Wheel Well Water Tank (20 Gallon) for Sprinter, Transit and Promaster Vans - Left Wheel Well Water Tank (20 Gallon) for Sprinter, Transit and Promaster Vans - Left
Wheel Well Water Tank (20 Gallon) for Sprinter, Transit and Promaster Vans - Left Wheel Well Water Tank (20 Gallon) for Sprinter, Transit and Promaster Vans - Left
Wheel Well Water Tank (20 Gallon) for Sprinter, Transit and Promaster Vans - Left Wheel Well Water Tank (20 Gallon) for Sprinter, Transit and Promaster Vans - Left
Wheel Well Water Tank (20 Gallon) for Sprinter, Transit and Promaster Vans - Left Wheel Well Water Tank (20 Gallon) for Sprinter, Transit and Promaster Vans - Left
Wheel Well Water Tank (20 Gallon) for Sprinter, Transit and Promaster Vans - Left Wheel Well Water Tank (20 Gallon) for Sprinter, Transit and Promaster Vans - Left
Wheel Well Water Tank (20 Gallon) for Sprinter, Transit and Promaster Vans - Left
Wheel Well Water Tank (20 Gallon) for Sprinter, Transit and Promaster Vans - Left
Wheel Well Water Tank (20 Gallon) for Sprinter, Transit and Promaster Vans - Left
Wheel Well Water Tank (20 Gallon) for Sprinter, Transit and Promaster Vans - Left
Wheel Well Water Tank (20 Gallon) for Sprinter, Transit and Promaster Vans - Left

NW Conversions

Wheel Well Water Tank (20 Gallon) for Sprinter, Transit and Promaster Vans - Left

$299.00 USD
Shipping calculated at checkout.
Shipping & Returns

Order Changes

Once an order is placed, we ask that all changes (concerning appliances, width, add-ons, material) be made in the following 7 DAYS. Any changes made after this time will be charged a 30% restocking fee. This policy has been implemented to further guarantee the quality of your order and reduce any inconsistencies. 

Order Refunds

We strongly advise all customers to read over our refund policy. This is located here. Custom orders CANNOT be refunded once in production. The Serg Supply team will notify you when your product is going into production. Refunds cannot be issued after this point in the process. More details can be found on our Refund Policy Page.

Order Damages

If damage occurs to your order through shipping transit, please notate on your delivery documents. This will be visible by the pallet and/or the shrink wrap being damaged. After delivery, please email office@sergsupply.com for follow up. More details can be found on our Shipping Policy Page. This is located here.

Shipping

Parcel

Orders with smaller items weighing less than 100lbs ship via UPS, FEDEX, or USPS. 

Pallet

Any orders with items weighing over 100lbs or larger than 72" in any direction must be shipped on a pallet. Update: Shipping is free for select SergSupply manufactured products!

Each pallet is insured with liftgate service + residential charge applied. If you have a commercial address with a forklift, please state it in order notes for quicker delivery.

You can see our complete shipping policy here.

Local Pickup

Want to save time on shipping? Select the local pickup option at checkout and we will notify you when your order goes into production to set a pickup date.

Product Warranty

All products are covered under a 90-day manufacturer warranty to guarantee the quality of your product and quality of construction. If you should have any quality issues with your product, contact us at office@sergsupply.com.
Installation Services

Serg Supply now offers installation services! 

For details on what products we service, prices, and Terms & Conditions, please review this page:

Installation Services Details

To schedule an installation, please email us at office@sergsupply.com or you can schedule an appointment on our website under the "Installation" top tab. Please state which product you wish to install, vehicle type, and if there are already products installed into your vehicle. 
Description

The 20 Gallon Wheel Well Water Tank is a space-efficient and thoughtfully designed water storage solution for campervans, truck campers, overland rigs, and custom adventure vehicles. By utilizing the often-overlooked space around the wheel well, it preserves interior layout while keeping water weight low and balanced for safer handling on the road. Constructed from BPA-free, food-grade plastic, this tank is ideal for vented, non-pressurized systems, providing a reliable and long-lasting freshwater storage solution. Multiple 1.5-inch and 1/2-inch NPT ports allow for versatile connections to pumps, sensors, or venting, giving you complete control over your water system. Designed with flexibility in mind, the tank can be installed on either the driver or passenger side, adapting seamlessly to your van conversion layout.

This tank is engineered to fit Sprinter 2500, Sprinter T1N, and Transit single rear wheel vans, and with minor adjustments, it can also accommodate ProMaster models. Transit wheel wells are slightly smaller than Sprinter vans, offering additional room for insulation, while ProMaster installations require a 3.5-inch elevation to fit larger wheel wells. The tank sits toward the rear of the wheel well on the driver side and in front of the wheel well on the passenger side, optimizing space without compromising access. Its non-pressurized design ensures safe operation, and IAPMO TS-4 compliance guarantees adherence to the highest standards for water storage.

At 44.5 inches long, 16 inches tall, and 12.5 inches deep, the tank provides ample water capacity while maintaining a compact footprint over the wheel well. Its lightweight construction ensures manageable installation without sacrificing durability. With meticulous attention to design and materials, this wheel well tank transforms previously wasted space into a highly functional, professional-grade water storage solution for your van. Made in the USA, it reflects the quality and reliability van owners expect for long-term adventures.

Notes: 

  • Transit: Slightly smaller wheel wells allow for additional insulation

  • ProMaster: Requires 3.5” elevation for proper fit

Key Features

  • Fits Sprinter 2500, Sprinter T1N, Transit single rear wheel vans, and Promaster

  • Driver or passenger side installation

  • Sits rear of wheel well on driver side, front of wheel well on passenger side

  • Made from BPA-free, food-grade plastic

  • Multiple 1.5” and 1/2” NPT ports for versatile water connections

  • Non-pressurized design; must be vented

  • Made in the USA

Specs

  • Capacity: 20 gallons

  • Weight: 25 lbs

  • Dimensions: 44.5” L × 16” H × 12.5” D

Policies, Shipping, Warranty

Order Changes

Once an order is placed, we ask that all changes (concerning appliances, width, add-ons, material) be made in the following 7 DAYS. Any changes made after this time will be charged a 30% restocking fee. This policy has been implemented to further guarantee the quality of your order and reduce any inconsistencies. 

Order Refunds

We strongly advise all customers to read over our refund policy. This is located here. Custom orders CANNOT be refunded once in production. The Serg Supply team will notify you when your product is going into production. Refunds cannot be issued after this point in the process. More details can be found on our Refund Policy Page.

Order Damages

If damage occurs to your order through shipping transit, please notate on your delivery documents. This will be visible by the pallet and/or the shrink wrap being damaged. After delivery, please email office@sergsupply.com for follow up. More details can be found on our Shipping Policy Page. This is located here.

Shipping

Parcel

Orders with smaller items weighing less than 100lbs ship via UPS, FEDEX, or USPS. 

Pallet

Any orders with items weighing over 100lbs or larger than 72" in any direction must be shipped on a pallet. Update: Shipping is free for select SergSupply Manufactured items!

Each pallet is insured with liftgate service + residential charge applied. If you have a commercial address with a forklift, please state it in order notes for quicker delivery.

You can see our complete shipping policy here.

Local Pickup

Want to save time on shipping? Select the local pickup option at checkout and we will notify you when your order goes into production to set a pickup date.

Product Warranty

All products are covered under a 90-day manufacturer warranty to guarantee the quality of your product and quality of construction. If you should have any quality issues with your product, contact us at office@sergsupply.com.

Installation Services

Serg Supply now offers installation services in Auburn, California!

We are excited to announce that Serg Supply is now accepting installation services at our Auburn, California shop! Enjoy the convenience of same-day installations on select products, ensuring you can get back on the road quickly and efficiently. For full conversions please allow 2-3 weeks for installation.

Please note that the pricing for the products does not include installation costs. For details on what products we service, prices, and Terms & Conditions, please review this page:

Installation Services Details

To schedule an installation, you can either email us at installs@sergsupply.com or call us directly at (941) 876-5000. For additional information please see our "Schedule an Installation" page. Please state which product you wish to install, vehicle type, and if there are already products installed into your vehicle. We look forward to helping you build out your van!

Stirring The Pot

ONLY THE BEST Materials

BPA FREE - FOOD GRADE POLYETHYLENE PLASTIC

Unlike traditional plastics, BPA-free materials do not leach harmful chemicals into the water, protecting your health and well-being.

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HOW DO I PICK THE RIGHT TYPE OF WATER TANK?

Selecting the right water tank is crucial for ensuring you have a reliable water supply. Water tanks come in various types, each with its own set of advantages and disadvantages. Understanding these options will help you make an informed decision based on your travel habits, space constraints, and climate considerations.

These tanks are the most popular choice among van owners, as they are installed inside the van, significantly reducing the risk of freezing and making them ideal for colder climates. They fit seamlessly into SergSupply Wheel Well Boxes and SergSupply Universal Wheel Well Box Bed Systems, maximizing space utilization and providing easy access.
This tank saves interior space and remains out of sight, contributing to a clean aesthetic in your van. However, it risks freezing in colder climates, which can limit its usability, and its capacity may be restricted based on the size of the spare wheel compartment, requiring more frequent refills during longer trips.
Pros include space efficiency and a concealed installation that keeps the interior tidy, allowing for a more spacious living area. However, it is prone to freezing in cold weather, which can lead to potential damage and inconvenience, and accessing it for maintenance can be more challenging due to its location.

Shop with confidence

A BRAND YOU CAN TRUST

Since 2019, SergSupply has built a reputation in the industry for being the very best at what we do, carrying only the best products, and partnering with only top-of-the-line manufacturers.

Unmatched Customer Service

We don't outsource customer support. When you call, we answer.

Perfect Fit

The water tanks are the ideal match for the SergSupply Wheel Well Boxes and Bed Systems.

Quick Installation

Tanks come with all necessary hardware, making it simple for you to install.