Fig. 244 Emergency Vent Makeover


The design of our Fig. 244 Emergency Vent is undergoing a makeover. The Morrison emergency vents, that our customers have been buying for years, will soon look a little different. Rest assured that the quality and value that these vents, and all Morrison products have embodied for years, is not changing. The most notable difference in the new design is that the heavy cover, which has been dome-shaped for many years, is now going to be flat. The body portion of the newly design vents saw very little change from the old model. Please see the examples below (Old design on left, new design on right).


FIG 244 Old DesignFIG 244 New DesignULC Logo


In addition to the visual differences, here are some other changes to note:

  • All sizes and styles of the 244 Series Emergency Vent are now UL and ULC Listed
  • The FKM O-Ring seal is now easily replaceable
  • The flow ratings (cfh) for nearly all sizes of the new design have increased. The 4" size vents saw a slight decrease. As tested in a third party lab and verified by UL
  • The vent covers will have the same great powder coat finish
  • All of our parts numbers will remain the same to avoid confusion and the need to update your computer systems


Again, please be assured that our new design meets the same standards for quality and value for which our products are known. If you have questions or concerns, any of our customer service people will be happy to assist you at (800) 553-4840 or


Meet our Domestic and International Sales Team.

Domestic Sales
International Sales


Product Literature

View and download Morrison product catalogs and literature.

See All Product Literature


CARB Certification

Morrison Bros. Co. has received approval from California’s Air Resource Board for a Phase 1 Enhanced Vapor Recovery System for Protected Aboveground Storage Tanks. Click here to get started on your CARB certification!

Copyright © 2020 Morrison Bros. Co. ® - All Rights Reserved.