Hayward 20203 Rotary Flow Switch – RFO | Commercial Pool Flow Sensor for CAT Controllers

Protect your commercial pool system with the Hayward 20203 Rotary Flow Switch (Model RFO).
This rugged, highly accurate flow sensor monitors water movement in real time to ensure proper circulation before enabling chemical feed operations. Designed specifically for use with Hayward CAT 2000, CAT 4000, and CAT 6000 controllers, it plays a critical safety role in preventing chemical overfeeding during pump failures or low-flow conditions.

The RFO uses a rotating paddle wheel to detect flow and features a durable plastic housing for long-lasting performance in harsh aquatic environments. It installs easily into standard plumbing configurations and connects directly to compatible CAT controller inputs.

Ideal for aquatic centers, hotels, fitness clubs, and municipalities, the 20203 Rotary Flow Switch ensures your pool stays safe, balanced, and compliant.