NW Conversions 28 Gallon Promaster Wheel Well Water Tank – Left (Driver Side Offset)

28 Gallon Ram Promaster Driver Side Wheel Well Fresh Water Tank

Maximize your van build layout with the NW Conversions 28 Gallon Driver Side Wheel Well Water Tank, precision-designed to contour over the Ram Promaster left-side (driver side) wheel well. Unlike universal or centered water tanks, this offset design positions the bulk of the tank capacity toward the rear (left side), making it ideal for specific cabinetry, galley, or bed system layouts.

Designed for professional van conversions and serious DIY builders, this 28-gallon fresh water tank provides ample water capacity while maintaining a low center of gravity for improved driving stability.

While optimized for the Promaster, this tank is also compatible with Mercedes Sprinter and Ford Transit driver-side wheel well applications (minor top gap may occur due to wheel well size differences).

Why Choose a Driver Side Offset Wheel Well Tank?

Generic or centered tanks often compromise valuable floor space and require custom framing. This left-side offset tank is engineered to:

• Maximize usable interior space

• Support driver-side galley or bed layouts

• Improve weight distribution

• Maintain a low, stable center of gravity

• Reduce fabrication time during installation

Ideal for Promaster camper vans, overland builds, and professional upfits.

Key Features

Driver Side (Left Offset) Configuration

• Designed specifically for the Ram Promaster driver-side wheel well

• Extends rearward to support driver-side cabinetry and floor plans

• Clean fitment for professional builds

Space-Efficient Design

• Hugs the wall and wheel housing

• Keeps 28 gallons of water weight low and stable

• Preserves valuable interior floor space

BPA-Free Food Grade Construction

• Safe for potable water storage

• Rotomolded polyethylene for strength and durability

• Impact-resistant and long-lasting

• Made in the USA

Versatile Plumbing Configuration

Multiple molded port options allow flexible plumbing layouts:

• (2) 1/2" NPT ports – Open and ready to use

• (2) 1.5" NPT end ports – Spun closed (must be drilled if used)

• (1) 1.5" NPT top port – Spun closed (ideal for gravity fill or water level sensor; requires drilling if used)

Important: Tank must be properly vented and is designed for gravity fill systems only. Do not pressurize.

Vehicle Compatibility

Ram Promaster

• Optimized for Driver Side / Left Wheel Well

• Direct contour fit

Mercedes Sprinter (Driver Side)

• Compatible driver-side installation

• Minor top gap may occur due to smaller wheel well size

Ford Transit (Driver Side)

• Compatible driver-side installation

• Minor top gap possible

Custom Builds

• Box trucks

• Trailers

• Off-grid builds requiring left-side wheel well configuration

Technical Specifications

• Capacity: 28 Gallons

• Dimensions: 48" L x 14" W x 20" H

• Weight: 32 lbs

• Orientation: Left Side / Driver Side Offset

• Material: BPA-Free Food Grade Polyethylene

• Manufacturing: Rotomolded in the USA

• System Type: Gravity Fill / Vented (Do Not Pressurize)

Frequently Asked Questions

Is this tank pressurizable?

No. This tank is designed for gravity-fill, vented systems only and should not be pressurized.

Are fittings included?

The tank includes molded NPT ports. Plumbing fittings must be purchased separately based on your system design.

Will this fit my Sprinter or Transit?

Yes, it can fit the driver-side wheel well. A slight top gap may be present due to wheel well size differences compared to the Promaster.

Is this safe for drinking water?

Yes. It is made from BPA-free, food-grade polyethylene suitable for potable water storage.

Optimize Your Promaster Water System

The NW Conversions 28 Gallon Driver Side Wheel Well Water Tank is engineered for efficient space utilization and balanced weight distribution in driver-side van layouts. Built in the USA and designed specifically for real-world camper van conversions, it delivers durability, safety, and installation flexibility.