The Norwesco 525 Gallon HDPE Horizontal Leg Tank is a self-supporting horizontal haul tank built for nurse-rig, applicator, and field-transport work where the load shifts and sloshes while you drive. Molded from polyethylene with integral support legs, it carries a 1.9 specific gravity rating - the maximum-density rating offered in this Norwesco horizontal leg tank line - which lets it haul dense agricultural and industrial liquids. If you searched for a Norwesco horizontal leg tank in HDPE, this is the 525-gallon size in that family.
Will it work for your load?
Capacity is 525 gallons. Full of water, the contents weigh 4,378 lb; at the tank's maximum 1.9 SG rating, rated contents reach 8,319 lb. Use those two numbers to size your trailer, axles, and tie-downs before you fill it - a tank that is fine half-full of water can overload a frame when run full of a heavy product. Run the figures through our Tank Sizing Calculator, and if you are comparing this against other sizes in the line, the Tank Sizing Guide walks through matching capacity to load. The horizontal leg design keeps the center of gravity low, which is what you want for a tank that rides on a transport frame rather than sitting stationary. For dimensional layout and leg spacing, see the technical drawing on this page.
Hauling DEF and other field liquids
DEF (diesel exhaust fluid) at 32.5% is rated compatible with this tank, and it is a common haul application for a leg tank of this size - but DEF requires 316SS fittings, not PVC, to keep the fluid within spec. That fitting requirement is the detail most buyers miss when they plumb a transport tank for DEF. Match your hardware to the fluid, not to the tank.
Chemical compatibility
This tank is polyethylene with a 1.9 SG rating. The resin needs to be confirmed as HDLPE versus XLPE before chemical service - that distinction matters for long-term chemical resistance, so confirm construction with us before you commit. Compatibility below is per our chemical-compatibility data and is concentration- and temperature-specific; verify your exact concentration and operating temperature against the OEM chemical-resistance chart before use.
Chemicals rated compatible with this tank at the 1.9 SG class include Acetic Acid (60%), Aluminum Sulfate (50%), Calcium Chloride (40%), DEF (32.5%), Ethylene Glycol (100%), Ferric Chloride (50%), Ferric Sulfate (60%), Ferrous Sulfate (20%), Hydrochloric Acid (37%), Hydrofluoric Acid (48%), Hydrofluosilicic Acid (26%), Hydrogen Peroxide (50%), Magnesium Chloride (30%), Peracetic Acid (30%), Phosphoric Acid (85%), Polyaluminum Chloride, Potassium Carbonate (50%), Potassium Hydroxide (saturated), Propylene Glycol, Sodium Bisulfate, Sodium Bisulfite, Sodium Carbonate (30%), Sodium Hypochlorite (<16.5%), Sodium Thiosulfate (40%), Sulfuric Acid (98%), Urea Solution (50%), Zinc Orthophosphate, and Ozonated Water (up to 10 PPM, PVC fitting / EPDM gasket). Fitting and gasket materials are not interchangeable across these - DEF and Peracetic Acid call for 316SS fittings, Sulfuric Acid needs CPVC, and aggressive acids such as Hydrochloric, Hydrofluoric, Phosphoric, Hydrogen Peroxide, and Sodium Hypochlorite require Viton gaskets rather than the EPDM used on the milder salts and glycols. Match fittings and gaskets to your specific chemical, and cross-check the concentration- and temperature-specific OEM chart at our chemical compatibility tool.
The mistake to avoid
The common error on a 1.9-rated tank is treating the SG rating as headroom for fittings and gaskets too. The tank wall may handle your product, but an EPDM gasket on a tank plumbed for Sulfuric Acid will fail - the gasket and fitting material must be selected per chemical, not per tank. The second trap is loading to 8,319 lb on a frame rated for water weight; size your transport hardware to the actual product density, not to water.
This tank ships LTL freight, quoted live to your ZIP from the nearest Norwesco plant - Fairfield, TX; Hanford, CA; Lancaster, OH; Owego, NY; Shawnee, OK; St. Bonifacius, MN; Tooele, UT; or Washougal, WA. Get a real number with our Freight Cost Estimator or call 866-418-1777 to confirm specs and freight before you order. For application background, see our guides on Norwesco applicator and leg tanks for fertilizer and fertilizer-blend tank stratification.
