The Norwesco 725 gallon horizontal leg tank is a haul-and-apply workhorse: a saddle-shaped HDLPE tank molded with integrated legs so it sits flat and stable on a skid, trailer deck, or pickup bed without a separate cradle. It carries a 1.9 specific gravity rating, which is why this unit shows up under search terms like norwesco horizontal tank and leg tank when buyers need to move dense liquids, not just water.
Will it handle your load?
Capacity is 725 gallons. Filled with water, the contents weigh about 6,046 lb; at the tank's full 1.9 SG rating the contents can reach roughly 11,488 lb. Those two numbers are the ones that matter when you spec a trailer, a tie-down system, or the axle rating under the tank - size your transport to the heavier figure if you will ever run a dense fluid, not the water weight. At 1.9 SG this is already Norwesco's highest-density horizontal leg rating, so there is no heavier-rated step-up in this style to wait on. Run your fill volume through our Tank Sizing Calculator and read the Tank Sizing Guide if you are deciding between this and a smaller leg tank. For dimensions, fitting locations, and leg spacing, see the technical drawing on this page before you build a deck or order tie-downs.
Chemical compatibility
This tank is high-density polyethylene rated to 1.9 specific gravity, which is the high-density-fluid line - but the catalog flags the resin as HDLPE pending confirmation, so confirm HDLPE versus XLPE (crosslinked) with us before committing it to chemical service; the two resins behave differently and the distinction matters for warranty and chemical resistance. The single most important step on a chemical leg tank is to choose BOTH the fitting and the gasket material from the row that matches your fluid - mixing the wrong elastomer (defaulting to EPDM where the chart calls for Viton or Aflas) is the most common field failure. Compatibility is always concentration- and temperature-specific; verify your exact chemical, concentration, and temperature against the OEM chemical-resistance chart before filling, and note that entries shown without a concentration are listed by the chart for general service - confirm your exact strength with us.
- DEF (diesel exhaust fluid) at 32.5% - note the chart calls for 316SS fittings, not PVC, on DEF (EPDM gaskets)
- Acetic acid at 60% (PP/PVC fittings, EPDM gaskets)
- Aluminum sulfate at 50% (PVC, EPDM)
- Calcium chloride at 40% (PVC, EPDM)
- Ethylene glycol at 100% (PVC, EPDM) and propylene glycol (PP/316SS, EPDM)
- Ferric chloride 50%, ferric sulfate 60%, and ferrous sulfate 20% (PVC, EPDM)
- Hydrochloric acid 37% (PVC, Viton), hydrofluoric acid 48%, and hydrofluosilicic acid 26% (PP/PVC, Viton)
- Hydrogen peroxide 50% (PVC, Viton)
- Magnesium chloride 30% (PVC, EPDM)
- Peracetic acid 30% (316SS, Aflas)
- Phosphoric acid 85% (PVC, Viton)
- Polyaluminum chloride (PVC, EPDM)
- Potassium carbonate 50% and potassium hydroxide saturated (PVC, EPDM)
- Sodium bisulfate and sodium bisulfite (PVC/PP, EPDM)
- Sodium carbonate 30% (PVC, EPDM)
- Sodium hypochlorite below 16.5% (PVC, Viton)
- Sodium thiosulfate 40% (PVC, EPDM)
- Sulfuric acid 98% (CPVC, Viton)
- Urea solution 50% (PP/PVC, EPDM)
- Zinc orthophosphate (PP/316SS, EPDM)
- Ozonated water up to 10 PPM (PVC, EPDM)
See the full chemical compatibility reference for concentration and temperature limits on every fluid above.
Freight and ordering
This tank ships LTL on a pallet, quoted live to your ZIP from whichever of Norwesco's five molding plants is nearest you - Fairfield, TX; Griffin, GA; Lancaster, OH; Shawnee, OK; or Tooele, UT. Sourcing from the closest plant means a shorter LTL lane and a lower freight number on a tank this size, so get a quote for your delivery point with the Freight Cost Estimator. If this tank rides on an applicator skid or non-roadable trailer, read our guide on Norwesco applicator and leg tanks for fertilizer and, for blended liquid fertilizer, tank stratification and mixing protocol. Questions on fit or fluid before you buy? Call 866-418-1777.
