The Enduraplas 300 Gallon Black Horizontal Sump Bottom Leg Tank ships as a horizontal leg tank on an integrated steel frame, rated for a 1.9 specific gravity and built from black polyethylene. At a 46 in. by 74 in. footprint and 36 in. tall, this is a 300 gallon tank designed to sit on a skid, trailer, or service bed rather than stand vertically. The sump bottom is shaped for complete draw-down, which matters when you are running the dense agricultural and industrial liquids this tank is rated for and want to drain it clean rather than leave heel volume behind.
Will it work for your job?
Plan around the loaded weight, not the empty tank. Filled with water this 300 gallon tank carries about 2,502 lb, and at its full 1.9 SG rating the tank and contents reach roughly 4,754 lb. That heavier number is what your frame, trailer axles, and lift equipment have to support, so size the platform to the rated contents weight and not to the water figure. At 74 in. long, the long axis of this horizontal leg tank needs to run fore-aft on a trailer or service bed, and your deck has to carry the point loads at the integrated frame legs rather than assume a flat distributed footprint. The 1.9 specific gravity rating is the high end of the polyethylene range, which is why this tank suits dense liquids that lighter-rated tanks cannot hold. Run the loaded math against your hauling setup with the Tank Sizing Calculator and the Tank Sizing Guide before you commit.
Chemical compatibility
This tank is black polyethylene rated to 1.9 specific gravity. The resin grade is not yet fully confirmed, so confirm HDLPE versus XLPE with us before putting any chemical into service, since that distinction can change what the tank will safely hold over time. Fitting and gasket selection matters as much as the tank wall, and compatibility is always concentration and temperature specific per the OEM chemical-resistance chart.
At the concentrations on the OEM chart, this tank is listed as compatible with liquids including Acetic Acid (60%, PP/PVC fittings, EPDM gaskets), Aluminum Sulfate (50%, PVC, EPDM), Calcium Chloride (40%, PVC, EPDM), DEF (32.5%, 316SS, EPDM), Ethylene Glycol (100%, PVC, EPDM), Ferric Chloride (50%, PVC, EPDM), Ferric Sulfate (60%, PVC, EPDM), Ferrous Sulfate (20%, PVC, EPDM), Hydrochloric Acid (37%, PVC, Viton), Hydrofluoric Acid (48%, PP/PVC, Viton), Hydrofluosilicic Acid (26%, PP/PVC, Viton), Hydrogen Peroxide (50%, PVC, Viton), Magnesium Chloride (30%, PVC, EPDM), Peracetic Acid (30%, 316SS, Aflas), Phosphoric Acid (85%, PVC, Viton), Polyaluminum Chloride (PVC, EPDM), Potassium Carbonate (50%, PVC, EPDM), Potassium Hydroxide (saturated, PVC, EPDM), Propylene Glycol (PP/316SS, EPDM), Sodium Bisulfate (PVC/PP, EPDM), Sodium Bisulfite (PVC/PP, EPDM), Sodium Carbonate (30%, PVC, EPDM), Sodium Hypochlorite (under 16.5%, PVC, Viton), Sodium Thiosulfate (40%, PVC, EPDM), Sulfuric Acid (98%, CPVC, Viton), Urea Solution (50%, PP/PVC, EPDM), Zinc Orthophosphate (PP/316SS, EPDM), and Ozonated Water (up to 10 PPM, PVC, EPDM). Match every fitting and gasket to your specific chemical and concentration using the concentration- and temperature-specific OEM chart, and start at our full chemical compatibility reference.
The mistake to avoid
The single most common error on a tank like this is reading the 1.9 SG rating as permission to run any dense chemical on the default hardware. Most fittings ship with PVC bodies and EPDM gaskets, but the harshest liquids above break that pattern: Sulfuric Acid at 98% calls for CPVC rather than plain PVC, Peracetic Acid at 30% needs Aflas gaskets rather than Viton, and DEF and urea blends list 316 stainless fitting metal. Confirm both the resin grade and the exact gasket and fitting material before service. One more thing to settle before you order hardware: this listing does not specify the tank's port configuration, so call 866-418-1777 to confirm bulkhead and outlet size and location before you buy any fittings.
This 300 gallon leg tank ships LTL freight from the Enduraplas plant in Neche, ND, quoted live to your ZIP. Get an exact rate with the Freight Cost Estimator, or call 866-418-1777 to talk through frame mounting, fitting layout, and chemical service. If you are spec'ing for an applicator or transfer trailer, our guides on applicator and leg tanks for fertilizer and fertilizer-blend tank stratification walk through the field details.
