The top choice for Sprinter van owners seeking reliable black water storage is a robust, purpose-built holding tank designed for waste/gray water use only. This guide highlights five proven options, explains who each is best for, and helps you compare capacity, installation, and installation notes. Ideal buyers include DIY van builds, RV enthusiasts, and trailer owners who need dependable waste-water storage with straightforward venting and inlet requirements. Below, a quick table summarizes key specs to help you decide at a glance.
| Product | Brand | Tank Capacity | Best For |
|---|---|---|---|
| WT-1272 12 Gallon Black Water Tank | classAcustoms | 12 gallons | Compact Sprinter Vans and small campers |
| WT-1653 16 Gallon Black Water Tank | classAcustoms | 16 gallons | Mid-size RVs, trailers, and campers |
| T-3452 34 Gallon Fresh/Gray Water Tank | classAcustoms | 34 gallons | Sprinter Cargo/RV setups needing fresh or gray water storage |
| WT-1400 14 Gallon Black Water Tank | classAcustoms | 14 gallons | Smaller vans with black water storage needs |
| WT-2800 28 Gallon Black Water Tank | classAcustoms | 28 gallons | Medium-to-large Sprinter setups |
classAcustoms WT-1272 12 Gallon Black Water Tank
12 Gallon RV Waste Water Holding Tank made in the USA by Class A Customs using MDPE resin. Not for fresh water; for waste/gray water only. This tank is commonly installed in Dodge Promaster, Sprinter vans, RVs, campers, trailers, and tiny houses. The outlet is a fixed 3” ABS fitting; inlet and vent placements are user-determined. Venting is required. Do not pressurize the tank, and avoid over-tightening fittings to prevent damage.
Best for small to mid-sized Sprinter vans or compact campers that require a dedicated black water storage solution with a simple 3” outlet. Choose this if space is tight and you want a USA-made option; avoid this if you need built-in inlet/vent hardware included.
Note: Dump valves are not included and must be added to the downstream piping; hardware is not included.
classAcustoms WT-1653 16 Gallon Black Water Tank
16 Gallon Waste Water Holding Tank built for RVs, campers, trailers, and tiny houses. Made in the USA with MDPE resin; waste/gray water only. The 3” ABS outlet is fixed in place and the user determines inlet/vent placements. Venting is required; do not pressurize. Hardware is not included, and fittings should not be over-tightened to prevent damage.
Best for mid-size vans or larger campers needing more capacity without a large footprint. Choose this if you want a balance between space and volume; better for those with room for longer tanks, and avoid if you need pre-installed inlet/vent fittings included.
Class A Customs T-3452 34 Gallon Fresh/Gray Tank
34 Gallon tank able to store fresh or gray water. Constructed from NSF-approved materials, it is safe for drinking water storage when used for non-potable uses. Dimensions are approximately 42” long by 21” high by 13” wide. It includes internal fittings (one 1.5″ NPT and three 0.5″ fittings). The end user must determine inlet/vent placement. Do not over-tighten fittings; venting is required.
Best for Sprinter Cargo or larger van setups needing substantial water storage, versatile for fresh or gray water. Choose this if you want greater volume and non-potable-to-potable flexibility; avoid if you need a self-contained kit with all fittings included.
RV Fresh Water Tank for Sprinter 2500 & Transit
33-Gallon non-standard wheel-well water tank designed for Sprinter 2500 and Transit vans. It focuses on fresh water storage with an emphasis on space efficiency by utilizing wheel-well space. The design supports a compact footprint and reliable water supply for extended trips. Installation details include locating the inlet and vent as needed.
Best for fresh water storage in compact vans with wheel-well space optimization in mind. Choose this if you prioritize fresh water capacity over black water storage; avoid if you need a dedicated black water tank.
TORVA Sptinter 2500 & Transit 33-Gallon Water Tank
33-Gallon water tank engineered for Sprinter 2500 and Transit vans. It emphasizes space optimization by utilizing areas over the wheel well and offers flexible placement for convenient installation. This tank is designed to fit van contours and provide a practical water storage solution for road trips.
Best for those who want to maximize space while adding substantial water capacity. Choose this if wheel-well placement is key; avoid if you need a dedicated black water tank or pre-installed fittings.
Class A Customs WT-1400 14 Gallon Black Water Tank
14 Gallon RV Waste Water Holding Tank made in the USA with MDPE resin. For waste/gray water only, featuring a fixed 3” ABS outlet. Dump valves are not included and must be added downstream. Inlet and vent positions are user-determined; the tank must be vented. Do not pressurize, and avoid over-tightening fittings.
Best for mid-sized vans needing a straightforward, smaller black water solution. Choose this if you want a light tank with a fixed outlet, and avoid if you require an all-in-one kit with included hardware.
classAcustoms WT-2800 28 Gallon Black Water Tank
28 Gallon Waste Water Holding Tank built in the USA from MDPE resin. Designed for waste/gray water only, with a fixed 3” ABS outlet. Inlet and vent locations are user-determined, and hardware is not included. The tank must be vented; do not pressurize or over-tighten fittings.
Best for larger Sprinter builds needing substantial black water capacity. Choose this if you need higher volume while maintaining a compact footprint; avoid if you’re working with a very tight space or require a kit with all fittings.
Buying Guide: Key Purchase Considerations
Capacity vs. space: Higher gallons provide longer between dumps but require more mounting space. Match capacity to your van’s size and anticipated travel duration.
Material and safety: MDPE is common for waste tanks; NSF-approved options exist for fresh water tanks. Ensure the tank is clearly labeled for waste/gray water use only if applicable.
Installation: Most tanks require user-determined inlet/vent locations. Plan venting and piping routes ahead of time; check that fittings are not over-tightened to avoid damage.
Outlets and valves: Fixed 3” outlets are typical; confirm compatibility with your dump valves and downstream piping. Hardware and valves are often sold separately.
Maintenance and durability: Look for tanks designed for rugged use in vans and motorhomes. Consider the ease of cleaning and accessibility for vent/dump valve maintenance.
FAQ
- What is the difference between black water and gray water tanks?
Black water tanks hold toilet waste, while gray water tanks hold wastewater from sinks and showers. - Do these tanks come with all fittings?
Most lists indicate that hardware is not included; you’ll need to source inlet, vent fittings, and dump valves separately. - Can I install these tanks myself?
Yes, but plan for venting, inlet placement, and piping; verify that you won’t exceed suggested pressure or tighten fittings excessively. - Which tank is best for a compact Sprinter van?
The 12-gallon WT-1272 is often ideal for tight spaces; larger tanks improve capacity but require more mounting room. - Is fresh water storage addressed by these tanks?
Some tanks (like T-3452) can store fresh or gray water, but many listed here are specifically for waste/gray water.