Inline pool chlorinators provide a convenient, hands-off way to keep pool water sanitized. This guide highlights five inline or highly compatible chlorinators that fit a range of pool sizes and setups. Suitable buyers include above-ground and in-ground pool owners, DIY enthusiasts, and those seeking low-maintenance water care. The table below summarizes the five selected products and key fit notes to help you compare at a glance.
| Product | Best For | Capacity | Notes |
|---|---|---|---|
| Hayward CL200EF In-line Automatic Chemical Feeder | Owners upgrading from older Hayward models | 9 lb | Dial feed rate, Easy-Lok access |
| HYDROTOOLS By SWIMLINE 8750 In-Line Feeder | Medium to large pools needing steady output | 5 x 3″ tablets | Solar accent option, adjustable output |
| Pentair Rainbow 320 Automatic In-Line Feeder | Custom installs in new or existing lines | 9 lb equivalent | Standard 2″ slip PVC connections |
| SWIMLINE HYDROTOOLS 87501 Economy In-Line Feeder | Budget-friendly, universal compatibility | 4.2 lb | 360° adjustment dial for easy tuning |
| MAYGO CL200 In-line Pool Chlorinator | Replacement for Hayward CL200; DIY installs | 9 lb | 360° control knob; note on connector sizing |
Hayward CL200EF In-line Automatic Chemical Feeder
The Hayward CL200EF is designed for inline tablet feeding with both large and small slow-dissolving tablets. It features an updated model for the CL200, a dial control valve for easy feed-rate adjustment, and an Easy-Lok threaded cover for safe, convenient access to add tablets. Best for: pool owners already using Hayward equipment who want a simple, adjustable inline feeder. Caution: verify thread compatibility with your existing plumbing before installation.
HYDROTOOLS By SWIMLINE 8750 In-Line Chlorine Feeder
The Hydrotools 8750 is a premium inline feeder designed to hold up to five 3″ chlorine tablets and offers a sunny, solar-powered accent option for poolside appeal. Best for: larger pools needing longer intervals between refills and a robust automatic distribution. Caution: tablets are not included, so stock tablets separately.
Pentair Rainbow 320 Automatic In-Line Feeder
The Rainbow 320 supports permanent installation in the return line and comes standard with 2″ slip PVC fittings with adapters for 1-1/2″ connections. Best for: homeowners planning a permanent, reliable inline setup with flexible piping. Caution: ensure compatible line size before purchasing adapters.
SWIMLINE HYDROTOOLS 87501 Economy In-Line Feeder
The 87501 offers an economical solution with an integrated 360° adjustment dial, allowing easy output customization. Best for: budget-conscious buyers needing straightforward inline chlorination. Caution: capacity is smaller than premium models, so plan for more frequent tablet refills in larger pools.
MAYGO CL200 Performance Replacement
The MAYGO CL200 serves as a performance replacement for the CL200 with a 9 lb capacity and a 360° omnidirectional control knob for precise flow control. Best for: owners seeking a compatible upgrade for existing CL200 setups. Caution: external thread sizing differs from some CL200 variants; confirm connector compatibility before installation.
Buying Guide: Inline Pool Chlorinators
How to choose the right inline chlorinator depends on pool size, plumbing, and maintenance goals. Key considerations include capacity, compatibility with tablet sizes, ease of installation, and control accuracy. Inline feeders should match the pool’s turnover rate and be compatible with the existing pump and filter setup.
Match To Pool Type And Size
- Small to medium above-ground pools: consider feeders with lower capacity (4–6 lb) and straightforward adjustment dials.
- Large in-ground pools: prioritize 9 lb capacity or higher and robust control options for stable dosing.
- New installations: choose feeders with standard slip fittings and flexible adapters (2″ or 1-1/2″ layouts).
Chlorinator Output And Tablet Type
- 3″ tablets extend refill intervals but may require larger feeders and secure tablet retention.
- Small dissolving tablets minimize clogging but demand precise dosing and more frequent refills.
Installation And Maintenance
- Look for Easy-Lok covers or tool-free access for tablet addition and cover removal.
- Check for universal compatibility with both Hayward and Pentair lines if you mix brands.
FAQ
- What is an inline pool chlorinator?
It is a device installed in the return line that automatically dissolves and distributes chlorine tablets into pool water. - Can I use any chlorine tablet?
Most inline feeders accept standard 3″ or smaller tablets; always verify the feeder’s tablet size compatibility. - How do I adjust chlorine output?
Use the built-in dial or control knob to increase or decrease tablet dissolution rate. - Is installation difficult?
Many inline feeders offer straightforward installation with common PVC fittings; some require plumber-grade connections. - What maintenance is required?
Regularly check tablet supply, ensure seals are tight, and inspect for leaks or clogs in the dosing path. - Which feeder is best for a budget setup?
Economy models provide basic dosing with adjustable output but may have smaller capacity.