The Norwesco 235 Gallon Black Elliptical Leg Tank (SKU 44806B) is a 235-gallon transport tank built for moving liquid by trailer or truck bed, where the low, flat-bottomed elliptical body keeps the load sitting low for road stability. It measures 32" high by 40" wide by 66" long with a 40.0 x 66.0 inch footprint, molded in black polyethylene and carrying a 1.5 specific gravity rating. The top is fitted with threads for an 8" cap (see the technical drawing on this page for the fitting layout). This is the Norwesco elliptical leg tank style farmers and ag fleets search for when they need a black tank that hauls.
Will this Norwesco leg tank handle your load?
Sizing comes down to the weight behind it, not just the gallons. Filled with water this tank carries about 1,960 lb of contents, and its 1.5 specific gravity rating allows a maximum of 2,940 lb of contents. Across 235 gallons that works out to a ceiling of roughly 12.5 lb per gallon, versus 8.34 lb per gallon for water. That per-gallon number is the fast check: look up your fluid's weight per gallon and as long as it stays at or under 12.5, the tank is rated for it. Match that ceiling against your axle and trailer ratings before you load. Run the numbers with our Tank Sizing Calculator or read the Tank Sizing Guide if you are deciding between this and a larger leg tank. For DOT classification on farm fleet transport, the guides on Norwesco applicator and leg tanks for fertilizer and portable utility tanks under 49 CFR 173.5 walk through the agricultural exemption and non-roadable trailer scope.
Chemical compatibility
This tank is polyethylene with a 1.5 specific gravity rating. Confirm the molded resin (HDLPE versus XLPE) against the OEM chart before any chemical fill, as the two behave differently against aggressive chemistries. At the 1.5 SG rating, this tank is rated to handle 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 transport are a natural fit here: the tank is rated for DEF at 32.5% and Urea Solution at 50%, but DEF demands 316 stainless fittings because brass and ordinary steel will not survive in that fluid, so buy the right fitting up front. Confirm every selection against the OEM chemical-resistance chart, which is concentration- and temperature-specific, and review the acetic acid, aluminum sulfate, calcium chloride, DEF, ferrous sulfate, magnesium chloride, sodium carbonate, and urea solution pages along with our full chemical compatibility reference.
Chemicals that need a higher-rated tank
Several common chemistries exceed what a 1.5 SG tank should carry and need a 1.9 specific gravity tank instead. If your service involves 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, do not put it in this tank - step up to the 1.9 SG version, and call 866-418-1777 and we will match you to the right higher-rated tank. Note the gasket changes too: hydrochloric acid, hydrofluoric acid, hydrogen peroxide, phosphoric acid, sulfuric acid, and sodium hypochlorite all call for Viton rather than EPDM.
The mistake to avoid
The trap on a leg tank like this is sizing by gallons alone and ignoring the specific gravity math. The 1.5 SG rating is what lets the tank legally hold 2,940 lb of contents; load a denser fluid like sulfuric acid or ferric chloride and you have exceeded the wall design even if the gallons fit. Confirm your fluid's weight per gallon and concentration against the OEM chart, and confirm the HDLPE-versus-XLPE resin before any chemical fill.
This tank ships LTL from the nearest of Norwesco's plants - Hanford, CA; Lancaster, OH; Shawnee, OK; or Sheldon, IA - with freight quoted live to your ZIP. Because the quote auto-selects the closest plant to your delivery point, the same tank can price very differently by region, so run your ZIP through our Freight Cost Estimator for your real number, or call 866-418-1777. If you are blending fertilizer in transport, the guide on fertilizer-blend tank stratification covers the mixing protocol that keeps a load from salting out.
