Finding a reliable water storage solution for a truck, RV, or concession vehicle means balancing capacity, material safety, and installation flexibility. While many options max out at 125 gallons, these picks illustrate the best-performing large-capacity and versatile tanks available from trusted manufacturers. This guide covers tanks suitable for fresh or gray water, with ribbed or reinforced designs for added strength and compatibility with truck plumbing. Use this overview to compare capacities, fittings, and mounting flexibility before choosing a setup that meets your operating needs.
| Product | Capacity | Material | Notable Feature |
|---|---|---|---|
| Class A Customs T-12500 | 125 gallons | NSF approved materials | Ribbed for extra support; multiple fittings |
| Class A Customs T-10000 | 100 gallons | NSF approved materials | Ribbed construction; flexible orientation |
| RomoTech 60 Gallon Tank | 60 gallons | PE; UV-resistant | Legs; versatile storage |
| RecPro Combo Pack 21 & 30 Gallon | 21 & 30 gallons | NSF; Made in America | Pressure tested |
| RecPro Combo Pack 10 & 16 Gallon | 10 & 16 gallons | NSF; Made in America | Pressure tested; cleaning guidance |
Class A Customs T-12500 125-Gallon Tank
The Class A Customs T-12500 is a 125-gallon freshwater or gray water holding tank designed for RV and mobile applications. Constructed from NSF-approved materials, it is suitable for drinking water and non-potable storage. The tank measures approximately 64.5 inches in length, 18 inches wide, and 26.25 inches tall, with six 1.5″ female NPT fittings and two 0.5″ fittings. A ribbed exterior provides extra structural support, aiding in long-term durability when installed on trucks or RV frames. The design accommodates multiple mounting orientations, which helps with tight installations in vehicles of varying dimensions. Note: slight manufacturing tolerances apply, and proper fitting installation is essential to prevent leaks.
Key references from the listed features include the double-fitted NPT configuration for flexible plumbing, the ability to sit on any side, and the ribbed construction that enhances rigidity. For operators considering high-capacity water storage on a vehicle, this tank offers a balance between size and install flexibility, especially in conjunction with a robust plumbing kit and appropriate venting. When using this tank, ensure you follow the included guidance on fittings and avoid overtightening threaded connections to protect the tank’s integrity.
Class A Customs T-10000 100-Gallon Tank
The Class A Customs T-10000 is a 100-gallon freshwater or gray water holding tank with ribbed construction for added support. Approved for NSF materials, this tank is suitable for fresh or drinking water applications and is designed to fit various RV and truck configurations. The dimensions are designed to maximize usable space with a long-length orientation of about 50 inches, plus a width around 18 inches and height near 26 inches. The included fittings consist of six 1.5″ female NPT ports and two 0.5″ ports, all sealed for water-tight operation. As with other Class A Customs tanks, the model supports rotating the orientation to suit different vehicle layouts, which is advantageous for installation in tighter trucks or trailers.
Operating notes emphasize the importance of proper membrane removal for fittings, careful assembly to avoid leaks, and avoiding over-tightening. This tank provides a practical, mid-range option when a 125-gallon capacity is more than needed but a larger tank is still desirable for extended trips or commercial mobile setups.
RomoTech 60-Gallon Polyethylene Storage Tank
The RomoTech 60-gallon tank offers a heavy-duty polyethylene storage solution suitable for potable water, agricultural liquids, or non-flammable industrial substances. Built from UV-stabilized, BPA-free plastic, this tank resists outdoor weathering and maintains water quality over long periods. The tank includes a domed top design to reduce pressure points and facilitate cleaning, while its legged base allows for easy leveling and mounting on uneven truck floors or frames. While not as large as 100+ gallon models, this unit provides reliable storage with robust materials for fleet or farm applications where space and weight distribution are critical considerations.
RecPro Combo Pack 21 & 30 Gallon Tanks
RecPro offers a two-tank combo set featuring 21 and 30 gallon options, designed for mobile or concession use. The tanks are NSF approved, manufactured in America, and subjected to pressure testing to ensure reliability in demanding environments. While smaller in capacity, these tanks can be used for auxiliary water storage, rinsing systems, or as part of a modular tank setup in food trucks and mobile kitchens. The pair provides flexibility to allocate water storage across different zones of a vehicle, helping to manage weight distribution and drainage without committing to a single large reservoir. Operators should sanitize tanks before first use and maintain proper venting and hose connections to prevent pressure buildup.
RecPro Combo Pack 10 & 16 Gallon Tanks
This RecPro option pairs 10 and 16 gallon tanks, offering compact storage for auxiliary systems or as a supplementary reservoir in mobile setups. The tanks are pressure-tested and made in America, with guidance to clean tanks before initial use to avoid contamination. They are best suited for lightweight applications or areas where space constraints limit larger tanks. The small footprint makes them ideal for specialized truck installations where additional, easily replaceable water storage is beneficial, such as beverage or cleaning stations on a concession vehicle.
Class A Customs T-2000-BPK-PUMP 20-Gallon Tank With Pump
The Class A Customs 20-gallon tank includes plumbing kit and a 12-volt pump, offering a compact yet complete freshwater solution for mobile setups. While smaller than a full 125-gallon system, this unit provides an integrated option for jobs requiring a ready-to-use water supply with pumping capabilities. The tank is NSF-approved and designed for drinking water safety, with fittings that are sealed and watertight when installed properly. This option is favorable for operators who need a compact, portable water source that can be mounted or relocated easily within a truck or trailer.
Buying Guide: Key Purchase Considerations for Truck Water Tanks
- Capacity and use case: For truck or concession use, a mix of larger primary tanks and smaller auxiliary tanks can optimize weight distribution and water management.
- Material and safety: NSF-approved materials ensure suitability for drinking water and reduce contamination risk. Consider BPA-free plastics and UV resistance for outdoor applications.
- Fittings and installation: Count the required number and size of fittings (commonly 1.5″ NPT) and verify compatibility with your hoses and valves. Ensure proper venting for non-pressurized tanks.
- Mounting orientation: Tanks that are rotatable or flexible in mounting orientation help fit in varied vehicle layouts, especially in compact trucks or RVs.
- Maintenance and cleaning: Tanks should be easy to access for cleaning, disinfecting, and routine inspection. Check manufacturer guidance on cleaning and membrane removal for fittings.
- Durability and external protection: Ribbed or reinforced designs offer added structural integrity for road vibrations, while UV-stable plastics resist sun exposure on fleets.
- Regulatory and safety standards: Prioritize components that are pressure-tested and built to meet industry standards for mobile water storage.
When selecting a tank for a truck-based water system, consider a modular approach: a primary high-capacity tank for main storage combined with smaller auxiliary tanks for distribution, rinsing, or emergency reserves. Ensure compatibility with your vehicle’s space, weight limits, and plumbing layout. Always validate fittings, venting, and installation hardware to maintain leak-free operation in mobile environments.