The Norwesco 525 Gallon Horizontal Leg Tank in white is a polyethylene tank built for mobile and stationary haul duty where the load rides low and stays put. It carries 525 gallons, and the self-supporting leg design lets it sit on a truck bed, trailer, or skid without an external cradle. Norwesco rates this tank to a 1.5 specific gravity, so it handles liquids heavier than water up to that density. Norwesco molds this tank at nine plants nationwide, so your tank typically ships from the closest one — run the Freight Cost Estimator for a live LTL quote to your ZIP. This is the tank growers and applicators search for as a Norwesco horizontal leg tank for water hauling, fertilizer blends, and field transport.
Will it work for your load
Capacity is 525 gallons in polyethylene, with a 1.5 specific gravity rating. Plan your load by weight, not just volume. Filled with plain water this tank carries about 4,378 pounds, and at the full 1.5 SG rating the contents can reach roughly 6,568 pounds. Match that figure against your trailer or truck-bed rating and your axle limits before you fill, and confirm your tie-down points handle a shifting liquid load. Strap over the tank body at the molded tie-down points or leg slots — never over the fittings — and support the full length of the leg flats on a flat deck; spanning the legs across rails point-loads the saddle and is the number-one field failure on horizontal leg tanks. To size the right tank for your gallons-per-trip math, run the Tank Sizing Calculator or read the Tank Sizing Guide. For the specifics of fitting, valve, and outlet locations, see the technical drawing on this page.
Chemical compatibility
This is a polyethylene tank rated to 1.5 specific gravity. Confirm the exact resin grade against the OEM chemical-resistance chart for your chemical before service, since the chart is concentration and temperature specific — always verify your actual concentration and operating temperature against it. At the 1.5 SG rating, the following are compatible:
- Acetic Acid to 60% (PP/PVC fittings, EPDM gaskets)
- Aluminum Sulfate to 50% (PVC fittings, EPDM gaskets)
- Calcium Chloride to 40% (PVC fittings, EPDM gaskets)
- DEF at 32.5% — pair it with 316 stainless fittings and EPDM gaskets, not the PVC default (316SS fittings, EPDM gaskets)
- Ferrous Sulfate to 20% (PVC fittings, EPDM gaskets)
- Magnesium Chloride to 30% (PVC fittings, EPDM gaskets)
- Sodium Carbonate to 30% (PVC fittings, EPDM gaskets)
- Urea Solution to 50% (PP/PVC fittings, EPDM gaskets)
- Ozonated Water up to 10 PPM (PVC fittings, EPDM gaskets)
Hauling DEF at 32.5%? This tank is compatible, but the fitting material matters: run 316 stainless fittings with EPDM gaskets, not the PVC used for most of the chemicals above.
Some heavier liquids need a higher-SG tank than this 1.5-rated unit. If you are storing Ethylene Glycol, Ferric Chloride, Ferric Sulfate, Hydrochloric Acid, Hydrofluoric Acid, Hydrofluosilicic Acid, Hydrogen Peroxide, Peracetic Acid, Phosphoric Acid, Polyaluminum Chloride, Potassium Carbonate, Potassium Hydroxide, Propylene Glycol, Sodium Bisulfate, Sodium Bisulfite, Sodium Hypochlorite, Sodium Thiosulfate, Sulfuric Acid, or Zinc Orthophosphate, step up to a 1.9 specific gravity tank rather than running them here. Call 866-418-1777 and we will match you to the equivalent Norwesco 1.9 SG tank for your chemical, and confirm any selection on the per-chemical pages and the chemical compatibility guide.
The mistake to avoid
The most common error with a 1.5-rated leg tank is loading it by gallons instead of by weight. A full 525 gallons of a 1.5 SG liquid is about 6,568 pounds of moving mass, and on a trailer that weight plus the legs' contact loading can exceed a deck or hitch rating long before the tank is "full." Confirm the exact resin grade before any chemical fill, pick fitting and gasket materials from the compatibility chart above, and keep the tank within its 1.5 SG rating. For ag-trailer transport specifics, the guides on Norwesco applicator and leg tanks for fertilizer and DOT classification for farm-fleet use are worth a read, along with our fertilizer-blend stratification guide.
This tank ships LTL freight from the nearest Norwesco plant to you — among Fairfield, TX; Griffin, GA; Hanford, CA; Lancaster, OH; Owego, NY; Shawnee, OK; St. Bonifacius, MN; Tooele, UT; and Washougal, WA — with freight quoted live to your ZIP. Get your number now with the Freight Cost Estimator, or call us at 866-418-1777 to confirm the right tank, fittings, and routing for your load.
