Because it will blow off the van at highway speeds.  It was never made for
this purpose.  I have recently traveled for the past two weeks (Ventura,
CA to Circle Yer Wagens [Sevierville, TN]) in several severe
thunderstorm/downpours in Oklahoma/Arkansas/Tennessee on Interstate 40 with
the propane on without having it blow (or drown out) on "Ole Putt".  Fridge
worked just fine on LP.  As Dave says, it is only to be used when washing
your Westy, perhaps to prevent a bunch of water all at once going into the
flue.
-- 
Jim Thompson
84 Westfalia 2.1 "Ole Putt"
73 K Ghia Coupe "Denise"
72 411 Station Wagon "Pug"
oldvolkshome@gmail.com
http://www.oldvolkshome.com
**********************************
On 5/16/06, Jeffrey Vickers <jeff@vickersdesign.com> wrote:
>
> I've never understood this particular directive from the DeathStar
> (VW). Why would you need this cover in a car wash but not in the rain
> going 60 mph? And while we're on the subject, have you ever felt how
> HOT the exhaust from the fridge gets? It would take a super-robusto
> robo-spider to survive that blast furnace...
>
> Jeff / 87 Syncro Westy
> On May 16, 2006, at 5:05 PM, Automatic digest processor wrote:
>
> > Date:    Tue, 16 May 2006 17:20:05 -0400
> > From:    David Milo <dellaone@GMAIL.COM>
> > Subject: Re: flue vent cover
> >
> > Moreover, the manual for the Westy suggests that it be installed
> > when you
> > are washing the van.
> >
> > Dave
>