The Enduraplas 3500 Gallon Green Horizontal Leg Tank is a 3,500-gallon polyethylene horizontal leg tank built for transport: the leg-cradle base lets it sit flat and strap down on a skid, trailer, or truck bed for moving water and ag chemicals across the field or down the road. It measures 179 inches long by 95 inches wide by 70 inches high (a 95.0 x 179.0-inch footprint), so check that 70-inch height against your low-clearance trailer deck, shop door, and gooseneck rails before you commit. It carries a 1.9 specific gravity rating, which is the spec that decides what you can legally put in it.
Will it work for your job?
Filled with water, this tank holds 29,190 pounds of contents at full capacity, so plan your trailer rating, axle count, and strapping around that number for water. But water only uses about 53% of what this shell is rated to carry: at its 1.9 SG rating the tank is rated to carry up to 55,461 pounds of contents. That gap is your density headroom for liquid fertilizer blends and other heavy ag chemicals - size the trailer to the actual chemical you are hauling, not to water. Use the Tank Sizing Calculator and the Tank Sizing Guide to confirm the loaded weight against your equipment, since a 3,500-gallon horizontal tank is squarely in DOT-trailer territory once it is full.
Chemical compatibility
This is a polyethylene tank with a 1.9 specific gravity rating, which is the high-SG option - it is exactly the shell that lets you run the most aggressive listed service, Sulfuric Acid at 98% (CPVC fittings, Viton gaskets), where a lighter 1.5 SG tank would not be rated. The resin is identified as HDLPE in our data but carries a question mark, so confirm with us whether this shell is HDLPE or XLPE before you commit it to any chemical service - that distinction changes long-term resistance. Compatibility below is drawn from the OEM chemical-resistance chart and is concentration- and temperature-specific; verify your exact concentration, temperature, and duty cycle against that chart before filling. Fitting and gasket materials are called out per chemical because the tank shell is only part of the system.
Chemicals this tank can handle at the listed concentrations include Acetic Acid (60%, PP/PVC fittings, EPDM gaskets), Aluminum Sulfate (50%, PVC, EPDM), Calcium Chloride (40%, PVC, EPDM), DEF (32.5%, 316SS fittings, 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), Potassium Carbonate (50%, PVC, EPDM), Potassium Hydroxide (saturated, PVC, EPDM), Sodium Carbonate (30%, PVC, EPDM), Sodium Hypochlorite (under 16.5%, PVC, Viton), Sodium Thiosulfate (40%, PVC, EPDM), and Urea Solution (50%, PP/PVC, EPDM). A handful of compatible chemicals are listed without a discrete concentration in our data - Polyaluminum Chloride (PVC, EPDM), Propylene Glycol (PP/316SS, EPDM), Sodium Bisulfate (PVC/PP, EPDM), Sodium Bisulfite (PVC/PP, EPDM), Zinc Orthophosphate (PP/316SS, EPDM), and Ozonated Water (up to 10 PPM, PVC, EPDM) - so confirm your exact rating point with us before filling for those.
One detail decides whether the system leaks: gasket material. Most of these chemicals run EPDM, but do not default-order EPDM hardware for the aggressive ones. Run Viton gaskets for Hydrochloric, Hydrofluoric, Hydrofluosilicic, Hydrogen Peroxide, Phosphoric, Sodium Hypochlorite, and Sulfuric; Aflas for Peracetic Acid; and 316SS fittings for DEF, Peracetic Acid, Propylene Glycol, and Zinc Orthophosphate. Match the fitting and gasket material to your chemical exactly, and see the full chemical compatibility reference for the rest of the chart.
The mistake to avoid
The biggest error on a tank like this is loading a dense chemical without checking the math against the 1.9 SG rating, then hauling it on a trailer that is not rated for the weight - at full chemical load this tank can carry up to 55,461 pounds of contents, nearly double its water fill. The second is putting it into chemical service before confirming the resin, since the data lists HDLPE with a question mark and HDLPE versus XLPE changes what it can hold long term. Review the dimensions and fitting layout on the technical drawing on this page, and if you are hauling fertilizer blends read up on applicator and leg tanks for fertilizer, DOT classification for farm-fleet use, and fertilizer-blend tank stratification.
This Enduraplas horizontal leg tank ships LTL freight from the plant in Neche, ND, quoted live to your ZIP. Get your number in seconds with the Freight Cost Estimator, or call 866-418-1777 to talk through your haul setup, fittings, and chemical service before you order.
