
22 gallons of hidden capacity — mounted right next to your fuel tank, completely out of sight.
The SP-UC-22 fits under the driver side of your Sprinter, tucked alongside the OEM fuel tank in space that would otherwise go unused. Three laser-cut stainless steel straps use the existing fuel tank strap mounting points, minimising new holes and keeping installation clean and straightforward. Suitable for fresh or grey water.
Built from food-grade, BPA-free polyethylene and certified to IAPMO TS-4 / RVIA standards. Made in the USA by NW Conversions.
Fits:
∙ Mercedes Sprinter 2007–present — all wheelbases
∙ Driver side undercarriage, next to fuel tank
∙ May fit other makes and models — confirm dimensions before ordering
Specs:
Weight: 23 lbs
| Capacity | 22 gallons |
| Dimensions | 46″ L × 12.25″ W × 9.25″ H |
| Material | BPA-free, food-grade polyethylene |
| Certifications | IAPMO TS-4 / TEI Listed / RVIA Approved |
| Made in | USA |
| System type | Non-pressurised — must be vented |
| Hardware included | (3) stainless steel laser-cut mounting straps, 3/8″ hardware, 3/8″ rivnuts. Rivnut tool required — not included. |
| Running board compatibility | Compatible with AMP Research PowerStep Electric Running Boards for 2019+ Mercedes Sprinter 907/VS30 (part #76264-01A) |
*May be compatible with additional running boards*
Ports:
∙ Rear-facing end: (2) 1.5″ NPT + (2) 1/2″ NPT
∙ Top (8.5″ back from end): (1) 1.5″ NPT
What’s Included:
Tank, (3) stainless steel laser-cut mounting straps, stainless 3/8″ hardware, 3/8″ rivnuts. Rivnut tool required — not included.
Tank Compatibility:


RackUp+Go On YouTube
Large Inventory
Expertly Curated
Free Shipping
Fast & Free Shipping
Price Guarantee
RackUp PRO Deals
30-Day Returns
Hassle-Free Returns
Got Questions?
We're here to help!