When the internal tank pressure falls, the cover automatically lowers back onto the body and is automatically reset.
UL Listed emergency vent (pressure relief only) used on above ground storage tanks, as a code requirement, to help prevent the tank from becoming over-pressurized and possibly rupturing if ever exposed to fire.
The vent must be used in conjunction with a “normal vent.”
- Automatically resets after opening
- Durable powder coated cast iron cover