ARTICLE: Water Tank Systems for RAM Promaster Vans

Tank Configuration in Promaster Space

ProMasters handle tanks similarly to Sprinters in terms of mounting options, with good cabinetry space and accessible wheel wells. Most builds use a 28 gallon interior fresh tank.

Many builders favor interior fresh water for freeze protection and exterior gray water for drainage simplicity. This hybrid approach balances complexity with usable interior space.

Fresh Water Tank Placement

Promaster wheel wells accept 28 gallon tanks comfortably. Center-mounted interior tanks beside bathroom cabinetry also work well in the available width.

GoCode’s RVIA-certified Left, Right, and Center 28-gallon tanks fit standard Promaster cabinetry. Interior placement simplifies plumbing and winterization.