The motorcycle kit is designed for up to 6.5 Gallon's I think ( that may well be little US versions of gallon though )
anyway....was just enough for my 5.5 G RH tank.....maybe your larger van tank needs the bigger kit (?)
I recomend it for such a leak anyway....it's what it's designed for I think.
Found this....seems a bit pricey...I paid about half that
http://www.amazon.co...t/dp/B000H9K4JQ
Edited by Spitz, 03 October 2012 - 04:40 PM.