Hayward CL220 Off-Line Automatic Chemical Feeder

Hayward’s CL220 Off-Line Automatic Chemical Feeder is a high-capacity tablet chlorinator that automatically dispenses chlorine or bromine into your pool water, reducing manual chemical handling and keeping sanitizing levels more consistent. Designed for off-line installation, it taps into your existing plumbing with small inlet and outlet lines rather than being cut directly into the main return line, which makes it ideal for retrofits and tight equipment pads.

Key features and benefits

Off-line automatic feeder for in‑ground and many above‑ground pools, great for new installs or aftermarket upgrades.
Uses large or small slow‑dissolving Trichlor tablets or sticks, and is also compatible with bromine tablets.
9 lb tablet capacity (up to about eighteen 3‑inch tabs) for extended run time between refills.
Dial control valve with multiple settings for easy, precise feed‑rate adjustment based on pool size, temperature, and bather load.
Easy‑Lok threaded cover with chemical‑resistant X‑ring/Viton‑type seal for secure closure, easy access, and long service life.
Unique finger‑release catch adds extra safety by helping prevent accidental lid removal under pressure.
Corrosion‑resistant ABS body built for durability in outdoor equipment pads.

Specifications

Model: Hayward CL220 (CL220EF / Open Line variant, 9 lb capacity).
Type: Off‑line automatic chlorine/bromine feeder for pool return lines.
Chemical capacity: 9 lbs of slow‑dissolving Trichlor or bromine tablets/sticks (up to ~18 of the 3" tablets).
Application: In‑ground pools; also used on some above‑ground systems where off‑line plumbing is preferred.
Construction: ABS thermoplastic canister with high‑quality chemical‑resistant seal (X‑ring/Viton style).
Approximate dimensions: about 15½–15⅝" high by about 8⅛–8¼" wide (canister body).

Installation and use notes

Installs after the filter and after the heater on a bypass loop, using small tubing and saddle clamps into the return plumbing.
Suitable for pools up to roughly 40,000 gallons with a single CL220; larger pools may use more than one feeder in parallel.
Always use one sanitizer type at a time—never mix different tablet types inside the feeder, as this can cause dangerous reactions.
Continue to test water regularly with strips or a test kit and fine‑tune the dial setting as seasons and bather load change.

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