The Norwesco 1325 Gallon Black Horizontal Leg Tank is a polyethylene horizontal leg tank built for hauling fertilizer, water, and approved liquids on a non-roadable trailer or skid. At 99 inches long, 66 inches wide, and 70 inches tall, it carries 1,325 gallons in a black, UV-stabilized shell rated to 1.5 specific gravity, so it handles liquids up to 1.5 times the weight of water. The molded legs cradle the cylinder for low, stable transport, and the black resin blocks light to slow algae growth in water and ag service.
Will it work for your load?
Run the numbers before you fill it. Full of water this tank weighs about 11,050 lb, and at its 1.5 SG rating it can hold up to roughly 16,576 lb of contents. That weight rides on a 66.0 x 99.0 inch footprint, so confirm your trailer deck, axles, and tie-down points are rated for a loaded leg tank of this size before the first haul. To match gallons to your trailer and payload, use the Tank Sizing Calculator and the Tank Sizing Guide. Fitting sizes and locations are not listed in our specs for this SKU - read them off the technical drawing on this page or call us to confirm before you plumb it. For non-roadable trailer scope, see our guides on Norwesco applicator and leg tanks for fertilizer and the 49 CFR 173.5 agricultural exemption and DOT classification for farm fleet use.
Chemical compatibility
This is a polyethylene tank rated to 1.5 specific gravity. The resin is recorded as HDLPE in our data but is not yet confirmed - confirm whether your tank is HDLPE or XLPE with us before putting any chemical into service, because the answer changes which liquids and concentrations are safe. All compatibility below is keyed to the OEM chemical-resistance chart, which is concentration- and temperature-specific; verify your exact concentration and operating temperature against it.
At the 1.5 SG rating, this tank is suited to these chemicals at the listed concentrations: 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) - call to confirm service on ozonated water. For ag fleets hauling blended fertilizer, read the guide on fertilizer-blend tank stratification and mixing protocol to keep your load on spec.
Some chemicals exceed what a 1.5 SG tank should carry and require a higher 1.9 SG tank instead - note the fitting and gasket materials shift toward Viton, Aflas, and CPVC at this level: Ethylene Glycol (PVC, EPDM), Ferric Chloride (PVC, EPDM), Ferric Sulfate (PVC, EPDM), Hydrochloric Acid (PVC, Viton), Hydrofluoric Acid (PP/PVC, Viton), Hydrofluosilicic Acid (PP/PVC, Viton), Hydrogen Peroxide (PVC, Viton), Peracetic Acid (316SS, Aflas), Phosphoric Acid (PVC, Viton), Polyaluminum Chloride (PVC, EPDM), Potassium Carbonate (PVC, EPDM), Potassium Hydroxide (PVC, EPDM), Propylene Glycol (PP/316SS, EPDM), Sodium Bisulfate (PVC/PP, EPDM), Sodium Bisulfite (PVC/PP, EPDM), Sodium Hypochlorite (PVC, Viton), Sodium Thiosulfate (PVC, EPDM), Sulfuric Acid (CPVC, Viton), and Zinc Orthophosphate (PP/316SS, EPDM). Do not run these in this tank - step up to a 1.9 SG-rated tank, and use the master chemical compatibility reference to scope the right one.
The mistake to avoid
The costly error on a leg tank this size is matching the SG rating to the wrong liquid. Water is fine, but a denser fertilizer or chemical can push past the 1.5 rating and the loaded weight past your trailer's limits - both at once. Verify your liquid's specific gravity and exact concentration against the OEM resistance chart, confirm the resin question above, and match the fitting and gasket materials listed for your chemical before you fill.
Freight
This tank ships LTL freight from the Norwesco plant in Washington Court House, OH, quoted live to your ZIP - we never bundle freight into the list price. Get your exact cost with the Freight Cost Estimator, or call 866-418-1777 and we will quote it for you. Searching for a Norwesco black horizontal leg tank for fertilizer or water hauling? This is the 1,325-gallon size, and our team can confirm fit, freight, and chemical service before you order.
