---- Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM> wrote:
> part of the weirdness is the tank has been in use for several months.

Has it actually been used during that time, or just on the vehicle?  Maybe it was installed a while back, but never purged.  Or, maybe like I said earlier, a bad valve.  Possible.
>
>
> On 10/3/2012 11:15 AM, Mike S wrote:
> > On 10/3/2012 11:32 AM, Stuart MacMillan wrote:
> >> Problems like this are maddening!  Bad auto stop valve or bleed valve
> >> that
> >> doesn't vent are the only things that can prevent filling.
> >
> > It's more likely that the tank simply needs to be purged of air, as
> > already mentioned.
> >
> > When the tank has nothing but propane in it, it can be easily filled.
> > Pumping liquid propane in increases the pressure, and the existing
> > propane gas in the tank turns to liquid, making room. For a tank at 80F,
> > that pressure is about 130 psi.
> >
> > If you try to fill a tank which has air in it, the air simply
> > compresses, and pressure goes up. New tanks are often shipped with
> > compressed air in them, so you can't push much propane in before the
> > pressure gets too great to be able to pump more.
> >
> > Hence, the need to purge the air from the tank before first use.
> >

--
David McNeely