How to Quickly Separate Water from Diesel Fuel?

[VonAlex]

At normal temperature and pressure, the density of diesel fuel is lower than that of water, allowing the mixed solution to settle. Place the container on a flame to heat it. The principle is that the boiling point of water is much lower than that of diesel fuel.

[OMaya]

Seeing water in diesel fuel, my approach to handling this is quite practical. First, stop using the fuel tank and avoid starting the engine to prevent accidental damage. Find a clean, large container, pour the diesel into it, and let it sit for several hours to a full day. Since water is denser, it will naturally settle at the bottom and can be drained out. During this time, avoid adding any chemicals hastily, as that might make the water harder to remove. Once the water has settled, carefully drain it from the bottom of the container and check the diesel's condition. If there's too much water, it's advisable to filter the remaining diesel or use professional separation tools—don't mix it carelessly. I've seen a friend directly drain water from the fuel tank, but that's risky and can lead to leaks. Be patient throughout the process; rushing isn't worth the potential repair costs. Safety comes first. Also, always check the seal of the fuel container before refilling to avoid future hassles.