The Protectoseal Series 5200G Free Vent provides open access to the tank’s vapor space and provides pressure and vacuum venting. Flange connection mounts to tank’s roof nozzle. Opening is protected by removable weatherhood. Protective mesh screen is also provided to minimize the possibility of debris entering the tank opening while allowing access to the tank’s interior through roof nozzle for inspection, measurement, etc. For larger sizes or for raised face flanges refer to Series 5200D, or contact factory for details.