400 Gallon Rectangular Truck Bed Water Tank

400 Gallon Rectangular Tank for Truck Beds or Water Storage

This 400-gallon rectangular tank is a compact, heavy-duty solution designed for mobile water transport—its most common use—but it’s also capable of safely storing food-grade liquids, agricultural chemicals, and other non-corrosive industrial fluids. Made from FDA-approved, BPA-free polyethylene and molded as a single solid piece, it ensures long-lasting durability and leak-free performance. The low, wide profile provides excellent stability during transport and fits securely in most full-size truck beds or trailers. UV-stabilized to resist sun damage, this tank is ideal for farms, job sites, off-grid locations, or any operation that requires safe, efficient liquid handling on the move.

Pro Tip: If you plan to transport liquid in this tank, we recommend the optional hold down bands! The hold down bands include 2 steel bands, 4 J-hook bolts with washers and nuts. They are not required for stationary use.

400 Gallon Water Tank Specifications

• Technical Drawing
• 5-Year Warranty
• Complies with U.S. Food and Drug Administration regulation 21CFR 177.1520 (1) 3.1 and 3.2 for storage of potable water. 
• Capacity: 400 gallons
• Material: High Density Polyethylene (HDPE)
• Lid: 8" threaded vented lid (16" vented lid available upon request)
• Outlet Fitting: 2" female NPT fitting (located on long or short side)
• Color: Translucent white (easy to monitor fill level)
  
• Weight: 165 pounds
• Length: 80"
• Width: 48"
• Height: 29"
• This 80″ tank is designed for standard 6.5′ truck beds. It fits best with the tailgate down and may extend slightly in shorter beds (78″). Always secure with straps for safe transport.

Shipping & Delivery

• Freight Shipping Class: LTL / 300
• Shipping Weight: 215 lbs.
• Length: 48"
• Width: 48"
• Height: 84"
• Ships on an 48x48 pallet and is shrink wrapped for protection
• Ships from Caldwell, Idaho - free in-store pickup option available

We recommend reaching out to us at info@ewatertank.com for a customized quote.

We also offer a free in-store pick up option from 307 Evans St, Caldwell, ID 83605. Pick up must be scheduled with us after order placement.

Prior to delivery, please ensure access to the tank site and make sure the location of the tank is level and clear of any obstructing materials.

For more information, see our shipping & delivery page or contact us with any questions.