A supplemental vent designed for installation in tank vehicle vapor recovery system to provide venting protection in the event the vapor recovery system should be closed or blocked while bottom loading. This vent mounts to a 4” TTMA flange.

• Easily installed
• Adds tank protection
• Thru area – six square inches
• Opening Pressure: 1 psig
• Venting Capacity Air: 51,000 cu. ft. hr./3 psig