The Norwesco 2635 gallon horizontal elliptical leg tank is a black HDPE transport tank built for hauling heavy liquid by trailer or skid. Buyers searching for a horizontal leg tank or applicator-style hauler land here for one reason: the elliptical cross-section sits low and wide on a 90-inch by 140-inch footprint, with molded support legs that cradle the tank in motion. It is molded from high-density linear polyethylene with a 1.9 specific gravity rating, which is what lets it carry dense chemicals, not just water. Filled with water it holds roughly 21,976 pounds, and the tank is rated for contents up to 41,754 pounds, so that 1.9 SG rating is the real reason you would choose this tank over a water-only black horizontal leg tank.
What this tank does and how to size it
Standing 72 inches tall, 90 inches wide, and 140 inches long, this is a large-capacity hauler. Use the loaded weights above to confirm your trailer or skid frame is rated for the liquid you intend to carry: water tops out near 21,976 pounds, but a denser product can push you toward the 41,754-pound maximum-rated content weight. Run your product's specific gravity through our Tank Sizing Calculator before you commit to an axle and frame package, and the Tank Sizing Guide walks through how SG drives loaded weight. For mounting context on applicator and leg-tank trailer setups, see our guide on Norwesco applicator and leg tanks for fertilizer and the DOT classification notes for farm-fleet portable tanks. Reference the technical drawing on this page for leg spacing and fitting locations before you build the frame. This listing does not specify factory-installed fittings, outlet size, or lid size, so call 866-418-1777 to confirm the bulkhead and outlet configuration before you plan your plumbing or finalize the frame.
Chemical compatibility
This tank is molded from HDLPE and carries a 1.9 specific gravity rating, which qualifies it for a wide range of dense chemical service. Because it is a transport tank, your loaded product weight drives both the 1.9 SG structural margin and your LTL freight class, so run the actual density through the Tank Sizing Calculator and the Freight Cost Estimator together. The fitting and gasket materials below come from the OEM chemical-resistance chart and are concentration- and temperature-specific, so always confirm your exact product, concentration, and service temperature against that chart before plumbing the tank. Compatible chemicals at the listed concentrations include acetic acid (60%) with PP or PVC fittings and EPDM gaskets, aluminum sulfate (50%), calcium chloride (40%), DEF (32.5%) with 316SS fittings and EPDM gaskets, ethylene glycol (100%), ferric chloride (50%), ferric sulfate (60%), ferrous sulfate (20%), hydrochloric acid (37%) with PVC fittings and Viton gaskets, hydrofluoric acid (48%), hydrofluosilicic acid (26%), hydrogen peroxide (50%) with PVC fittings and Viton gaskets, magnesium chloride (30%), peracetic acid (30%) with 316SS fittings and Aflas gaskets, phosphoric acid (85%), polyaluminum chloride, potassium carbonate (50%), potassium hydroxide (saturated), propylene glycol with PP or 316SS fittings, sodium bisulfate, sodium bisulfite, sodium carbonate (30%), sodium hypochlorite (under 16.5%) with PVC fittings and Viton gaskets, sodium thiosulfate (40%), sulfuric acid (98%) with CPVC fittings and Viton gaskets, urea solution (50%), zinc orthophosphate, and ozonated water up to 10 PPM with PVC fittings and EPDM gaskets. Match the fitting and gasket material to your specific chemical, and start at our chemical compatibility hub if you are cross-checking a blend.
The mistake to avoid
The single most common error on a tank like this is using the 1.9 SG rating as a blanket pass for any chemical. The rating tells you the tank wall can structurally carry a dense liquid; it does not certify chemical resistance. Acetic acid, hydrochloric acid, and sodium hypochlorite each demand different fitting and gasket materials, and a Viton-required acid run with EPDM gaskets will fail at the seal long before the wall does. Confirm the OEM chart entry for your exact concentration and temperature, then spec the fittings to match. Also note the tank resin is high-density linear polyethylene; if your application leans toward an aggressive oxidizer or solvent, confirm HDLPE versus XLPE suitability for that product before filling.
This tank ships by LTL freight, quoted live to your ZIP code. Norwesco molds at several plants, and we ship from the location nearest you, with Fairfield, TX and Griffin, GA the closest options for most southern and central destinations. Get an exact freight number with our Freight Cost Estimator, or call us at 866-418-1777 to confirm origin plant, lead time, and the right fitting package for your service. For more on how black pigment affects UV life and chemical-resistance margins, see our HDPE color pigment chemistry guide.
