Replace the Autostop with a regular fill valve and
a bleeder valve.  You can do this yourself or a good
RV shop can do it.  It then works like other tanks and
people filling the tank know how it works, which
they don't with the Autostop.

Less than $40 for both.  There is lots in the archives
about this.

                        Richard A. Jones
                        Boulder, Colorado
                        '81 Vanagon   Mr Bus
                        '87 Syncro Westy   El Jefe
                        (with 2 propane tanks)