Re: About to make my first fuel tank
Ask away Mr.B..... valid questions and yes, helpful questions.
Ill try and answer those questions until better advice comes along....
The proper way to test a fueltank is pressure testing. Make a cap so that you can attach an air lead and pressurise the tank and submerse it in water and watch for the bubbles.
And as far as sealing petcocks and fittings would be maybe thread tape or some fuel resistant silicone or something.
I hope my answer is right and hope it helps. And good luck