Left fuel tank tested ok:)

I used a tube with water to get approx 1 psi of pressure (1 psi = 27 inches of water). At the first the pressure decreased slightly, but after taping the fuel filler cap and tightening the hose clamps it looked good. I let it stay overnight, and the column had only decreased 20 mm. But the atmospheric pressure had increased 2 hPa at the same time frame. So I considered it as a success😊

I also noticed that the pressure in the tank is very sensitive to temperature. As I started working in the shop and the temperature increased a bit, the water column climbed up some 15-20 mm quite fast.