diesel fuel in fresh water tank

[Short]

Has anybody ever experienced this? Any suggested fixes?

[dalej]

This has got to be a trick question!

I would not think that it's possible that could happen.... no wait, has the taco twins been close to the bus?

Sorry, I don't have a clue how this could of happened.

[Jon Wehrenberg]

Ditto what Dale said.

The bus fuel system is tapped into by the generator, the Webasto (or Espar or Aquahot) if so installed, and of course the motor.

We can rule all of those out because none of them ever bring their fuel supply anywhere near or connected to the fresh water supply.

The only bus system cross contamination with the fresh water system is engine coolant or fluid breaching the heat exchanger into the house water system, but since the house water system is pressurized to a much greater amount than the engin e coolant system, the cross contamination would be the fresh water getting into the coolant.

[Ray Davis]

Could someone have put diesel into the fresh water fill spout? Would probably be evidence/stain in that area if that did happen.

[Jon Wehrenberg]

I've never seen a diesel fuel nozzle with a hose adapter. On my coach there is no way to "accidently" get fuel into the water. You not only need a hose connection, but you have to open a valve manually and then press a switch to open the electric fill valve.

As an alternative my bus has an expandible plug at the top that can be removed to add chlorox or even to fill from a hose, but a person needs to get into the bay, open the access door to the inside of the bay, actually know that plug is there, and to remove it which is a bit of a pain.

If fuel is in the system My guess is that step one has to be a full system drain. Second refill and flush with some soap or solvent that will emulsify the fuel so it can be carried away. Then that needs to be flushed with many rinses. But I wouldn't waste my time doing that until I knew the secret to how it got there in the first place.

[Ray Davis]

On Marathons, in the curb-side water bay there is a fresh water gravity fill. It could conceivably receive fuel, but as you've said, it seems a real long shot. I think my fill there is like plastic PVC, and I would think there would be evidence that diesel fuel had been introduced there.

The original post didn't seem to indicate whether there is a LOT of fuel in the water, or not.