Dial ¼” Heavy Duty Brass Float ValveThe Evaporative Cooler Brass Float Valve performs a vital function in your evaporative cooler. Too little water creates dry spots in the cooler pads. Too much water causes an overflow condition. The Brass Float Valve prevents these unwanted conditions by ensuring a constant water level and dependable valve shut off. Compression Heavy Duty Brass Body, Plunger, Arm & Stem 2 Piece Arm with Adjustable Screw Polypropylene Float