Pressure tested the fuel tank up to 15" H2O. No leaks so far. I left the tank pressurized when I went home. If the pressure would rise to much the water will overflow on the left side so that the pressure in the tank will not be higher than 22" waterpressure.
When I came back in the morning the pressure in the tank was 2,5"/63mm higher. Pressure differential equals 7millibar. That was the exact pressure drop during the night. Feels good ;-)
