The Dial 1-1/2 in. H X 3-1/4 in. W Green Bronze Evaporative Cooler Float Valve is a critical component designed to ensure consistent water levels in evaporative cooling systems. The evaporative cooler heavy duty 1/4 in. brass float valve prevents unwanted conditions by ensuring a constant water level and reliable valve shut-off. The inclusion of a 2-piece arm with an adjustable screw and a polypropylene float allows for precise water level adjustments, ensuring a reliable valve shut-off.