On Aug 16, 2013, at 6:07 PM, Stuart MacMillan <stuartmacm@GMAIL.COM> wrote:

This also gives you a chance to inspect and clean out your tank with a good scrubbing and disinfectant!  

My tank was a biology experiment gone berserk when I bought the van.  It was about a quarter full when the faucet was broken off and it sat in the Eastern Oregon sunshine for a year, and then here in the damp Northwest at a repair shop for 18 mos.  Scrubbed and bleached the biomass out of it and it's fine now!

I've never needed to disinfect the potable water tank because when I get home, I open it up and leave it that way until it dries. Taking the drain plug off and purging
the faucet line of water and leaving the tank lid off, lets the system dry completely.

and:

In fact, that is how I fill the tank whether with a hose or a jug.  I have a five gallon jug with a spigot.  I can rest it on the lip of the cabinet above the tank, open the spigot, and drain the water into the tank.  If using a hose, I have a valve that fits on the end of the hose, so I can control the flow.  Much better than trying to fill through the outside port.  That is very slow.

I don't know what it is you're doing when trying to fill from the outside, but apparently very different from what I'm doing.
The GoWesty filler nozzle, inserted into the filler tube, will fill the tank (13 gallons) in about 5-6 minutes.

I carry a hose with me so I can always find a place to fill up when I'm out traveling/camping, and I'm often out for
3-4 weeks at a time. I sometimes fill from the inside using the hose, but that is no faster than from outside.

bob