condensation on bottom of fuel tanks

Question

Since it is fairly warm out I went out and was walking around the MH seen some wet spots under MH, bent down the bottom of the fuel tank water dripping of. Is this condensation due to the weather, I have not seen this before. I rained a couple days ago it is wet in places under the MH, but you can see the water bubbles on the tank.  Roy

ivylog · Answer

Cold fuel tank and warmer moist air equals condensation. It's doing the same thing on the inside if the tank is not full and why you hopefully stored it full of fuel.

wolfe10 · Answer

And, if the tank is not full, the same thing will be happening INSIDE the tank. That is when the temperature of the tank falls to the dew point of the air in the tank, CONDENSATION.

That is why you always store a coach (gas or diesel) with a full fuel tank.

roybuck · Answer

I filed it up when I parked it, I have exercised the Generator used maybe  5 Gal. It is also parked on a concrete slab.. Thanks  Roy

dale_traveling · Answer

Acting just like a can of cold beverage. The volume of fuel in the tank is going to take much longer to warm, being tucked up under the coach, then the air around it.

haddy1 · Answer

The same thing is happening to your engine block and oil pan.  I could never keep the rust off the oil pan on my previous coach with a Cat engine.

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condensation on bottom of fuel tanks

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