Hayward Automatic Chlorine Feeder CL100 - 3-inch Tablet In-Line Metering, Adjustable Flow

The Hayward CL100 is a compact, automatic chlorine feeder that dispenses 3-inch tricolor tablets to maintain pool sanitizer levels with adjustable flow and minimal upkeep.

The CL100 from Hayward is a corrosion-resistant, in-line chemical feeder designed to work with your existing pump and filter circuit. Built for straightforward DIY installation, it meters chlorine or bromine into circulation based on a dial-controlled valve. Constructed for durability and safety, the unit reduces the need for daily manual dosing while keeping tablet handling contained.

How does the Hayward CL100 feed chlorine into my pool system?

The CL100 mounts directly in the return plumbing and uses the pressure of the circulation system to dissolve tricolor tablets at a controlled rate. A rotary dial valve lets you increase or decrease feed output so you can match sanitizer delivery to pump run time and pool size.

• Accepts 3-inch tricolor sanitizer tablets (chlorine or bromine)
• Dial control valve for precise feed adjustment
• Installs in-line with standard plumbing using simple fittings

What safety and convenience features does it include?

The unit’s Easy-Lok threaded cover and finger-release catch keep tablets secure while allowing quick access for refills. The body is built of corrosion-proof materials to resist chemical wear, and the design minimizes direct contact with tablets during servicing.

• Easy-Lok threaded cover for safe, fast tablet replacement
• Finger-release catch adds an extra layer of security
• Corrosion-resistant construction for long service life

Is the CL100 difficult to install or maintain?

The CL100 is made for homeowners who prefer a straightforward, do-it-yourself installation. Routine upkeep mainly involves occasional addition of 3-inch tricolor tablets and periodic inspection of the valve and O-rings; there are no complex electronics or frequent calibration steps.

• Simple plumbing installation suitable for DIYers
• Low maintenance: refill tablets and check seals as needed
• No electrical hookup or programming required

Which pool or spa setups are best suited for this feeder?

This feeder is ideal for smaller to medium residential pools or spas where steady, metered sanitizer delivery is preferred. It pairs well with routine chemical programs and traditional filtration systems; adjust the dial to match pump run hours and swimmer load.

• Works with both chlorine and bromine 3-inch tablets
• Best for single-family pools and backyard spas
• Compatible with most pump-and-filter plumbing arrangements

Who is this for: The Hayward CL100 suits pool owners who want a low-fuss way to maintain sanitizer levels without electric controllers or daily manual dosing. It’s a practical choice for DIY installers, property managers of small residential pools, or anyone seeking a durable, in-line feeder that blends safety, adjustability, and corrosion-resistant construction.