11 Gallon Sprinter Undercarriage Water Tank SP-UC-11

(17 customer reviews)


Fast & Free Shipping in Continental US

In Stock · Ready for Shipment

Made in the USA

TEI Tested & Listed / RVIA Approved

SKU: SP-UC-11 Categories: ,


  • Fits 2007 - Newer Sprinter passenger side under slider door step area.
  • ***Sprinter GAS Engines** Heat Shield (not supplied) from exhaust system should be installed since the exhaust sits closer to the side of the frame on GAS engine Sprinters.
  • Tank can be used for fresh or grey water
  • 11 Gallon Tank
  • Tank is designed not to be pressurised (I.e.  Needs to be vented).
  • Overall dimensions: 37.5"L x 9.25"H x 12.25"W.
  • BPA Free, food grade plastic.
  • Tank has (2) 1.5" NPT port and (2) 1/2" NPT ports on end that will face the rear of van and (1) 1.5" NPT port on top
  • *(2) Stainless steel Brackets, Stainless steel 3/8" hardware, and 3/8" rivnuts included. (17/32" Drill Bit)
  • This will require a rivnut tool. Rivnut tool Not included.
  • Fits with AMP Research power step


  • ***Please allow up to 10 days for processing. ***
  • RETURNS are accepted up to 90 Days if the tank has not been installed or altered in any way.  The tank will need to be shipped back in the box purchased in and tracking information provided.  20% restocking fee.  Customer is responsible for return shipping.
  • Made in the USA

The 11 gallon Sprinter undercarriage tank is designed to fit under the slider door area.  (2) Stainless steel laser cut straps, hardware and rivnuts are included.  Tank fits Mercedes Sprinter 2007-present.  It may fit other makes and models as well.

Item is shipped from Bellingham WA, 98225.

Additional information

Weight 20 lbs
Dimensions 38 × 14 × 10 in

17 reviews for 11 Gallon Sprinter Undercarriage Water Tank SP-UC-11

  1. Jesse F. (verified owner)

    Great quality product fits perfect in the space. Only issue i have is there’s only a 1/2” fitting on the top part of the tank this makes draining your sink and shower super slow. Adding a 1 1/2” fitting to the top or even a 1” fitting would make this product Perfect

    • TylerNW2020 (store manager)

      Hi, we find it best to drain into a lower port for the grey water and using the top 1/2″ port for the vent/ overflow. This creates a natural pee trap and allows the water to flow freely.
      Thank you for the order.

  2. Gary (verified owner)

    I’m very happy with my tank

  3. Anonymous (verified owner)

    Fit and installation are a breeze. The brackets do not come with any protective lining between the tank and bracket so I added a rubber liner to the bracket. It would also be nice to have one 1/2″ FITTING on top of the tank for the breather.

  4. Anonymous (verified owner)

    I’m using this on the driver side, not recommended but definitely possible! Quick delivery, great customer support.

  5. Jeff (verified owner)

    Love this tank. Super easy to mount. I use it as a gray water tank, I would have never thought to empty into the bottom of the tank but it works great.

  6. Nicholas F. (verified owner)

    Love this tank. The customer support is excellent also. Thank you

  7. Anonymous (verified owner)

    Easy to install, reasonable price. Good purchase as far as I am concerned.

  8. Walter (verified owner)

    Great tan, easy install. Only issue is a bit if a slow drain due to lack of drop based on how hise needed to be run from sink to tank. Otherwise it’s great!

  9. Steve MacAulay (verified owner)

    This was the fourth tank I have bought from Northwest Conversions for various sprinter builds and I couldn’t be happier with both the product and the service/shipping. Fits perfectly and the included mounting straps and hardware kit is a really nice addition. Even included a small pack of anti seize! I have tried multiple other brands of tanks and wouldn’t even consider buying them again after using the N.W. Conversion tanks.

  10. Josh Emrich (verified owner)

  11. Todd (verified owner)

    Just wish it was bigger. Unless we put in an amp step there is a lot more room which would have been useful.

  12. Brian Foley (verified owner)

    Fits great, Thank You!

  13. Kevin (verified owner)

    What can I say you get what you pay for and Tyler is offering a really great product lineup that fit perfectly under our Sprinter 144 van. For sure I would and or will be buying more from Tyler when the need arises. I was up against a tight deadline at the end of my build process. I ordered the tanks on a Sunday eve. and was so happy when they arrived Tuesday AM. Granted they were shipped within WA state. But still Fedex and Tyler delivered the goods and at a fair price. Dealing with Tyler was a great experience for me and would assume will be for you as well. He appears to be going above and beyond on all levels that other Van providers just don’t seem to have his drive to deliver great products.

  14. Chris H. (verified owner)

    Love the tank and am using it for grey water. I wish there were an option for metric hardware as I have made substantive efforts to ensure the serviceability of all my systems is aligned with the Mercedes Chassis hardware. This includes an investment in metric tool including my rivnut mandrels. Nothing a quick run to Ace couldn’t remedy. None the less the hardware specifications are in the product description and everything is excellent quality. This is my third Northwest Conversion tank and will buy from them again for future builds.

  15. Kevin (verified owner)

    Fits perfectly and easy to install once step is removed. Would like to have a longer one for my 170WB.

  16. Diane (verified owner)

    I was happy to find a ready-made tank to fit our M/B 170 van in the under-step location. Shipping to Canada worked out fine. The SP-UC-11 water tank, and support straps look like good quality stuff. The ports for filling, venting, level gauge sensor etc are well located. The installation was straight forward and it can be easily lowered for future installation of a level gauge sensor.

  17. David (verified owner)

    Fit perfectly. Mounting brackets are quality stainless steel. Highly recommend.

Add a review

Your email address will not be published. Required fields are marked *