Had the same problem with filling our 90 Westy.   I made up a special 10"
filler hose which I keep in the van (used special RV potable water hose
from an RV place, but I'm not sure it matters).   On the output end it has
a ball valve so I can regulate the flow, but I also made an adapter to a
short piece of clear poly hose (used a hose repair end, available from any
hardware store,and 3/8" ID poly tubing).   The key to fast filling is to
cut the end of the poly hose at a steep angle, so there is a tongue of tube
sticking out.   When you put that into the filler properly, the tongue
pushes the rubber flap disk aside and allows fast fast filling.   When it's
properly inserted, I can fill at full house supply pressure (60 lbs) with
the ball valve all the way open and no  (well, very little) spilling.  When
I don't get the tongue properly inserted, the outside of the van gets
washed some, as you have described.

Dave

87 Wolfsburg
90 Westfalia

(usAt 11:49 PM 7/11/99 -0500, j fritz wrote:
>Volks,
>
>OK, first an admission:  Don't do the dumb stunt I did....trying to get
>bleach into the tank through the filler tube on the outside (wanted to kill
>anything living in there....its our first fill-up with the the water tank).
>Anyway, overflowed the bleach, it ran down the side and left brown streaks
>on the paint job :-(  I'm hoping rubbing compound will take it out.
>
>Now for some questions:  I hooked up a hose to the city water fill adapter.
>Only about 40 lbs. of city pressure but the faucet couldn't hold it.  Is
>there a washer kit for this thing to get it so it will stop the water flow?
>It was either turning on the electric pump or dripping.....there was no
>definitive shut-off.
>
>Second question:  How in the h*ll do you fill the water tank from the
>outside?  I stood there like an idiot holding the hose and watching the
>water run down the side of the van.  I felt like the dork in the old AAMACO
>transmission commercial.  You the know the one...some geek with his hat on
>sidewayssaying,"let me fix it boss, I was born to fix a tranthmithion"
>
>Jim in Iowa
>91 Passat Wagon GL
>89 Westy
>66 Beetle