Morrison Bros 748A-3200 AV 3" FNPT Pressure Vacuum Vent - 20.2k SCFH Venting capacity 2.5 P.S.I. Foot Valves and freezing rain can cause

and freezing rain can cause moisture to enter the vent and freeze which can restrict internal movement of vent mechanisms and block air passages

A tight fill connection is required for the valve to operate

Lifetime Tracking‚ 5-digit non-resettable counter tracks total volume transferred over lifetime of meter

-40°F to +120°F (-40°C to +49°C) Continuous service

Morrison Bros 748A-3200 AV 3" FNPT Pressure Vacuum Vent - 20.2k SCFH Venting capacity 2.5 P.S.I. Foot Valves and freezing rain can causePressure vacuum vent designed for installation on top of the vent pipe of an aboveground or underground storage tank. Poppets seal vapors in the tank when pressure is equalized. The vent allows the tank to breathe during filling and dispensing operations. This vent must be used in conjunction with an emergency vent. It is recommended that the opening pressure setting is set below that of the emergency vent so the normal vent operates first. Settings