Originally Posted by Lon
My five gallon tank is functioning perfectly but I hate Navy showers. I'm going to sacrifice one wardrobe in my mini lite 2034 and put in a 20 gallon tank. I agree that hauling 20 gallons of water down the road won't do much for the old gas mileage but I plan to drain the tank before pulling up stakes. I just love long hot showers in my own space. After all I've already paid the utility bill. Here's hoping it's a simple job
You may want to consider just adding a 10 gallon WH in series with the existing WH (or upgrading the 6 to a 10 and then adding another 10). That will give you a lot more flexibility and may mean you don't have to give up the wardrobe since the 2nd WH can be placed in a different area.
The water weight won't affect your mpg at all, air resistance on TT is king. No need to drain your tank(s). Case in point, my prior TV was a Sienna. Pulling my popup it got 16 mpg, pulling my R-pod it got 12 mpg. The popup weighed close to 3500 pounds loaded, the R-pod was 3000. 500 pounds more on the popup but much better mpg.