The Norwesco 135 Gallon Black Elliptical Leg Tank (SKU 45865) is a 135-gallon polyethylene applicator tank built for mounting on a sprayer skid, trailer, or truck bed where a stable, low center of gravity matters. The elliptical cross-section and integrated leg design keep the load wide and low: the footprint runs 36.0 x 56.0 inches, the tank stands 26 inches tall, and the molded legs seat it flat on a deck without a separate cradle. The black polyethylene shell is built for field service, and the 1.5 specific-gravity rating tells you exactly how heavy a liquid this shell is engineered to carry.
Will it do the job
This is a leg tank sized for liquid fertilizer and ag chemical hauling, and the weight math is the part most buyers skip. Filled with water, the tank carries 1,126 lb. At its maximum rated contents weight it is built for 1,689 lb, which is the load you get when you run a 1.5 SG liquid up to the rating. Size your mount, axle, and tie-downs to the 1,689 lb figure, not the water number, so the trailer or skid is rated for the heaviest legal load. Use the Tank Sizing Calculator and Tank Sizing Guide to confirm your liquid's weight against this tank's rating before you spec the hardware. Outlet and fitting sizes are not published in this listing; check the technical drawing on this page and confirm with us at 866-418-1777 before you plumb your sprayer. For the regulatory side of running a fertilizer leg tank on a trailer, read Norwesco Applicator and Leg Tanks for Fertilizer and the 49 CFR 173.5 agricultural-exemption breakdown.
Chemical compatibility
This tank is rated to 1.5 specific gravity. The resin record lists HDLPE but ends with a question mark, so confirm HDLPE versus XLPE with us before you put it into chemical service rather than water or fertilizer. The chemicals below are compatible with a 1.5 SG polyethylene tank at the concentrations shown; always verify against the OEM chemical-resistance chart for your exact concentration and operating temperature, since both shift the answer.
- Acetic Acid at 60% - PP/PVC fittings, EPDM gaskets
- Aluminum Sulfate at 50% - PVC fittings, EPDM gaskets
- Calcium Chloride at 40% - PVC fittings, EPDM gaskets
- DEF (diesel exhaust fluid) at 32.5% - 316 stainless fittings, EPDM gaskets. DEF is the only chemical on this compatible list that requires stainless hardware; PVC or PP will not do.
- Ferrous Sulfate at 20% - PVC fittings, EPDM gaskets
- Magnesium Chloride at 30% - PVC fittings, EPDM gaskets
- Sodium Carbonate at 30% - PVC fittings, EPDM gaskets
- Urea Solution at 50% - PP/PVC fittings, EPDM gaskets
- Ozonated Water up to 10 PPM - PVC fittings, EPDM gaskets
The single most common mistake on a leg tank is matching the chemical to the resin but ignoring the SG rating. A liquid at 1.9 SG fills this 135-gallon volume to roughly 2,140 lb, which is well past the 1,689 lb this shell is rated for. That is why the following liquids, all chemically fine in polyethylene, require a higher 1.9 SG tank rather than this 1.5 SG shell: 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, and Zinc Orthophosphate. Hardware on that list is not all the same: Hydrochloric, Hydrofluoric, Hydrofluosilicic, Hydrogen Peroxide, Phosphoric, Sodium Hypochlorite, and Sulfuric Acid need Viton gaskets rather than EPDM; Peracetic Acid needs Aflas; and Sulfuric Acid specifically needs CPVC fittings, not PVC. If your application is on that list, ask us about the 1.9 SG version before ordering, and see the full chemical compatibility reference.
Freight and ordering
Norwesco molds this elliptical leg tank at multiple plants, and it ships LTL freight from the location nearest you: Hanford, CA; Shawnee, OK; Sheldon, IA; or Washington Court House, OH. Freight is quoted live to your ZIP, so use the Freight Cost Estimator for a freight estimate before you buy. For help matching this Norwesco black leg tank to your sprayer, trailer, or fertilizer-blend program, or to confirm resin and SG rating for your liquid, call us at 866-418-1777. If you blend nutrients in the field, the guide on fertilizer-blend tank stratification covers how to keep a mix from salting out before it reaches the spreader.
