The Norwesco 535 Gallon Black Elliptical Leg Tank (SKU 42353B) is a polyethylene haul tank built to move liquid down the road and around the field on its own molded-in legs. It holds 535 gallons, stands 39 inches tall, and lays out a 57 x 80 inch footprint - a low, stable elliptical cross-section that keeps the load close to the trailer or skid deck so it rides better when you transport a partial fill. The black resin suits outdoor and field use, and the tank carries a 1.5 specific gravity rating, meaning it is engineered to safely carry liquids up to 1.5 times the weight of water.
Will it work for your job
Start with weight, because that is what trips people up on a leg tank. Filled with water this tank carries about 4,462 pounds of contents; at its full 1.5 SG rating it is built to hold up to 6,693 pounds. That is a ~2,231 pound swing between a water load and a full dense load, so size your rig for the densest liquid you will actually carry, not just water - re-check trailer rating, tire load range, and tongue and axle distribution before you fill. The 57 x 80 inch footprint and 39 inch height tell you the deck space and clearance you need. Run your numbers through the Tank Sizing Calculator and the Tank Sizing Guide to match capacity to your load and route. The molded-in legs let the tank sit flat without a full cradle, which is why this style is a workhorse for field transport, nurse-tank duty, and applicator support - see the technical drawing on this page for the leg geometry and port layout. If you are spec'ing fertilizer transport or trailer scope, our guides on Norwesco applicator and leg tanks for fertilizer and loaf-style portable utility tank DOT classification walk through the rules.
Chemical compatibility
Confirm your resin first: this tank is molded in HDLPE per our data, but the code is marked uncertain, so verify HDLPE versus XLPE before any chemical service - the two resins behave differently with aggressive chemistries and that single check is the most important step here. Within the 1.5 SG rating, this tank suits a range of agricultural and water-treatment liquids when you match the fitting and gasket materials to the chemical. The fitting and gasket materials listed below are the wetted-material spec you must match when you plumb the tank; port size and supplied fittings are confirmed at order, so check the technical drawing for the port layout. From the manufacturer chemical-resistance chart - which is always concentration and temperature specific - the following are compatible with a 1.5 SG tank: Acetic Acid at 60% (PP/PVC fittings, EPDM gaskets), Aluminum Sulfate at 50% (PVC, EPDM), Calcium Chloride at 40% (PVC, EPDM), DEF at 32.5% (316SS fittings, EPDM gaskets), Ferrous Sulfate at 20% (PVC, EPDM), Magnesium Chloride at 30% (PVC, EPDM), Sodium Carbonate at 30% (PVC, EPDM), Urea Solution at 50% (PP/PVC, EPDM), and Ozonated Water up to 10 PPM (PVC, EPDM). DEF and urea make this leg tank a practical fit for diesel-exhaust-fluid and liquid-fertilizer transport - just confirm exact concentration against the chart.
Chemicals that need a heavier tank
The most common mistake on a leg tank is matching specific gravity to the liquid weight but missing the chemical-resistance rating. Several denser or more aggressive chemicals require a 1.9 SG tank, not this 1.5 SG model - do not put them in this tank. Those include Ethylene Glycol, Ferric Chloride, Ferric Sulfate, Hydrochloric Acid (Viton gaskets), Hydrofluoric Acid (Viton), Hydrofluosilicic Acid (Viton), Hydrogen Peroxide (Viton), Peracetic Acid (316SS, Aflas), Phosphoric Acid (Viton), Polyaluminum Chloride, Potassium Carbonate, Potassium Hydroxide, Propylene Glycol, Sodium Bisulfate, Sodium Bisulfite, Sodium Hypochlorite (Viton), Sodium Thiosulfate, Sulfuric Acid (CPVC, Viton), and Zinc Orthophosphate. Notice the gasket escalation - EPDM handles the salts and glycols, while the aggressive acids and oxidizers step up to Viton or Aflas. If your chemistry is on this list, move to a 1.9 SG tank; our chemical compatibility hub links every chemical to its required tank and wetted materials so you can spec the right one. When you blend fertilizers, read our guide on fertilizer-blend tank stratification so a layered load does not run the spreader off-spec.
Norwesco molds this leg tank at three plants spanning the West, Midwest, and South Central - Hanford, CA; Lancaster, OH; and Shawnee, OK - so most buyers ship LTL from a plant within one freight zone, quoted live to your ZIP. Get an exact freight number with the Freight Cost Estimator or call us at 866-418-1777, and we will route it from the closest plant to hold the cost down.
