The Norwesco 125 Gallon Black Horizontal Leg Tank (SKU 40955) is a 125-gallon polyethylene horizontal leg tank built for mobile fertilizer, ag, and utility hauling where the load needs to ride low and stay strapped down. Molded legs give it a stable 32.0 x 41.0 inch footprint, and the black resin shields contents from UV and light. It measures 41 in long, 32 in wide, and 35 in tall, and carries a 1.5 specific gravity rating, so it is engineered to haul liquids up to one and a half times the weight of water. This is the kind of horizontal leg tank people search out for ag and applicator work, and it earns that reputation by riding low and holding position with product in it.
Will it work for your load?
A horizontal leg tank is meant to be strapped onto a trailer, skid, or truck bed and moved while full. A full 125 gallons of water weighs about 1,042 lb; the tank is rated to carry contents up to 1,564 lb at maximum. That maximum is the 1.5 SG ceiling at a full tank: 1,564 lb across 125 gallons works out to roughly 12.5 lb per gallon, so a heavy 1.4-1.5 SG fertilizer blend hits the gallon load and the wall rating at the same point. There is no headroom to top off a full tank with a dense product. Size your trailer, frame, and tie-downs to that 1,564 lb figure, and check the technical drawing on this page for fitting locations and dimensional detail before you build a mount or plumb a manifold. If you are unsure whether 125 gallons fits your run length and application rate, run the numbers through our Tank Sizing Calculator and the Tank Sizing Guide.
Chemical compatibility
This is Norwesco polyethylene rated to a 1.5 specific gravity, so it covers a solid range of ag and treatment liquids at that density. Per our chemical compatibility data (always concentration- and temperature-specific), it handles DEF at 32.5% and Urea Solution at 50% - both squarely on target for the applicator buyer - plus Acetic Acid at 60% (PP/PVC fittings, EPDM gaskets), Aluminum Sulfate at 50% (PVC, EPDM), Calcium Chloride at 40% (PVC, EPDM), Ferrous Sulfate at 20% (PVC, EPDM), Magnesium Chloride at 30% (PVC, EPDM), Sodium Carbonate at 30% (PVC, EPDM), and Ozonated Water up to 10 PPM (PVC, EPDM). One gotcha to flag: DEF requires 316SS fittings, not the PVC that works for most of the others, and Urea needs PP/PVC - do not plumb either with plain PVC hardware. Match the fitting and gasket material to the specific chemical, because a wrong gasket is the most common field failure on a chemical tank. Cross-check every service against the OEM chemical-resistance chart at your concentration and temperature.
Hauling something denser? You need the 1.9 SG tank
Running sodium hypochlorite (bleach), sulfuric acid, ethylene glycol, or any of the chemicals below? Those exceed what a 1.5 SG tank should hold and require a 1.9 specific gravity tank instead - and several also jump the gasket from EPDM to Viton or Aflas, so you are changing the wall and the seal material together. Do not run these in this tank: Ethylene Glycol, Ferric Chloride, Ferric Sulfate, Hydrochloric Acid (Viton), 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. If your service liquid is on this list, call us about the 1.9 SG version. Full details on every chemical above live on our chemical compatibility resource.
This tank ships LTL freight from the nearest of Norwesco's plants - Fairfield TX, Griffin GA, Hanford CA, Owego NY, Shawnee OK, Sheldon IA, St. Bonifacius MN, Tooele UT, Washington Court House OH, or Washougal WA - and freight is quoted live to your ZIP. Get a number in seconds with our Freight Cost Estimator, or call us at 866-418-1777. For mounting and DOT-classification context on Norwesco leg and applicator tanks, see our guide on Norwesco applicator and leg tanks for fertilizer, the 49 CFR 173.5 ag exemption breakdown, and our deep dive on fertilizer-blend tank stratification.
