The NW Conversions 25 gallon dually water tank (SP-DU-25) is designed specifically for dual rear wheel vans. It fits the wheel well space, keeping your floor plan open while adding water capacity. AVC RIG carries it for Sprinter and Transit dually builders.
About the 25 Gallon Dually Water Tank
The 25 gallon dually water tank is shaped for the wheel well of dual rear wheel vans, so your water sits in space you would otherwise lose. Placing it over the dual rear wheel well keeps the center of the floor clear.
Specifications
- Nominal dimensions: 46" L x 14" W x 20" H
- Actual dimensions may vary up to 1.5% each.
-
Capacity: 25 gallons
-
Dry Weight: 19 lbs
-
Filled Weight: 227 lbs
-
Recommended Sensor: KUS S5U-19
-
Recommended Heating Pad: Facon CW-T825
- Not designed for pressurized systems, must be vented
Materials & Certifications
- BPA-free, food-grade plastic
- Made in the USA
- IAPMO TS 4 Certified
- TEi listed and RVIA approved


What's Included
- Water Tank
- Support plate and mounting hardware included with every order
Ports & Plumbing
- (2) 1.5" NPT ports on the larger end, pre-marked, drill out to use
- (2) 1/2" NPT ports on the larger end
- (1) 1.5" NPT port on the end above the wheel well, pre-marked, drill out to use
- (1) 1/2" NPT port on the end above the wheel well
- (1) 1.5" NPT port on top, pre-marked, drill out to use
The pre-marked NPT ports let you drill only what your plumbing needs. Ports on both ends make it easy to plumb from either direction.
Shipping & Lead Time
- Ships in 1-2 business days
Note: Despite great care taken during manufacturing and fulfillment, plastic tanks can become dirty and/or scuffed in transit. This does not constitute a damaged tank. Plastic tanks can also become slightly warped, especially on the flat surfaces. This is normal and does not render the tank defective. Maintaining a completely straight/flat surface on a rotationally molded part is not always possible, but we make every effort to keep surfaces within a 1.5 degree tolerance.
Compatibility
- Sprinter 3500 Dually primary fit (also fits Sprinter T1N dually)
- Transit Dually direct fit with slightly more room around the wheel well for insulation
- ProMaster requires a 3.5" elevation to clear the larger wheel wells
- Compatible with other makes and models
- Can be placed on either driver or passenger side

Because the 25 gallon dually water tank can go on either side, you only need one part number. Want a slimmer profile? See the 19-gallon slim dually wheel well water tank, or shop Sprinter van conversion parts.
Resources