Today for some strange reason, I am having no luck with finding a distributer of Tank Vents.
The vents needed are of the bell shape, either cast aluminum or brass/bronze. They have a floating ball to stop water from entering in the reverse direction and are also equipped with flame screen for fuel tank applications.
These vents are commonly used in marine applications such as tug boats, ships, oil rigs.
Generally this is simply a shipyard item, but not today. if anyone out there has sourced these in the past, your help would be appreciated.