Enduraplas 4500 Gallon Green Horizontal Leg Tank

The Enduraplas 4500 Gallon Green Horizontal Leg Tank is built for hauling on a chassis or skid, with the long, low leg-tank profile that distributes weight across a 95.0 x 179.0 inch footprint. The tank stands 84 inches tall, runs 179 inches long, and carries a full 4,500 gallons. It is molded from green polyethylene and carries a 1.9 specific gravity rating, which is what makes it more than a water tote: it is rated to haul dense liquids, not just rinse water. Buyers searching "Enduraplas," "horizontal tank," or "leg tank" land here because few horizontal tanks this size carry an SG rating this high.

Will it work for your load?

Match your liquid's weight to the tank's two limits. Filled with water, this tank carries 37,530 pounds of contents. Its maximum rated contents weight is 71,307 pounds, which is the ceiling set by the 1.9 specific gravity rating. To use that headroom, multiply your gallons by your liquid's specific gravity and confirm you stay under the rated contents weight, then confirm your trailer, axles, and tie-downs are sized for that load before you fill. The 95 x 179 inch footprint is roughly 118 square feet, so at full rated contents your pad sees on the order of 600 pounds per square foot before the tank and structure are even counted: pour or verify a pad that can carry it. Note also that outlet, bulkhead, and fitting configuration is not specified in our data for this model, so confirm outlet size and material before you plumb anything. If you are not sure what size fits your job, the Tank Sizing Calculator and the Tank Sizing Guide walk through capacity and weight for transport tanks.

Chemical compatibility

This tank is molded from high-density polyethylene resin (shown as HDLPE) and rated at 1.9 specific gravity. Because the resin code carries a question mark in our data, confirm whether your tank is HDLPE or XLPE (cross-linked) before committing it to chemical service, since the two resins resist different chemicals: this is the first thing to nail down, not the last. Fitting and gasket materials below come from the OEM chemical-resistance chart and are concentration and temperature specific, so verify your exact concentration and operating temperature against that chart before you plumb anything. The materials listed are recommendations for the plumbing, not parts that ship installed on this tank.

At the listed concentrations, this resin and SG rating support hauling: 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). Notice that the harsher acids and oxidizers call for Viton or Aflas gaskets and PVC, CPVC, or 316SS fittings rather than the default EPDM and PP, so spec the fittings to the chemical, not to the tank. For the full picture see our chemical compatibility resource and the concentration and temperature notes on each chemical's page.

The mistake to avoid

The expensive error on a leg tank this large is treating the 1.9 SG rating as a license to fill it with anything to the brim. First, confirm the resin: HDLPE versus XLPE decides which chemicals the tank survives, and our data flags it with a question mark, so settle that before anything else. The rating sets a contents-weight ceiling of 71,307 pounds; it does not certify the tank against a specific chemical. Match the fitting and gasket materials to your actual chemical and concentration, and never assume DOT roadability or any food-grade or potable status that is not stated for this model. Review the loaf-style and applicator leg-tank notes in our leg tanks for fertilizer guide and the fertilizer-blend stratification guide before you settle on a fill.

This tank ships LTL freight from the Enduraplas plant in Neche, ND, with the rate quoted live to your ZIP. At up to 71,307 pounds of rated contents and a 95-inch (roughly 7.9-foot) load width, plan on a heavy-haul LTL quote rather than a parcel rate, and confirm any permit or width requirements for your route. Get your number from our Freight Cost Estimator or call 866-418-1777.