Whether you need clean water for camping, off-road trips, or a job site, a small water tank that fits in your truck bed is a convenient solution. We researched the top options on the market, comparing their construction, capacity, portability, and real-world owner feedback. This guide covers seven of the best small water tanks, with honest evaluations of their strengths and weaknesses to help you choose the right one for your needs.
| Photo | Product | Score | Buy |
|---|---|---|---|
 |
Rugged Mountain 7 Gallon Portable Water Tank Best Overall 7 gallon capacity, BPA-free polyethylene, integrated spigot |
9.0 | 🛒 Check Price |
 |
Front Runner 40 Liter Water Tank Best Premium 10.5 gallon capacity, UV-resistant, low-profile design |
8.7 | 🛒 Check Price |
 |
WaterPORT 7 Gallon Water Storage Container Best Portable 7 gallon capacity, includes shower hose and spray nozzle |
8.4 | 🛒 Check Price |
 |
Scepter 5 Gallon Military Water Can Best Durability 5 gallon capacity, military-grade HDPE, meets NATO standards |
8.8 | 🛒 Check Price |
 |
Road Shower 5 Gallon Portable Water Tank Best for Showers 5 gallon capacity, solar heating, 12V pump |
8.1 | 🛒 Check Price |
 |
Wagan 8 Gallon Water Tank with Spigot Best Value 8 gallon capacity, BPA-free, built-in spigot |
7.8 | 🛒 Check Price |
 |
Coleman 5 Gallon Water Carrier Best Budget 5 gallon capacity, foldable, includes spigot |
7.3 | 🛒 Check Price |
1. Rugged Mountain 7 Gallon Portable Water Tank: Best Overall
The Rugged Mountain 7 Gallon Portable Water Tank earns our top spot after comparing its build quality, owner feedback, and overall value. Made from BPA-free, food-grade polyethylene, this tank is rugged enough for off-road use and safe for drinking water. The integrated spigot is reliable and easy to use, though some owners note it is a bit slow for tasks like filling a large pot quickly. The molded handles make it comfortable to carry even when full, and the rectangular shape fits neatly in most truck beds without sliding around.
That said, the 7-gallon capacity is modest, so this tank is best for solo campers or short trips. If you need more water for a family or extended off-grid stays, you may want a larger option. We also recommend securing the tank with straps during transport, as it is not designed with tie-down points. Overall, it is a solid, no-fuss water tank that delivers on its promise.
- BPA-free, food-grade polyethylene construction
- Integrated spigot with easy on/off valve
- Molded handles for easy carrying when full
Pros: Durable and leak-proof design; Easy to fill and dispense water
Cons: Spigot can be slow for high-flow needs
2. Front Runner 40 Liter Water Tank: Best Premium
The Front Runner 40 Liter Water Tank is a premium choice for serious overlanders. In our evaluation, its UV-resistant construction and low-profile design stand out, allowing it to fit under most tonneau covers without sacrificing bed space. Owner feedback highlights its robust build and the included brass fittings that resist corrosion. The tank is also designed with mounting points for secure installation.
However, the premium comes at a cost, and this tank is significantly more expensive than others with similar capacity. Additionally, the rectangular shape can be awkward to fill in some setups, and the lack of a built-in spigot means you need to purchase a pump or faucet separately. We recommend this for dedicated off-roaders who prioritize durability and space efficiency over budget.
- UV-resistant, heavy-duty polyethylene
- Low-profile shape fits under tonneau covers
- Includes brass fittings and mounting hardware
Pros: Extremely durable and UV-resistant; Space-saving low profile
Cons: Expensive compared to similar capacity tanks
3. WaterPORT 7 Gallon Water Storage Container: Best Portable
The WaterPORT 7 Gallon Water Storage Container is a favorite among campers who need more than just drinking water. It features a 12V pump that provides pressurized water, perfect for a quick shower or washing dishes. The included hose and spray nozzle add convenience. In our research, owners appreciate the collapsible design that stores flat when empty, saving space. The value is excellent for the functionality offered.
On the downside, the pump is somewhat loud, and it requires a 12V connection (cigarette lighter) to operate, which can drain a vehicle battery if used extensively. The plastic fittings are not as durable as brass, and some users report leaks after prolonged use. This tank is ideal for weekend campers who want a portable shower solution, but less suited for heavy-duty, daily use.
- Integrated 12V pump for pressurized water
- Includes shower hose with on/off spray nozzle
- Collapsible design when empty for easy storage
Pros: Versatile for washing and showering; Easy to store when empty
Cons: Pump can be noisy and drains battery
4. Scepter 5 Gallon Military Water Can: Best Durability
The Scepter 5 Gallon Military Water Can is built to survive harsh conditions. Made from military-grade HDPE, it is nearly indestructible and meets NATO standards for water storage. In our evaluation, its durability is unmatched, and owner feedback confirms it can withstand drops, UV exposure, and rough handling. The stackable design with interlocking lugs saves space when carrying multiple cans. It is also FDA compliant for potable water.
However, the 5-gallon capacity is smaller than many other options, and the lack of a built-in spigot means you need to pour or use a separate pump. The pouring spout can also be a bit messy. This can is best for those who prioritize ruggedness and plan to carry multiple cans or use it as a backup water supply. It may not be the best for frequent dispensing.
- Mil-spec HDPE construction, virtually indestructible
- Stackable design with interlocking lugs
- FDA compliant for drinking water
Pros: Extremely tough and durable; Proven military reliability
Cons: Small capacity for some users; No built-in spigot
5. Road Shower 5 Gallon Portable Water Tank: Best for Showers
The Road Shower 5 Gallon Portable Water Tank is designed specifically for outdoor showers. Its black exterior absorbs sunlight to warm the water inside, a feature many owners love for camping. The included 12V pump and spray nozzle offer good pressure. In our research, it is easy to mount with the provided brackets and fits well in a truck bed.
However, the plastic construction is not as robust as some competitors, and there are reports of the tank developing cracks after extended UV exposure. The pump is also a common failure point, with some users needing replacements. This tank is a good choice for occasional campers who want a simple shower setup, but we suggest skipping it for frequent off-road use where durability is critical.
- Black tank absorbs solar heat for warm showers
- 12V pump with adjustable spray nozzle
- Includes mounting brackets for truck bed
Pros: Provides warm water in sunny conditions; All-in-one shower solution
Cons: Plastic can become brittle over time; Pump may fail after repeated use
6. Wagan 8 Gallon Water Tank with Spigot: Best Value
The Wagan 8 Gallon Water Tank offers a large capacity at a very accessible price point. In our comparison, it provides good value for those on a tight budget. The built-in spigot is convenient, and the BPA-free plastic is safe for drinking. Owners appreciate the straightforward design and the ability to store up to 8 gallons without breaking the bank.
However, the plastic is noticeably thinner than premium tanks, and several owners report cracks after a few trips, especially if left in direct sunlight. The spigot can also develop leaks after repeated use. We recommend this tank for occasional use or for those who are careful to store it out of the sun. It is not built for heavy-duty or long-term use, and we suggest spending more for a durable option if you need reliability.
- Large 8-gallon capacity at a budget-friendly price
- BPA-free plastic, safe for drinking water
- Convenient built-in spigot with twist valve
Pros: Generous capacity for the price; Simple and functional design
Cons: Thinner plastic prone to cracking; Spigot may leak over time
7. Coleman 5 Gallon Water Carrier: Best Budget
The Coleman 5 Gallon Water Carrier is a classic budget option that has been around for years. It is lightweight and folds flat when empty, making it easy to store. The built-in spigot works reasonably well for basic needs. In our research, it is one of the most affordable ways to carry water in a truck bed.
However, the thin plastic and seam construction are prone to leaking, especially if overfilled or exposed to heat. Many owners report leaks after a few uses, and the material can become brittle in cold weather. This carrier is best for emergency use or very occasional trips where you can monitor it. We do not recommend it for regular off-road use or for carrying drinking water long-term.
- Foldable design for compact storage
- Built-in spigot for easy dispensing
- Lightweight and easy to carry
Pros: Very affordable; Stores flat when empty
Cons: Prone to leaks at seams; Not suitable for hot climates
Frequently Asked Questions
What size water tank is best for a truck bed?
The best size depends on your needs. For solo camping or short trips, 5-7 gallons is usually enough. For families or extended off-grid stays, consider 10-15 gallons. Keep in mind that water weighs about 8.3 pounds per gallon, so a full 10-gallon tank adds over 80 pounds to your payload.
Can I use these tanks for drinking water?
Most tanks are made from food-grade, BPA-free polyethylene and are safe for drinking water. Always check the product specifications to ensure it is FDA or NSF certified for potable water. Some tanks, like the Scepter military can, are explicitly designed for drinking water.
How do I secure a water tank in my truck bed?
Use ratchet straps or bungee cords to secure the tank to tie-down points in your truck bed. Some tanks come with mounting brackets or have molded slots for straps. Avoid letting the tank slide around, as it can damage the bed or the tank itself.
Do these tanks come with a pump or spigot?
Some tanks include a built-in spigot (like Rugged Mountain and Wagan), while others require a separate pump or faucet (like Front Runner and Scepter). If you need pressurized water for a shower, look for a tank with an integrated 12V pump, such as the WaterPORT or Road Shower.
How do I clean and maintain a water tank?
Rinse the tank with a mild bleach solution (1 teaspoon per gallon of water) and let it sit for 15 minutes, then rinse thoroughly. Avoid using soap, as it can leave residue. Store the tank empty and dry to prevent mold and bacteria growth. Some tanks are dishwasher safe on the top rack, but check the manufacturer instructions.
Our Verdict
After comparing build quality, owner feedback, and overall value, the Rugged Mountain 7 Gallon Portable Water Tank is our top pick for most truck owners. It offers a good balance of durability, ease of use, and safety at a reasonable price. For those who need a more rugged solution for off-road adventures, the Scepter 5 Gallon Military Water Can is an excellent runner-up, offering unmatched toughness and reliability.
Last reviewed and spec-checked: June 16, 2026. We re-check our picks and listings periodically.
