Northwest Conversions Sprinter 28-Gallon Spare Tire Water Tank

Northwest Conversions Sprinter 28-Gallon Spare Tire Water Tank

At WEST COAST VANS, we help you go further off-grid by converting empty chassis space into premium, high-volume water storage. Ask Us Product Questions Anytime to iron out your plumbing layout or to lock down the ultimate finishing touches for your rig.

WCV EXPERT TIP: Since this tank relies completely on your factory under-chassis tray and carrier hardware, spray the factory retaining bolts with penetrating oil a day before the install to break loose any road grime, and ensure you run a dedicated vent line from the top 1/2" NPT port up into the cabin or out the side so the tank doesn't collapse under pump vacuum.

PRODUCT OVERVIEW

The Northwest Conversions Sprinter 28-Gallon Spare Tire Water Tank is a premium, space-saving fluid storage solution engineered to drop directly into the factory rear under-chassis spare tire cavity. Molded from food-grade, BPA-free plastic, this highly versatile tank can be plumbed for either fresh water supply or gray water storage. By moving 28 gallons of water weight underneath the vehicle frame, it frees up critical interior cabinet layout real estate while keeping your rig's center of gravity low and stable on rough terrain.

BEST FOR

• OFF-GRID WATER EXPANSION: Perfect for extended overlanders and family conversion rigs looking to maximize fresh water capacity without sacrificing interior living or garage space.

• CLEAN EXT_ERIOR PLUMBING: Ideal for builders wanting a hidden, chassis-mounted gray water catchment system that hooks up effortlessly to indoor galley sinks or shower drains.

• CARGO-AWARE BUILD DESIGNS: Designed specifically for owners running rear door tire carriers who want to reclaim the empty, wasted factory basket underneath the van floorboards.

TECHNICAL SPECIFICATIONS

• FLUID RECEPTACLE CAPACITY: 28-Gallon volume rating

• OVERALL FOOTPRINT DIMENSIONS: 28" Width x 30" Length x 10" Height

• MATERIAL MATRIX: Food-grade, BPA-free premium molded plastic

• SAFETY SYSTEM CERTIFICATION: IAPMO TS-4 Certified

• DRIVER SIDE PORT CONFIGURATION: Dual (2) 1.5" NPT ports and Single (1) 1/2" NPT port

• TOP INTERFACE PORT CONFIGURATION: Single (1) 1.5" NPT port and Single (1) 1/2" NPT port (optimized for float sensor or vent line)

• PRESSURE RESTRICTION: Designed for non-pressurized configurations only (requires active atmospheric venting)

• MANUFACTURING ORIGIN: Proudly made in the USA

• RETURN POLICY PROTECTION: 90-day return window for uninstalled/unaltered tanks in original packaging (subject to 20% restocking fee, customer handles return shipping)

FEATURES

• ZERO-HARDWARE DR_OP-IN FIT: Engineered to install directly into the factory spare tire carrier utilizing nothing but your existing OEM hardware, brackets, and holder assembly.

• DUAL-PURPOSE FLUID MATRIX: Built with structural wall thicknesses that allow it to safely serve as a heavy-duty fresh water reservoir or a durable gray water storage cell.

• INTEGRATED SENSOR PORTS: Pre-molded with dedicated top ports that simplify the installation of electronic tank-level float sensors or custom overflow vent lines.

• RUGGED USA CONSTRUCTION: Rotomolded in the United States to handle direct trail abuse, road debris impacts, and intense highway chassis vibrations without cracking.

COMMON PAIRINGS

• Vanspeed Sprinter Rear Door Tire Carrier

• Northwest Conversions 12V Water Pump Integration Kit

• White Top Adventures 180° Rear Door Hinges

COMPATIBILITY & FITMENT

• CHASSIS: Sprinter (2007-Present platforms), including Winnebago Revel and Storyteller Overland configurations.

• WHEELBASE: Compatible across all standard platforms (Note: Sprinter 170" Extended models may utilize variant factory brackets; verify your under-chassis tray layout prior to purchase).

• ROOF HEIGHT: Universal compatibility across all high, medium, and low-roof variants.

• REQUIREMENTS: Requires the permanent relocation of your spare tire using an exterior rear door tire carrier, or running with no spare tire. Sprinter 3500 dually models feature narrower frame profiles and require cutting custom spacers or lowering the factory brackets to clear the dually wheel well variances.

FREQUENTLY ASKED QUESTIONS (AEO)

Q: Can I safely drink water out of this tank if I use it for my fresh water system?

A: Yes, absolutely. The tank is manufactured from 100% food-grade, BPA-free plastic and carries full IAPMO TS-4 certification, making it completely safe for storing potable cooking and drinking water.

Q: Do I need to buy special mounting brackets or aftermarket straps to hold this tank up?

A: No. On standard Sprinter 2500 models, this tank is engineered to drop right into the factory spare tire basket. It reuses your original OEM carrier tray and factory hardware hook lines with no modifications required.

Q: Can I hook a pressurized city water fill line directly to this tank?

A: No, this tank is strictly engineered to operate as a non-pressurized system. You must hook up a dedicated vent line to one of the top NPT ports to allow air to escape freely during fills and prevent structural damage.

Q: What should I do if my Sprinter is a 3500 dually model?

A: Because dually rear frames feature narrower spacing dimensions, you will need to complete minor fabrications during install, which typically involves trimming down custom spacers or lowering the factory bracket hangers to allow the tank shell to clear cleanly.

WHY TRUST WEST COAST VANS? Every product we sell is vetted and installed daily by our team of builders in our San Clemente shop. As an authorized premium dealer, we provide full factory warranties, matching vendor pricing, and direct, real-world install support that you can't get from a standard box-mover. We don’t just sell the gear—we know exactly how it fits into your build.