On Aug 17, 2013, at 10:47 AM, David Beierl <dbeierl@ATTGLOBAL.NET> wrote:

At 12:28 PM 8/17/2013, Dave Mcneely wrote:
> instruct me on how to fill the tank via the outside filler in a
> reasonable amount of time.  For me, the water flows into the tank
> very slowly, backs up, and so on.  The result is the same no matter
> how deeply I insert the tube of the nozzle into

That's the symptom of a blocked vent.

Yours,
David

....what David said.
I'll admit, I don't try running full-force water through the GW nozzle, but it flows very fast
and fills the 13 gal. tank in 5 minutes at most. Thats the nice feature of that nozzle, it has
a valve on it that can be flow-adjusted.

bob