offline Automatic Chlorinator is designed for installations where inline placement is not feasible. Connected directly into the pool’s piping, this feeder minimizes water-flow restrictions compared with inline models while still delivering automatic dosing. It features a 9-pound tank capable of holding slow-dissolving 3″ Trichlor chlorine or Bromine tablets, providing extended dosing intervals between refills. A heavy-duty resin body ensures durability in outdoor pool environments, and the threaded cover offers secure, simple access for tablet loading and maintenance.
The unit includes a dial control valve that lets pool operators set the feed rate to match the pool’s size and sanitizer demand, enabling consistent water quality with less manual intervention. An installation kit is provided to ease setup, and the overall design emphasizes long-term reliability and straightforward upkeep. While backyard plumbing varies, this offline feeder can be a solid choice for inground pools where inline installation would be impractical or would require extensive piping changes.
XtremepowerUS Inline Automatic Chlorinator
The XtremepowerUS inline chlorine feeder is designed for installation in the pool water return line, typically after the heater and filter. Its inline design makes installation quick and unobtrusive, integrating directly into the existing piping without altering major flow paths. The unit is fully adjustable via a dial control valve, allowing operators to regulate how quickly chlorine or bromine tablets dissolve and enter the water. It accepts 3-inch slow-dissolve tablets, enabling balanced dosing for a range of pool sizes while maintaining water clarity and sanitization.
This feeder emphasizes simplicity and control: a compact footprint, easy access to the dosing mechanism, and adjustable flow to respond to seasonal changes in bather load or weather. The inline configuration makes it a practical option for inground pools with standard return lines, offering reliable automation without the need for extensive plumbing modifications. Regular checks of the valve and fittings will help sustain consistent sanitizer levels over the pool season.
Edovaf CL200 Inline Chlorinator
Edovaf’s CL200 inline Automatic Pool Chlorinator targets both above-ground and inground pools, providing a robust option for inline dosing directly in the return line. Built with heavy-duty resin, the unit includes 2-inch pipe fittings to fit most standard installations, and its inline design supports continuous dosing without adding extra valves to the main line. The CL200 is positioned as a practical replacement for Hayward CL200 or similar inline feeders, offering compatibility and straightforward integration into existing systems.
Dosing control is achieved with a dial valve that adjusts the rate at which chlorine tablets dissolve and enter the water. A finger-release latch on the top facilitates quick, secure loading, reducing the chance of tablet spills during maintenance. This combination of durable materials, adjustable flow, and convenient loading features makes the CL200 a versatile option for mid-range inground setups that demand reliability and easy upkeep for ongoing pool sanitation.
Vikua 320 Inline Chlorinator
Vikua’s upgraded 320 inline feeder is designed to work with Pentair Rainbow 320 systems, delivering a dependable inline dosing solution for inground pools. The closed-system design helps manage fumes and maintains consistent sanitizer delivery. The unit can hold 11 large or 98 small tablets, supporting longer dosing intervals for mid-sized to large pools, and is compatible with a wide range of pool sizes. This flexibility makes it a practical upgrade path for owners expanding their equipment beyond older feeders while maintaining reliable chlorine or bromine delivery.
The 320 feeder features a well-designed control valve for precise flow management, a bottom drain for easy removal of residual liquids, and a feed hose plus top vent plug to support proper dissolution and venting. A reinforced base and UV-resistant materials help ensure long-term performance in outdoor environments. For inground pools with moderate to high sanitizer demand, the Vikua 320 provides steady dosing with relatively simple maintenance when matched to pool size and circulation patterns.
Buying Guide
Inline versus Offline Feeders
Inline feeders are installed in the pool’s return line to dose water as it circulates back to the pool. They can offer seamless integration with existing systems and typically require less additional piping, but they rely on consistent water flow to ensure even distribution. Offline feeders connect to the piping network but are not located directly in the return line, which can reduce restrictions in some setups. They may require extra fittings or clamps and can be easier to install in complex plumbing, yet they may demand more careful pipe routing to avoid flow bottlenecks.
Pool Size and Capacity
Matching feeder capacity to your pool size is key. Many models list tablet counts or gallon ranges; for example, feeders that handle 72,000 gallons or larger can service mid- to large inground pools, while smaller units are better suited to compact residential layouts. Tablet type (3-inch slow-dissolve, solid tablets, or bromine options) also influences dosing intervals. When in doubt, size the feeder to cover your pool’s weekly chlorine demand, with some extra capacity for seasonal peak usage.
Installation and Maintenance
Consider installation complexity and ongoing maintenance. Inline units require accurate placement in the return line and may necessitate shutting off the system during installation. Offline feeders demand additional piping connections but can minimize flow restrictions in some configurations. Maintenance typically involves refilling tablets, checking the dosing valve, and periodically cleaning any residue from the tray or gasket. Choose models with easy-access lids, secure latches, and durable materials to minimize service time.
Materials and Durability
Most feeders use ABS, UV-resistant polypropylene, or heavy-duty resin housings designed for outdoor exposure. Durability matters because feeders remain in place across seasons, exposed to sun, temperature swings, and pool chemicals. A robust base, corrosion-resistant control valves, and reliable seals reduce leaks and dosing variability. If your climate includes intense sun or freeze-thaw cycles, prioritize UV-stable components and secure mounting options to prevent warping or cracking.
Safety, Calibration, and Compatibility
Safety features such as finger-release latches on the cap, venting considerations, and secure covers help prevent accidental tablet spills. Calibration control valves should be precise and easy to adjust to avoid over- or under-dosing. When selecting a feeder, check compatibility with your pool brand’s existing equipment or any replacement parts, such as Hayward or Pentair units, to ensure straightforward installation and reliable performance. A feeder that aligns with your current system reduces risk and simplifies maintenance over time.
Brand Support and Warranty
Brand reputation matters for long-term reliability. Look for feeders with readily available replacement parts, a transparent warranty, and responsive customer support. Some brands provide installation kits and detailed instructions that ease setup and future servicing. If you operate multiple pools or plan upgrades, consider models with modular components or compatibility across a family of feeders, which can help streamline maintenance and parts sourcing.