Front end of the 22 gallon Sprinter wheel well tank with four threaded ports

22 gallon Sprinter wheel well tank with black hold-down straps and threaded ports

Underside cutout of the 22 gallon tank that wraps over a Mercedes Sprinter wheel well

Assembly drawing of the 22 gallon wheel well tank with straps, plus nuts and bolts

Drawing of the 22 gallon Sprinter wheel well tank showing NPT port sizes

22 gallon Sprinter wheel well tank, about 44.5 by 12.5 by 16 inches

Flat side of the 22 gallon Mercedes Sprinter wheel well tank with two straps

22 gallon Sprinter tank in two views with 1-1/2 and 1/2 inch NPT port callouts

Long face of the 22 gallon Mercedes Sprinter wheel well tank with straps

Dimensioned view of the 22 gallon Sprinter tank showing its contoured foot

End view of the 22 gallon Mercedes Sprinter wheel well tank with fittings and straps

S&B Filters

22 Gallon Sprinter Van Wheel Well Water Tank

$349.00

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Product variants

Pickup available at Sandy Vans HQ

Usually ready in 2-4 days

22 gallons of water in space you weren't using.

This 22 gallon wheel well water tank sits on top of the rear wheel well inside your Mercedes Sprinter, so your fresh water lives in a spot that's usually dead space. The tank ends right where the wheel well ends, so furniture forward of it isn't affected. It's food grade, BPA-free polyethylene, TEI tested and listed, and it straps to the van with the included straps and hardware.

Fits: 2007+ Mercedes Sprinter 144", 170" and 170" EXT (single rear wheel). Also fits 2015+ Ford Transit 130" and 148".
Not compatible: Dually (dual rear wheel) vans.

About 22 gallons, about 44.5" L x 12.5" W x 16" H
24 lb dry
Six threaded NPT ports for fill, vent, pump feed and a level sensor
Straps, plus nuts and bolts included
TEI tested and listed, RVIA compliant

Choose your variant: Driver or Passenger side. The two tanks are mirror images. Run one on each side for about 44 gallons.

Feed it with a SEAFLO 33 Series Water Pump. Want water under the van instead? See the 22 Gallon Driver Side Undercarriage Tank and the 16 Gallon Passenger Side Undercarriage Tank.

See it on your van. Add the 22 Gallon Sprinter Van Wheel Well Water Tank to your build in our 3D Van Builder and preview it on a real Sprinter before you buy.

Product Details

Water storage that doesn't eat your floor

Fresh water takes up room, and in a van every inch counts. The rear wheel wells are already there, and the space on top of them usually ends up as a dead corner. This tank is shaped to wrap over the wheel well, so you carry about 22 gallons without giving up floor space.

Shaped for the wheel well

The underside is cut out to match the wheel well, and the front of the tank stops where the wheel well ends. Cabinets, a galley or a bench can start right in front of it.

Ports where you need them

The tank has six threaded ports: a 1-1/2" NPT port on top, two 1-1/2" and two 1/2" NPT ports on the front end, and a 1/2" NPT port low on the back end. Use the top port for a 15 inch level sensor, the upper front ports for fill and vent, and the lower 1/2" port on the front end to feed a forward-mounted pump without running line down the side of the tank.

Pick a side, or both

Driver and passenger tanks are mirror images. Choose the side that puts water closest to your galley and pump, or run one on each side for about 44 gallons.

Built and listed for RV use

The tank is food grade, BPA-free polyethylene, pressure tested at the factory, and TEI tested and listed and RVIA compliant. Pair it with a SEAFLO 33 Series Water Pump to complete your fresh water system.

Fitment & Compatibility

Fits: 2007+ Mercedes Sprinter 144", 170", 170" EXT (SRW); 2015+ Ford Transit 130", 148"

Drivetrains: RWD, AWD and 4x4

Not compatible with: Dually (dual rear wheel) vans

Not sure your build qualifies? Reach out to our team.

Specifications

Brand / part numbers	S&B Filters 10-3003 (driver), 10-3004 (passenger)
Fits	2007+ Mercedes Sprinter 144", 170", 170" EXT (single rear wheel); 2015+ Ford Transit 130", 148"
Side	Driver or passenger (mirror images)
Capacity	About 22 gallons
Dimensions (approx.)	44.5" L x 12.5" W x 16" H
Dry weight	24 lb
Full weight (approx.)	About 207 lb (22 gal x 8.34 lb/gal + 24 lb tank)
Material	Food grade, BPA-free polyethylene
Ports	1 x 1-1/2" NPT top; 2 x 1-1/2" and 2 x 1/2" NPT front end; 1 x 1/2" NPT low back end
Level sensor	15" sensor fits the top port (not included)
Certifications	TEI tested and listed, RVIA compliant

What's in the Box

22 gallon wheel well water tank (driver or passenger)
2 hold-down straps
4 M10 x 1.50 plus nuts
4 class 10.9 black phosphate bolts
Plus nut install tool

DIY FriendlyYes, with basic plumbing skills

Drilling RequiredYes, four plus nut holes

The tank sits on top of the rear wheel well and is held down by two straps. Each strap end bolts into a plus nut set in the van sheet metal. You drill the holes, set the four M10 plus nuts with the included tool, then bolt the straps down over the tank. Where the sheet metal dips, you may need a couple of washers or a bushing so the strap sits flush.

Plumb a gravity fill with 1-1/4 inch RV fill hose (a 90 degree 1-1/2 to 1-1/4 inch fitting lets you turn it toward the side), and run a 1/2 inch vent line. A 15 inch level sensor threads into the top port; it is sold separately. There is no customer install manual on this page yet, so reach out to our team with questions.

We install water systems at our San Diego shop. Reach out for a quote.

Mistakes to avoid

Ordering for a dually. This tank does not fit dual rear wheel vans.
Forgetting the weight. A full tank weighs about 207 lb, so strap it down before you drive.
Skipping the vent. Without a vent line the tank fills slowly and can gurgle or overflow at the fill.
Running feed line the long way. Use the low 1/2 inch port at the front end to feed a forward-mounted pump.
Leaving straps loose where the floor dips. Shim with washers or a bushing so each strap sits flush.

Tools You'll Need

Drill and bits sized for M10 plus nuts
Open-end wrench for the plus nut tool
Socket or wrench for the strap bolts
Thread sealant rated for potable water

See all Sandy Vans install videos & manuals →

How to choose a wheel well water tank

Here's what customers ask, in order.

1. Will it fit your van?

It fits 2007+ Mercedes Sprinter 144", 170" and 170" EXT with single rear wheels, plus 2015+ Ford Transit 130" and 148". It does not fit duallys.

How to choose: Single rear wheel Sprinter or Transit: it fits. Dually: look at undercarriage tanks.

2. Driver or passenger side?

The two tanks are mirror images. The side you choose decides how far your water lines run.

How to choose: Put the tank on the same side as your galley and pump. Need more water: order one of each.

3. How much water do you need?

One tank holds about 22 gallons. Two tanks hold about 44.

How to choose: Weekend trips or a light galley: one tank. Long stays off grid or a shower: two tanks, or add an undercarriage tank.

4. Inside or under the van?

A wheel well tank stays warm with the cabin and is easy to reach. An undercarriage tank frees up the wheel well for storage or seating.

How to choose: Cold weather camping or easy access: wheel well tank. Wheel wells already used: 22 gallon or 16 gallon undercarriage tank.

Before you order

Confirm a single rear wheel Sprinter or Transit
Pick driver or passenger side
Plan your pump, fill and vent locations
Decide if you want a level sensor (sold separately)
Check that nothing is mounted over the wheel well

How this wheel well tank stacks up

Fitment: 2007+ Sprinter 144, 170 and 170 EXT, plus 2015+ Transit 130 and 148.
Capacity: about 22 gallons per side, about 44 with both.
Plumbing: six NPT ports, including a low front feed and a top sensor port.
Build: food grade, BPA-free, TEI tested and listed, RVIA compliant.
System: feed it with a SEAFLO 33 Series pump.

Will this fit my Sprinter?

It fits 2007+ Mercedes Sprinter 144", 170" and 170" EXT with single rear wheels, in any drivetrain. It does not fit dually vans.

Should I get the driver or passenger side?

Pick the side closest to your galley and pump so your water lines stay short. The tanks are mirror images, and you can run one on each side for about 44 gallons.

Does it fit a Ford Transit?

Yes. It also fits 2015+ Ford Transit 130" and 148" single rear wheel vans.

What comes with it?

The tank, two hold-down straps, four M10 plus nuts, four bolts and a plus nut install tool. A level sensor is not included.

What size are the ports?

One 1-1/2" NPT on top, two 1-1/2" NPT and two 1/2" NPT on the front end, and one 1/2" NPT low on the back end.

Can I add a level sensor?

Yes. A 15 inch level sensor threads into the top port. It is sold separately. The tank also works with externally mounted level sensors.

How heavy is it when full?

About 207 lb: 22 gallons of water at about 8.34 lb per gallon plus the 24 lb tank.

Can you install it?

Yes. We install water systems at our San Diego shop. Reach out for a quote.

Do you install products for customers?

Yes. Many SV products can be professionally installed at our San Diego shop. Reach out to our team to schedule. Email products@sandyvans.com or call 619-812-1903.

What is your shipping and return policy?

Most SV products ship free. For returns, see our Returns & Refunds policy or reach out to our team at products@sandyvans.com.

Can I reach a real person with questions?

Always. We are a small team in San Diego. Email products@sandyvans.com or call 619-812-1903 and you'll get a real answer, not a chatbot.

Where are you located?

9393 Trade Pl, San Diego, CA. Come visit the shop, we'd love to show you around.

Does Sandy Vans offer financing?

Yes. Many financing options are available. Set up a call with a sales associate to learn more.

Still have a question? Email the team and you'll get a real answer.