Contact Transfer Flow (800) 442-0056 or go to their web site www.transferflow.com
. (made in California) I think you should use only a DOT approved tank for insurance purposes on any mobile vehicle. I used to sell their fuel tanks in my working life at a truck equipment dealer. Good people to deal with and if they can't help maybe they can steer you to someone that can.
They make an excellent product.
2014 Palomino Puma 25RS 28 days in 2014, 47 days in 2015, 51 days in 2016 plus 6 more booked
2011 F-150 Supercrew 5.0 6spd, Me, Xyl and the 2 kids, BooBoo and Gracie (kittens)