The Norwesco 725 Gallon Black Horizontal Leg Tank is a 725-gallon polyethylene transport tank built for moving liquid on a trailer, skid, or applicator frame and getting it where it needs to go. It measures 101 inches long by 49 inches wide by 54 inches tall, riding on integrated legs that let it sit flat on a flatbed. The black UV-stabilized poly shell carries a 1.5 specific gravity rating, so it is rated to haul liquids up to 1.5 times the weight of water. This is the workhorse footprint farmers and applicators search for when they look up a horizontal leg tank for nurse, fertilizer, or field-transfer duty.
Will it work for your load?
Start with weight, because a haul tank lives or dies on how heavy it gets when full. Filled with plain water (SG 1.0), this tank carries roughly 6,046 pounds of liquid. At its full 1.5 SG rating, maximum rated contents weight climbs to about 9,070 pounds. Size your trailer, axles, and tie-downs to the heavier number if you plan to run dense liquids like fertilizer blends, not to the water figure. The 49 x 101 inch footprint is what you are securing to the deck, so confirm your frame and strap points line up with the leg pattern shown in the technical drawing on this page before you load. Two common transport jobs fit this tank directly: DEF at 32.5% (which requires 316SS fittings, not PVC) and urea solution at 50%, both confirmed compatible with the 1.5 SG poly. Run your numbers through the Tank Sizing Calculator and the Tank Sizing Guide to match capacity to your job and your rig.
Chemical compatibility
This tank is molded in polyethylene at a 1.5 specific gravity rating. The exact resin code is not confirmed in our data, so confirm whether the shell is HDLPE or XLPE with the manufacturer before putting any chemical into service - different resins handle aggressive liquids differently. The factory fitting and outlet configuration is also not listed in our data, so call to confirm bulkhead and outlet size and material before ordering for chemical duty. With the 1.5 SG poly, these chemicals are compatible at the listed concentrations when paired with the right fitting and gasket materials: Acetic Acid at 60% (PP/PVC fittings, EPDM gaskets, details), Aluminum Sulfate at 50% (PVC, EPDM, details), Calcium Chloride at 40% (PVC, EPDM, details), DEF at 32.5% (316SS fittings, EPDM gaskets, details), Ferrous Sulfate at 20% (PVC, EPDM, details), Magnesium Chloride at 30% (PVC, EPDM, details), Sodium Carbonate at 30% (PVC, EPDM, details), Urea Solution at 50% (PP/PVC, EPDM, details), and Ozonated Water up to 10 PPM (PVC, EPDM). Match fittings and gaskets exactly as listed, and always check the OEM chemical-resistance chart for your specific concentration and temperature before committing - those ratings are concentration- and temperature-specific. See our full chemical compatibility resource for the complete picture.
The mistake to avoid: don't overrun the SG rating
The single most common error on a leg tank like this is putting a dense chemical in a tank that is not rated for it. This shell is rated to 1.5 SG. Several liquids that look like a natural fit for a transport tank need a higher 1.9 SG tank instead and should NOT go in this one: Ethylene Glycol, Ferric Chloride, Ferric Sulfate, Hydrochloric Acid, Hydrofluoric Acid, Hydrofluosilicic Acid, Hydrogen Peroxide, Peracetic Acid, Phosphoric Acid, Polyaluminum Chloride, Potassium Carbonate, Potassium Hydroxide, Propylene Glycol, Sodium Bisulfate, Sodium Bisulfite, Sodium Hypochlorite, Sodium Thiosulfate, Sulfuric Acid, and Zinc Orthophosphate. Several of these also need more than EPDM gaskets - Hydrochloric Acid, Hydrofluoric Acid, Hydrofluosilicic Acid, Hydrogen Peroxide, Phosphoric Acid, Sodium Hypochlorite, and Sulfuric Acid call for Viton (with Sulfuric Acid also needing CPVC fittings), while Peracetic Acid calls for Aflas - so check each chemical's page for its exact fitting and gasket spec. If your liquid is on that list, step up to a 1.9 SG tank rather than this one; ordering this shell for that service is a costly mismatch. If you are hauling fertilizer blends, review our guide on fertilizer-blend tank stratification and our breakdown of Norwesco applicator and leg tanks for fertilizer, plus the DOT classification rules for farm fleet use.
This tank ships LTL freight, quoted live to your ZIP code. It is stocked at Norwesco plants in Fairfield, TX; Griffin, GA; Owego, NY; Shawnee, OK; Tooele, UT; and Washington Court House, OH - your order ships from the location nearest you to keep freight down. Get a real number in seconds with our Freight Cost Estimator, or call 866-418-1777 and we will quote the freight, confirm your fittings, and make sure this is the right tank for your liquid before you buy.
