The Norwesco 6025 Gallon Black Heavy Duty Horizontal Leg Tank (SKU 44316B) is a haul-rated polyethylene transport tank built for moving large liquid loads over the road on a chassis or trailer. With a 6,025-gallon working capacity, a 1.9 specific gravity rating, and integrated molded legs that cradle the horizontal cylinder, this is one of the heaviest leg tanks in the Norwesco line. The black UV-stable resin handles outdoor staging and field exposure, and the horizontal-leg geometry keeps a low, stable center of gravity for transport. If you are searching for a Norwesco horizontal leg tank to haul fertilizer, water, or compatible chemicals, this is the top of the size range.
Will this tank work for your load?
The tank measures 193 inches long, 99 inches wide, and 106 inches tall, with a 99.0 x 193.0 inch footprint - size your trailer deck and tie-down points to those numbers before you order. Plan for weight at every stage: full of water the tank and contents run about 50,248 lb, and at the 1.9 specific gravity rating the maximum rated contents weight is 95,472 lb. You can verify that rating yourself - 95,472 divided by 50,248 works out to roughly 1.9, which confirms the contents figure is simply the water weight scaled by the SG rating, not a marketing number. That high SG rating is the headline spec here: the shell is engineered to carry dense liquids well above the weight of water, which is what separates a heavy-duty haul tank from a standard water tank. Match your axle ratings, suspension, and tie-down hardware to the loaded figure for the liquid you are actually carrying, not just to the water weight. Use the Tank Sizing Calculator and Tank Sizing Guide to confirm the gallons and loaded weight fit your application. No fitting schedule is published for this SKU, so confirm outlet, manway, and vent locations against the technical drawing on this page, or by phone, before you match the hardware materials listed below.
Chemical compatibility
This tank is a polyethylene shell carrying a 1.9 specific gravity rating. We have not confirmed the exact resin family for this SKU - contact us to verify whether the shell is high-density linear polyethylene (HDLPE) or cross-linked (XLPE) before putting it into chemical service, since that distinction governs which aggressive chemicals it can hold. The chemicals below are concentration- and temperature-specific; always verify your exact concentration and service temperature against our chemical compatibility data before filling. Recommended fitting and gasket materials follow each chemical:
- Acetic Acid (60%) - PP/PVC fittings, EPDM gaskets
- Aluminum Sulfate (50%) - PVC fittings, EPDM gaskets
- Calcium Chloride (40%) - PVC fittings, EPDM gaskets
- DEF (32.5%) - 316SS fittings, EPDM gaskets
- Ethylene Glycol (100%) - PVC fittings, EPDM gaskets
- Ferric Chloride (50%) - PVC fittings, EPDM gaskets
- Ferric Sulfate (60%) - PVC fittings, EPDM gaskets
- Ferrous Sulfate (20%) - PVC fittings, EPDM gaskets
- Hydrochloric Acid (37%) - PVC fittings, Viton gaskets
- Hydrofluoric Acid (48%) - PP/PVC fittings, Viton gaskets
- Hydrofluosilicic Acid (26%) - PP/PVC fittings, Viton gaskets
- Hydrogen Peroxide (50%) - PVC fittings, Viton gaskets
- Magnesium Chloride (30%) - PVC fittings, EPDM gaskets
- Peracetic Acid (30%) - 316SS fittings, Aflas gaskets
- Phosphoric Acid (85%) - PVC fittings, Viton gaskets
- Polyaluminum Chloride - PVC fittings, EPDM gaskets
- Potassium Carbonate (50%) - PVC fittings, EPDM gaskets
- Potassium Hydroxide (Saturated) - PVC fittings, EPDM gaskets
- Propylene Glycol - PP/316SS fittings, EPDM gaskets
- Sodium Bisulfate - PVC/PP fittings, EPDM gaskets
- Sodium Bisulfite - PVC/PP fittings, EPDM gaskets
- Sodium Carbonate (30%) - PVC fittings, EPDM gaskets
- Sodium Hypochlorite (<16.5%) - PVC fittings, Viton gaskets
- Sodium Thiosulfate (40%) - PVC fittings, EPDM gaskets
- Sulfuric Acid (98%) - CPVC fittings, Viton gaskets
- Urea Solution (50%) - PP/PVC fittings, EPDM gaskets
- Zinc Orthophosphate - PP/316SS fittings, EPDM gaskets
- Ozonated Water (up to 10 PPM) - PVC fittings, EPDM gaskets
For the full picture across these chemicals, see our chemical compatibility resource and always confirm your specific concentration and temperature before filling.
The mistake to avoid
The error that costs people money on a tank this size is treating the specific gravity rating as a formality. At 1.9 SG this shell can hold dense fertilizer blends and acids - but several of the chemicals above demand non-standard fitting and gasket materials (316SS, CPVC, Viton, Aflas) rather than the default PVC/EPDM hardware. Specifying the wrong gasket on something like sulfuric acid, sodium hypochlorite, or peracetic acid is how a tank that is otherwise compatible ends up leaking at the fittings. Match the hardware to the chemical, and if you are blending fertilizer, read up on how dense blends stratify in transport - see our guide on fertilizer-blend tank stratification. For DOT classification on applicator and leg tanks, our Norwesco applicator and leg tank guide and 49 CFR 173.5 agricultural exemption breakdown explain when farm-fleet use qualifies.
This tank ships LTL from the nearest Norwesco plant - Lancaster, OH or St. Bonifacius, MN - with freight quoted live to your ZIP. On a tank whose empty shell already moves like freight and whose water fill alone is over 50,000 lb, plant choice is the biggest swing in your cost, so run the nearest of the two before you commit. Get your number with our Freight Cost Estimator, or call 866-418-1777 and we will help you confirm specs, hardware, and the best-shipping plant for your delivery.
