Looking for an automatic chlorinator for an inground pool? This guide highlights five dependable options that balance ease of use with steady sanitation. Ideal buyers include homeowners seeking low-maintenance chlorine dosing, pool technicians stocking reliable inline feeders, and seasonal pool owners aiming for set-and-forget operation. Below, compare capacity, installation style, and control features to pick the best fit for your pool size and maintenance routine.
| Product | Capacity | Installation | Best For |
|---|---|---|---|
| Hayward CL200EF Inline Chlorinator | Up to 9 lb | Inline, offline | Mid-to-large residential pools needing consistent chlorine dosing |
| SeaSlep Off-Line Automatic Feeder | 9 lb | Off-Line, inline-ready | Hands-off operation and easy dial tuning |
| CRESTWAVE 320 Inline Feeder | Up to 11 large tablets | Inline, compatible with many systems | Large pools requiring flexible top/bottom feeding |
| MAYGO CL200 Inline Automatic Chlorinator | 9 lb | Inline, configurable | Replacement option with broad compatibility |
| Hayward CL220EF Off-Line Feeder | 9 lb | Offline, enclosed | Quiet operation and safe access for tablet loading |
Hayward CL200EF In-Line Automatic Chlorine Feeder
The Hayward CL200EF provides automatic, offline chlorination for inground pools, delivering consistent chlorine distribution with minimal manual adjustment. It holds up to 9 pounds of tablets, enabling longer intervals between refills for steady sanitation in residential systems. The housing is corrosion-resistant, designed to withstand pool chemicals and outdoor exposure. This feeder is best for homeowners seeking reliable, low-maintenance chlorine dosing with straightforward setup.
Best for: medium-to-large inground pools that require steady, hands-off chlorine delivery. Note: installation may involve plumbing integration with your existing return line.
Hayward CL220EF Off-Line Chemical Feeder
The CL220EF is an off-line, fully enclosed chlorinator designed for safe, fumes-free operation. It features an Easy Lok threaded cover for convenient tablet loading and does not require special venting. This makes it a solid choice for users who prioritize simple maintenance and a compact footprint in smaller equipment spaces. Best for: pool setups needing a tidy, enclosed dosing solution with straightforward access.
Limitation: off-line design means it may require separate plumbing integration and may be less visible during routine checks.
SeaSlep Off-Line Automatic Chlorinator
The SeaSlep automatic chlorinator provides 9 pounds of capacity with an adjustable 360° control knob, allowing precise slow-to-fast chlorine dissolution. It is designed to dissolve and distribute chlorine continually, which can help keep water balanced during vacations or extended pool use. Best for: users who want effortless, adjustable dosing with quick setup. Limitation: may require periodic recalibration when changing pool usage patterns.
Pentair Rainbow Model 320 Tablet Feeder
The Rainbow Model 320 offers a tablet feeder solution with 1 or 3 tabs, compatible with standard tablet dosing. It is positioned as a straightforward option for pool owners seeking a simple, dependable way to dispense chlorine. Best for: smaller to mid-size pools that prefer a basic, ready-to-use feeder. Caution: ensure compatibility with your existing system and tablet type before purchasing.
CL200 Inline Chlorinator Replacement (Edovaf)
This inline chlorine feeder is designed as a replacement for Hayward CL200EF/CL200 and can handle pools up to 40,000 gallons with a 2-inch outer spiral and 1-1/2 inch inner spiral. It offers a dial-controlled feed rate and a safety latch for easy operation. Best for: upgrading an older system or needing a compatible inline chlorinator with easy-to-adjust dissolution rates. Limitation: ensure thread and connection compatibility with existing plumbing.
MAYGO Inline Automatic Chlorinator (CL200)
The MAYGO CL200 is an inline automatic pool chlorinator that distributes chlorine from tablets to maintain water cleanliness. It features a 360° control knob to adjust feed speed, and is designed for in-line installation. Best for: pools needing adjustable dosing and a compact inline form factor. Limitation: external thread compatibility differs from CL200—verify with your setup before buying.
Buying Guide: Key Purchase Considerations
- Pool size and turnover: Choose a feeder with capacity aligned to your gallons-per-week usage to avoid frequent refills.
- Installation style: Inline feeders integrate into the return line; offline feeders sit separately but still feed chlorine into the flow. Consider space and plumbing compatibility.
- Control and adjustment: Look for dial or knob controls for easy dose tuning. Some models offer 360° adjustability for precise dissolution rates.
- Safety and maintenance: Enclosed designs reduce fumes exposure. Reputable materials (ABS, corrosion-resistant housings) extend longevity in chemical environments.
- Compatibility: Check for compatibility with the chlorine or bromine tablets you plan to use, and confirm thread sizes and hose connections match your system.
Frequently Asked Questions
- What size inground pool is best for an inline chlorinator?
Inline feeders are well-suited for mid-to-large inground pools, typically in the 20,000–40,000+ gallon range, depending on tablet strength and turnover rate. - Can I use any chlorine tablet with these feeders?
Most feeders are compatible with standard chlorine tablets or sticks, but verify tablet size, weight, and dissolution rate with the feeder’s specifications. - Do these feeders require special venting or safety precautions?
Offline feeders generally do not require venting, but always follow the manufacturer’s installation and safety guidelines to prevent chemical exposure and ensure proper operation. - Is a higher-capacity feeder always better?
Not necessarily. A feeder with excessive capacity can lead to over-dosing if not properly tuned; choose a model with a controllable feed rate appropriate for your pool volume. - What maintenance is required for automatic chlorinators?
Regularly check for blockages, ensure O-rings and seals are lubricated, and verify feed rates after any pool chemical changes or seasonal shifts. - How do I know which feeder to choose?
Consider pool size, existing plumbing, preferred installation type (inline vs offline), ease of adjustment, and whether you prioritize safety features and longevity.