I rewatched vans webinar posted on the eaa site, Rian Johnson said the tanks were leaked checked at the factory using professional leak detection equipment same as would be used by a certified aircraft manufacturer...seems like that should be better than anything I could do.
I agree but they also say to test. If you discover a leak they are not responsible.
 
I rewatched vans webinar posted on the eaa site, Rian Johnson said the tanks were leaked checked at the factory using professional leak detection equipment same as would be used by a certified aircraft manufacturer...seems like that should be better than anything I could do.
Trust but verify
 
You definitely don't want to deal with a leaky tank after it's been installed and painted. Ask me how I know. 😬🤣
 
How does the factory leak test the tanks without the fuel fittings and access plates installed and sealed with fuel tank sealant?