Originally Posted by X New Yorker
I think the water I will use it pretty important and I have already had to tell a couple of gas station attendents - hands off!
Part of the problem there is that the fuel filler is hidden, so someone who doesn't know Sprinters will reach for the thing that looks
like a fuel filler. The best answer for that is to put a label on the side of the van that says "Water Only" right over the fresh tank fill.
Not to mention my biggest fear is some nut or kid playing pranks will put something in there.
Not as bad as someone adding sugar to the fuel (does anyone still do
that as a prank?) because you'd have to add a lot of sugar to a 26-gallon water tank to make the water undrinkable; all you'd have to do to fix it is pour Kool-Aid powdered drink mix in as well, drive a mile or two over a bumpy road to stir thoroughly, and you're all set!
But seriously, I second BambiTex's recommendation; unlike drboyd's suggestion, BambiTex's is almost a direct bolt-in replacement and doesn't require doing any cutting on the side of your van. Be sure you get at least three
keys; one to put on the keyring with each of your van keys, and one to keep twist-tied to your freshwater hose with a piece of wire so it's there every time you fill your tank.