>We're heading out on a small camping trip up the coast of California. I
>was at an RV shop this morning, getting a little Olympian 3100 catalytic
>heater installed in the 84 Westy camper van and the fellow there pointed
>out that my usual technique of sticking a bucket under the sink drain,
>is not exactly legal. He suggested that I find a little 2 - 5
>collapsible tank with a garden-hose fitting that I could run my drain
>into. Collapsible is important -- we don't have much room inside.
>
>But, other than http://tinyurl.com/3la2k , which I don't think has
>garden hose fittings, I'm having trouble finding anything. Ideas?

Here's a good site talking about graywater tanks for small vehicles:
http://www.title-3.com/GrayWater.htm
Looks like people have adapted the very tanks you link to above, so they
must be about the only thing available beyond the standard blue RV tanks
you find. I found lots of tanks by Googling "collapsible tank", but nothing
smaller than 75 gallons. I'm guessing you want something a wee bit smaller
than that. :)

John Bange
'90 Vanagon "Geldsauger"