On my early auto stop fill valve (which never worked) the bleeder had to be
opened several turns to let it fill.  Quantity of LPG in tank has no effect.
Replace that defective, non-working valve with a standard RV fill valve and
bleed valve, and replace the supply valve and regulator too (if you have the
square regulator).  Total parts cost is about $130 with regulator.  Just did
it on my '85.

Stuart

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Edward Maglott
Sent: Saturday, September 08, 2012 4:53 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Propane tank fill valve

So, anybody have any idea how much pressure it takes to open the fill valve
to let the propane in?  Would that pressure be less if the tank were empty?
Thanks,
Edward