Fisherman wrote:
I can hardly believe that you have a 90 gallon tank fresh water tank. More than likely it's no more than a 40 gallon fresh water tank. You don't fill the grey and black water tanks, they fill from using the toilet and sinks/shower. You only fill the hot water tank and fresh water tank. Mine takes about 10-12 minutes to fill with a garden hose.
I wouldn't have believed it either, but this is from Jayco's site,
http://www.jayco.com/products/travel-trailers/jay-flight/floorplans-specs It specifically says "90 gal fresh water, includes water heater".
I've seen them that big (or bigger) in a Class A, but not in a 26' anything.