Northwest Conversions wheel well water tanks are great for making the most of your van build space. Our interior water tanks are designed to fit over the wheel well, optimizing the space and having a lower center of gravity. There are several undercarriage tanks for the Sprinter and Transit vans as well as a spare tire water tank for the Sprinter van. The tanks are made from NSF approved BPA Free Food Grade Plastic and are the most durable polyethylene tank available. The tanks are TEI tested and listed to meet the standards of the RVIA.  We offer a variety of models of different water tank sizes and include ports that are located both in the front and the back of the tank.