re: Boat Fuel Tank - Pressure Testing

What I did to test a 100 gallon tanks was set it off the ground about a foot. Fill it with water, then I used a piece of PVC piping that was 16' long and 2" wide, connected that to the fill and having it standing straight up and filled that with water. Been a long time, but if I remember right, a gas tank needs to be tested up to 6 psi. By going up that height with the pipe, that gave the tank a 8 psi head pressure.

Another way, fill the tank with water. Block off the fill. Hook up a line with a gauge and a air valve and hook up a compressor with a shut off valve. Bring the pressure up to 8 psi, close the valve and let it sit for a few hours.

By all means, this is NOT CG approve. But for you to feel safe, it will work. Also, if using a compressor, DO NOT go OVER 8 PSI.

Drain the tank of the water and add about a 1/2 gallon of Denature Alcohol when you fill it with gas. Also keep eye, drain any fuel filters as needed.