Tanks moulded to the Ford Transit chassis. The code in each title is the fitment: TR = Transit, then L / R / C for left, right or centre wheel-well, UC for undercarriage and ST for the spare-tire position, followed by gallons.

The Transit's wheel-well geometry is shallower than a Sprinter's, so per-tank capacity is a little lower - which is exactly why builders run two. A left and right pair at 24 gallons gives 48 gallons with balanced weight, or add the 25 gallon centre tank under a bed platform.

The 24 gallon spare-tire tank is the cheapest capacity on the vehicle if you have already relocated the spare to a rear-door carrier. The driver-side 20 gallon undercarriage tank costs zero interior space. See all mounting styles in Van Water Tanks.