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Pressure Vacuum Vent
One Year Manufacturer Warranty

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Morrison Brothers 748A--1100 AV Pressure Vacuum Vent

2 in. NPT, 12oz/sq.in., Brass Internals w/Dryer Conn

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Model # Description Price Qty
748A--1100 AV 2 in. NPT, 12oz/sq.in., Brass Internals w/Dryer Conn $391.95
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Morrison Brothers 748A--1100 AV 2 in. FNPT, Pressure Vacuum Vent
Manuals and Information:
Specification Sheet

Pressure 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 are approximate.

Standard Features
  • Vents outward and upward in compliance with NFPA 30
  • Tri-polar mounting screws for mounting exhaust hood in any of three positions
  • Optional dryer connections accommodate the installation of desiccant dryers on vacuum connection
  • Optional pressure discharge hood facilitates piping pressure relief to desired discharge point
Construction Details
  • Aluminum body and hood
  • Brass poppets and seats
  • Stainless steel screens