Heavy Duty Water Tank Trucks For Sale

About Water Tank Trucks

Used in the construction, landscaping, mining, and oil and gas industries as well as municipal applications and by other organizations, water tank trucks are vocational trucks used to compact soil, control dust, fight and prevent fires, water trees and other vegetation, fill swimming pools, provide potable water in emergencies, and more.

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2026 Freightliner Business Class M2 106 Water Tank Truck

Water Tank Truck Sizes & Capacities

New and used water tank trucks are often categorized according to their tank capacity and truck size, and as with other tank truck varieties, many, if not most, are medium- and heavy-duty models with gross vehicle weights (GVWs) ranging from 14,000 to more than 26,000 pounds (6350 to more than 11,793 kilograms). Medium-duty models typically have tanks with capacities of around 2,000 gallons (7,500 liters).

The tanks on water tank trucks are available in aluminum, steel, or plastic varieties, typically incorporating multiple compartments to help stabilize the load during transfer. The water tanks are almost always cylindrical or elliptical to maximize capacity, stability, and durability, as well as ease of cleaning. Freightliner’s Business Class M2 106, one of the most popular water tank truck models, can be equipped with a 2,000-gal steel water tank with a modified ellipse design and large-radius corners.

Water Truck Features

Depending on the model and its intended use cases, a water tank truck may include the following features:

• Front and rear spray bars
• Front, side, and back spray heads
• Spray and mist nozzles
• Water cannons
• Quick dump or gravity dump capabilities
• Automatic, manual, and spring-loaded hose reels
• External water pumps
• Self-loading capabilities
• Off-highway tires for rougher terrain
• Fill pipes 
• Power take-off (PTO)
• A self-contained pump engine or hydraulic drive system
• Pressurization capabilities