| Waterman Model AV-150 Air Vents are designed for evacuation of air when filling a pipe line and provide positive vacuum relief when pipe is draining. Use on gravity or higher pressure systems. The Model AV-150 uses a semi-hard, precision ground, inert solid plastic float ball. The aerodynamic “air-flow” design of a high strength alloy aluminum body and full baffle assures maximum vent capacity without premature closing. Material selection prevents “sticking” in the closed position. The AV-150 is available in 1 ½ inch to 4 inch diameters.
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