glennemay wrote:
These are definitely some great suggestions.
;) I guess I Was hoping for non removal of the tank. The camper is insulated and the tank is up in the underbelly. I am assuming you all are correct in the sense that it does have to come out in order to be completely cleaned and made useable.
If you can't get it out but can get access to the pickup fitting, you could build a simple fuel polisher. Not as good as full removal but I have used it with success on a boat we bought that had about 1/2 gal of water in the tank.
Buy a water separating funnel:
https://www.amazon.com/Mr-Funnel-AF3CB-Fuel-Filter/dp/B000SOIRCG/ref=sr_1_2?dchild=1&keywords=water+separator+funnel&qid=1622643982&sr=8-2
Rig up a hose so the funnel feeds back into the tank. Then pump into the filter. If you can fit an inline fuel filter downstream of the funnel that would be good.
The only trick is on the boat, the fuel pump I used was low volume, so once I set it up and secured the funnel in place, I just let it run for a couple hours, checking the funnel occasionally for water and dumping. I'm guessing the fuel station pump on the trailer will be higher volume, so you will have to be careful not to overload the funnel. Once you are comfortable that the water is out, you could remove the funnel and connect directly to the inline filter. No matter what, you probably want to keep an eye on the system so it doesn't dump 20gal of fuel on the ground.