The Enduraplas 400 Gallon Sump Bottom Transport Tank arrives as a black horizontal tank set in a steel frame, built for hauling and transferring water where a stable, low-profile footprint matters. It is molded from polyethylene and carries a 1.9 specific gravity rating. Key numbers for spec'ing and route planning:
- Capacity: 400 gallons
- Dimensions: 45 in high x 46 in wide x 74 in long
- Footprint: 46.0 x 74.0 in
- Full-water weight: about 3,336 lb
- Max rated contents weight: about 6,338 lb at 1.9 SG
Will it work for your job
The horizontal, frame-mounted format keeps the center of gravity low for road service and repeated fill-and-haul cycles, and the sump-bottom design gives a dedicated low drain point so the tank empties toward its base rather than leaving liquid stranded. Confirm outlet size and location against the technical drawing on this page before you finalize plumbing. If you are matching this 400 gallon capacity to a fill schedule or comparing footprints against your bed or trailer, run the numbers through our Tank Sizing Calculator and cross-check the Tank Sizing Guide.
The mistake to avoid
The common error with a black horizontal transport tank is treating the 1.9 SG rating as permission for any liquid. That rating governs weight, not chemical compatibility: it means the polyethylene wall is engineered to hold contents up to roughly 1.9 times the weight of water, which is how you reach the 6,338 lb maximum. This is a water and general-transport tank; for any chemical service, verify the specific liquid against a concentration- and temperature-specific resistance chart first. Size your frame support and tie-downs to the full 6,338 lb rated load, not the 3,336 lb water-only figure, so neither the frame nor the vehicle bed is overloaded on a dense fill.
Mounting and transfer service
When the tank sits stationary between hauls, a flat, fully supported base under the frame prevents point loading on the polyethylene. Our guide on concrete pad sizing for above-ground polyethylene tanks covers the base-support principles that apply to frame-set horizontal tanks. For a transfer-and-loadout setup, the loadout pad engineering guide walks through slope, curb, and sump geometry, and if the tank feeds a fire reserve, the fire-water reservoir design guide covers NFPA 22 sizing discipline.
This tank ships LTL freight from the Enduraplas plant in Neche, ND, with cost quoted live to your ZIP. Get your number instantly through our Freight Cost Estimator or call 866-418-1777 to confirm the black horizontal 400 gallon configuration for your route.
