The Snyder Industries 300 Gallon Plastic Horizontal Leg Tank (SKU SII-1320000N45) is a 300-gallon horizontal leg tank molded from white polyethylene, built for transport-style hauling where the tank rides on a trailer or skid and gets emptied between fills. It measures 72 inches long by 38 inches wide by 43 inches high, giving you a 38.0 x 72.0 inch footprint that drops into most utility-bed and applicator-trailer layouts. The molded legs let it sit flat without a separate cradle, which is why buyers searching for a horizontal leg tank or a 300 gallon horizontal tank land here.
Will it work for your load?
Filled with water this tank carries roughly 2,502 pounds. It is rated to a 1.9 specific gravity, so the maximum rated contents weight is about 4,754 pounds - that is the hard ceiling. Across 300 gallons that works out to about 15.8 pounds per gallon, meaning a liquid up to 1.9 density fills the wall to its rated limit. Do not exceed roughly 4,754 pounds of contents no matter how much volume is left in the tank; that number, not the 300-gallon mark, is the real towing and axle constraint. The 1.9 rating is the headline spec here: this tank is engineered for dense liquids, not just water, which is what separates it from a lighter water-only leg tank. Before you load, check your filled weight against your trailer or truck capacity using the Tank Sizing Calculator and the Tank Sizing Guide so axle and tongue weight stay legal. Outlet and fitting sizes and locations are not listed in our spec data for this tank - confirm them by phone at 866-418-1777 or from the technical drawing on this page before you plumb it.
Chemical compatibility
The resin is recorded as HDLPE in our data but unconfirmed (it carries a question mark), so verify HDLPE versus crosslinked polyethylene (XLPE) with us before committing this tank to any chemical service - stress-crack behavior under aggressive liquids differs between the two, and that decision comes first. The tank itself is polyethylene with a 1.9 specific gravity rating, which governs the weight of liquid the wall can hold; chemical resistance is a separate question, answered only by the OEM chemical-resistance chart and the wetted fitting and gasket materials. The wall and the plumbing fail on different chemicals, so match both to your exact liquid.
Confirmed compatible chemicals from the OEM chemical-resistance chart, which is concentration- and temperature-specific, include: Acetic Acid (60%, PP/PVC fittings, EPDM gaskets), Aluminum Sulfate (50%, PVC, EPDM), Calcium Chloride (40%, PVC, EPDM), DEF (32.5%, 316SS fittings, EPDM), Ethylene Glycol (100%, PVC, EPDM), Ferric Chloride (50%, PVC, EPDM), Ferric Sulfate (60%, PVC, EPDM), Ferrous Sulfate (20%, PVC, EPDM), Hydrochloric Acid (37%, PVC, Viton), Hydrofluoric Acid (48%, PP/PVC, Viton), 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%, PVC, EPDM), Potassium Hydroxide (saturated, PVC, EPDM), Propylene Glycol (PP/316SS, EPDM), Sodium Bisulfate (PVC/PP, EPDM), Sodium Bisulfite (PVC/PP, EPDM), Sodium Carbonate (30%, PVC, EPDM), Sodium Hypochlorite (under 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), and Ozonated Water (up to 10 PPM, PVC, EPDM - chart-listed only, no dedicated page yet). Watch how the wetted metal and gasket shift: DEF and peracetic acid call for 316 stainless, peracetic acid needs an Aflas gasket, and the harsh acids move you to Viton gaskets and CPVC fittings. Where a concentration is not specified above - Polyaluminum Chloride, Propylene Glycol, Sodium Bisulfate, Sodium Bisulfite, and Zinc Orthophosphate - confirm your exact concentration against the chart before relying on the listing, because compatibility is concentration-specific. Match the fitting and gasket to your precise chemical and concentration, and review the full chemical compatibility resource before ordering.
Avoid the common mistake
The error on a 1.9-SG tank is assuming the high rating means the tank handles any chemical at any concentration. It does not. The 1.9 SG rating covers only the weight the wall can hold; chemical resistance is a separate question answered by the resistance chart and the wetted fitting and gasket material. Run sodium hypochlorite over the wrong gasket and you get a leak long before the polyethylene cares about the load. Lock in the resin type, the chemical, and the concentration first - in that order.
This tank ships LTL freight from the nearest Snyder plant - Lincoln, NE or Philippi, WV - with the cost quoted live to your ZIP. Get your exact number with the Freight Cost Estimator, or call 866-418-1777 and we will help you size the tank, the fittings, and the freight in one call. For application-specific guidance, see our guide on applicator and leg tanks for fertilizer, the fertilizer-blend tank stratification field guide, and the Snyder Captor double-wall SPCC walkthrough if your liquid falls under 40 CFR 112.
