The L&J Technologies 94241 Free Vent is a hooded tank vent designed for use on bulk liquid storage tanks containing non-volatile liquids. It is also used on vent riser pipes where an open atmospheric venting point requires basic protection from environmental debris.
As a free vent, the 94241 is intended to allow atmosphere and vapors to flow freely while helping prevent rain, dirt, birds, insects, and other foreign matter from entering the storage tank or vent opening. The hooded design supports straightforward installation and access for routine maintenance.

The 94241 Free Vent is available in multiple sizes from 2” through 30”, with base configurations designed to fit 125/150 lb ANSI flat face flanges and selected API flange applications.
Available material options include steel, aluminum, and stainless steel, with additional flange connections available on request.
For facilities evaluating tank venting accessories, the L&J Technologies 94241 provides a practical hooded free vent option for atmospheric venting applications involving non-volatile liquid storage.
Key Characteristics
- Hooded free vent for atmospheric tank venting applications
- Designed for bulk liquid storage tanks containing non-volatile liquids
- Suitable for use on vent riser pipes
- Helps reduce entry of rain, dirt, birds, insects, and other foreign matter
- Allows atmosphere and vapors to flow freely
- Available in sizes from 2″ through 30″
- Base fits 125/150 lb ANSI flat face flanges
- Selected API flange configurations available for larger sizes
- Available in steel, aluminum, and stainless-steel construction
- EN1092-1 and JIS flange connections available on request
Ideal Applications
- Bulk liquid storage tanks containing non-volatile liquids
- Atmospheric tank vent openings
- Vent riser pipe installations
- Storage tank applications requiring a hooded free vent
- Locations where tank openings need protection from weather, insects, birds, and debris
Industries Served
- Oil and Gas
- Chemical Processing
- Pulp and Paper
- Wastewater
- Food and Beverage







