The Enduraplas 500 Gallon Plastic Horizontal Leg Tank (SKU THF00500BK, a black tank per its SKU designation) is a cylinder-on-its-side built to move liquid on a trailer or skid rather than sit in a corner. The molded legs run the length of the barrel so the tank rests flat and stable when strapped down, and the low 44-inch profile keeps the center of gravity down when the load shifts on the road. Measured across the barrel it stands 44 inches tall, 57 inches wide, and 70 inches long, giving a 57.0 x 70.0-inch footprint that maps cleanly onto a standard utility or sprayer trailer deck. These dimensions are verified, so you can build a frame or lay out a trailer bed before the tank arrives.
Will it work for your setup?
Filled to its rated 500 gallons of water, this horizontal leg tank carries about 4,170 pounds. That number matters more here than on a stationary vertical, because the weight rides on your trailer axles and hitch, not a slab. Plan the load path around it: roughly 4,170 pounds over the 57 x 70-inch footprint at 1.0 specific gravity, and anything denser scales straight up from there (a 1.2 SG liquid pushes the same 500 gallons to about 5,000 pounds). Size your trailer, tie-downs, and tow rating to that full weight, not the empty tank, and confirm your deck spans the full 70-inch length so the legs are supported end to end. If you are unsure the 500-gallon size matches your haul cycle, run the numbers through the Tank Sizing Calculator and the Tank Sizing Guide before you commit.
What to confirm before you buy
Two specs a transport buyer needs are not published in our data for this unit, and we would rather flag them than let you guess. First, the specific-gravity rating is not listed — confirm the SG limit with us at 866-418-1777 before hauling anything heavier than water (1.0 SG). Second, outlet, fill-lid, and gasket details are not in our spec data — confirm the port sizes and gasket compatibility before you plumb your trailer. A quick call settles both.
The mistake to avoid
Leg tanks are transport tanks, and what you haul decides whether this one is right. Water and light-density liquids are a straight fit. Heavier agricultural liquids like fertilizer blends carry more weight per gallon and can stratify or settle in a horizontal barrel, which changes both your load math and your mixing routine — the reason the SG rating above is worth a phone call. Before you fill it with anything denser than water, it helps to understand how applicator and leg tanks are scoped and how blends behave in transit: this guide on applicator and leg tanks and DOT non-roadable trailer scope and this one on fertilizer-blend stratification and field verification cover the physics; note both are written around Norwesco equipment, so treat them as background on the category rather than spec for this Enduraplas tank. For farm-fleet road use, the 49 CFR 173.5 agricultural exemption guide explains how portable utility tanks are classified.
This tank ships LTL freight. Get a rate quoted to your ZIP with the Freight Cost Estimator, or call 866-418-1777 and we will quote the freight and confirm the tank fits your trailer before it leaves the dock.
