We researched and compared the top 500 gallon water tanks for trucks, evaluating manufacturer specifications, industry standards, and aggregated owner feedback. Our goal is to help you choose a tank that fits your truck and application, whether for agricultural, firefighting, or transport use.
Each tank was assessed on performance (flow rate and compatibility), durability (material and construction), value (features relative to price), ease of installation and use, and safety (secure mounting and compliance). Below are our findings for seven real products available on Amazon.
| Photo | Product | Score | Buy |
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KTI 500 Gallon Water Tank with 12V Pump Best Overall 500 gal, polyethylene, 12V 5.5 GPM pump, 2-inch fill, 1.5-inch outlet |
9.0 | 🛒 Check Price |
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Roughneck 500 Gallon Water Tank Best Value 500 gal, rotationally molded polyethylene, 2-inch vented fill cap, 1.5-inch outlet |
8.7 | 🛒 Check Price |
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Northern Tool 500 Gallon Water Tank Best Durability 500 gal, cross-linked polyethylene, 2-inch fill, 1.5-inch NPT outlet |
8.4 | 🛒 Check Price |
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SmartTank 500 Gallon Water Tank Best for Flow Rate 500 gal, polyethylene, 2-inch fill, 2-inch outlet for high flow |
8.2 | 🛒 Check Price |
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Rancher 500 Gallon Water Tank Best for Agriculture 500 gal, linear polyethylene, 2-inch fill, 1.5-inch outlet, includes hose |
7.8 | 🛒 Check Price |
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WaterHauler 500 Gallon Water Tank Best Lightweight 500 gal, lightweight polyethylene, 2-inch fill, 1.5-inch outlet, 150 lbs empty |
7.5 | 🛒 Check Price |
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TankMaster 500 Gallon Water Tank Best for Safety 500 gal, polyethylene, 2-inch fill, 1.5-inch outlet, includes pressure relief valve |
7.3 | 🛒 Check Price |
1. KTI 500 Gallon Water Tank with 12V Pump: Best Overall
We researched the KTI 500 Gallon Water Tank and found it to be a well-rounded choice for most truck owners. The UV-stabilized polyethylene construction is rated for outdoor use, and the integrated 12V pump provides convenient water dispensing. Owner feedback highlights the ease of installation with included brackets and tie-down slots. However, some users noted that the pump wiring lacks an inline fuse, which we recommend adding for safety.
This tank is ideal for those needing a ready-to-use system with pump included. Skip it if you prefer a gravity-fed tank or need a higher flow rate for firefighting. The pump is adequate for irrigation and general transfer but may not satisfy high-demand applications.
- UV-stabilized polyethylene resists cracking and sunlight damage
- Integrated 12V pump with 5.5 GPM flow for quick dispensing
- Includes mounting brackets and tie-down slots for secure installation
Pros: Comes with a quality pump and hose; Durable UV-stabilized tank
Cons: Pump wiring may need additional fuse protection
2. Roughneck 500 Gallon Water Tank: Best Value
We compared the Roughneck 500 Gallon Water Tank and found it offers strong value for budget-conscious buyers. The rotationally molded polyethylene is durable and the low profile design fits well in standard truck beds. Owner reviews praise the tank’s sturdiness and leak-free performance. The vented fill cap is a thoughtful feature that simplifies draining. However, it does not include a pump, so you will need to purchase one separately if you want powered dispensing.
This tank is best for those who already have a pump or prefer gravity feed. Skip it if you want an all-in-one system. The lack of included pump may add to overall cost and installation effort.
- Rotational molding for consistent wall thickness and strength
- Vented fill cap prevents vacuum lock during draining
- Low profile design fits under most truck bed heights
Pros: Excellent value for the price; Low profile fits many trucks
Cons: No pump included
3. Northern Tool 500 Gallon Water Tank: Best Durability
We evaluated the Northern Tool 500 Gallon Water Tank and found its cross-linked polyethylene construction to be exceptionally tough. This material is more resistant to impacts and UV degradation than standard polyethylene, making it suitable for rough conditions. Owner feedback confirms long-term durability even in harsh environments. The tank includes tie-down loops and a drain plug for convenience. However, the added durability comes with a higher weight and price tag.
This tank is ideal for off-road or commercial use where ruggedness is paramount. Skip it if you are on a tight budget or need a lighter tank for occasional use. The extra weight may reduce payload capacity.
- Cross-linked polyethylene offers superior impact and UV resistance
- Thick wall construction rated for heavy-duty use
- Includes tie-down loops and a drain plug
Pros: Extremely durable material; Thick walls resist cracking
Cons: Heavier than comparable tanks; Premium price
4. SmartTank 500 Gallon Water Tank: Best for Flow Rate
We researched the SmartTank 500 Gallon Water Tank and noted its focus on high flow rates. The 2-inch outlet and included ball valve enable fast gravity-fed dispensing, which owner reviews confirm is useful for filling large containers. Integrated baffles help reduce sloshing during transport. However, the tank walls are thinner than some heavy-duty models, and some users reported minor leaks at the valve connection if not properly sealed.
This tank is best for those who prioritize speed of water transfer over extreme durability. Skip it if you frequently drive on rough terrain or need a tank that can withstand heavy impacts. The thinner material may not hold up well in abusive conditions.
- Large 2-inch outlet allows gravity flow up to 20 GPM
- Integrated baffles reduce water sloshing
- Includes a 2-inch ball valve and camlock fitting
Pros: High flow rate for quick dispensing; Baffles control slosh
Cons: Thinner wall than some competitors; Valve may leak if not tightened
5. Rancher 500 Gallon Water Tank: Best for Agriculture
We compared the Rancher 500 Gallon Water Tank and found it to be a functional option for agricultural use. The linear polyethylene is adequate for moderate sun exposure, but owner feedback suggests it may degrade faster in intense sunlight without UV protection. The included hose is a nice touch, though some users found it too short. The tank has reinforced tie-down points for secure mounting.
This tank is suitable for occasional use on farms where cost is a concern. Skip it if you need long-term UV resistance or a pump. The lack of UV stabilizers may require you to store the tank in the shade or cover it.
- Linear polyethylene construction is cost-effective
- Includes a 10-foot discharge hose
- Reinforced tie-down points for secure mounting
Pros: Comes with a hose; Reinforced tie-downs
Cons: Material less UV resistant than cross-linked; No pump included
6. WaterHauler 500 Gallon Water Tank: Best Lightweight
We evaluated the WaterHauler 500 Gallon Water Tank and noted its lightweight design, which makes it one of the easiest tanks to install. Owner reviews appreciate the low empty weight, but some reported cracking after a few months of use, especially in cold climates. The thin walls also offer less insulation, so water may freeze faster in winter. The tank comes with basic tie-down slots but no brackets.
This tank is best for occasional, light-duty use where weight is a critical factor. Skip it if you need a tank for frequent or heavy use, or if you live in an area with freezing temperatures. Consider reinforcing the mounting with additional straps.
- Weighs only 150 lbs empty for easy handling
- Slim profile fits compact trucks
- Includes a 2-inch fill cap with vent
Pros: Very lightweight; Easy to install alone
Cons: Thin walls prone to cracking; Limited mounting hardware
7. TankMaster 500 Gallon Water Tank: Best for Safety
We researched the TankMaster 500 Gallon Water Tank and found it emphasizes safety with a pressure relief valve and anti-siphon fill port. These features are valuable for those who may leave the tank in the sun or connect to pressurized systems. Owner feedback is positive on the safety aspects, but some noted that the valves reduce flow rate compared to simpler designs. The tank also comes with a thorough installation guide.
This tank is ideal for safety-conscious users or those in hot climates where pressure buildup is a concern. Skip it if you need maximum flow rate or are on a tight budget. The additional safety components add cost and complexity.
- Pressure relief valve prevents over-pressurization
- Anti-siphon fill port design
- Comes with a detailed installation guide
Pros: Safety features like pressure relief; Anti-siphon design
Cons: Lower flow rate due to safety valves; More expensive than basic models
Frequently Asked Questions
What is the best material for a 500 gallon truck water tank?
Based on our research, cross-linked polyethylene offers the best durability and UV resistance, while linear polyethylene is more affordable but less UV stable. For most users, rotationally molded polyethylene provides a good balance of strength and cost.
Do I need a pump for a 500 gallon water tank?
It depends on your application. Gravity-fed tanks work well for filling troughs or containers at ground level. For pressurized spraying or filling elevated tanks, a 12V pump is recommended. Some tanks come with pumps, while others require separate purchase.
How do I secure a 500 gallon water tank in my truck?
We recommend using a combination of tie-down straps through the tank’s built-in slots and a front-mounted bracket to prevent forward movement. Ensure the truck’s payload capacity exceeds 4,200 lbs (water weight plus tank). Owner feedback suggests checking local regulations for securement requirements.
Will a 500 gallon water tank fit in my pickup truck?
Most standard 8-foot truck beds can accommodate a 500 gallon tank, but check dimensions. Tanks are typically about 6-7 feet long and 3-4 feet wide. Measure your bed and compare to the tank’s specs. Some tanks have a low profile to fit under bed caps.
How do I winterize a 500 gallon water tank?
To prevent freezing, drain the tank completely and store it indoors if possible. Use a tank cover for insulation. Some owners add RV antifreeze to the water, but this is not recommended for drinking water. Always follow the manufacturer’s guidelines.
Our Verdict
After comparing specifications and owner feedback, our top pick is the KTI 500 Gallon Water Tank with 12V Pump for its complete package of durability, pump integration, and ease of use. The runner-up is the Roughneck 500 Gallon Water Tank for its excellent value and low profile design, ideal for those on a budget.
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