The Enduraplas 500 Gallon White Horizontal Sump Bottom Leg Tank is built for haul-and-spray field work where a low, stable profile matters more than vertical height. At 48 inches tall, 57 inches wide, and 80 inches long, this horizontal leg tank sits on an integrated leg base that keeps the load low on a trailer or skid, and its molded sump bottom drains contents toward a low point for fuller evacuation between loads - useful when you switch products and need to clear the heel. It holds 500 gallons in natural white polyethylene.
Will it work for your load?
This tank carries a 1.9 specific gravity rating, which is what makes it a true chemical and fertilizer hauler rather than a water-only vessel. Filled with plain water (SG 1.0), the contents weigh about 4,170 pounds; loaded to its full 1.9 rating, the tank is engineered to carry up to 7,923 pounds of contents. That ceiling is contents only - add the tank's own weight and your mount when sizing trailer axles and lift equipment. The practical takeaway: at 500 gallons, any product up to 1.9 SG fills the tank completely, and most liquid fertilizers, brines, and the chemicals listed below land under that mark. Run anything denser than 1.9 SG and you must underfill. Match your actual product's specific gravity against the rating before you fill - it is the number that governs whether the wall can carry the weight. The 57 x 80 inch footprint tells you the deck space you need to mount it. If you are unsure how a given volume of your product pencils out, run it through our Tank Sizing Calculator or read the Tank Sizing Guide.
Chemical compatibility
This is a polyethylene tank rated to 1.9 specific gravity. The resin is recorded in our data as HDLPE but is not yet confirmed, so confirm HDLPE versus XLPE - and its suitability for your exact product - with us before committing this tank to chemical service. This matters most for the aggressive entries below; for 98% sulfuric acid (CPVC body, Viton gasket), 37% hydrochloric acid, 48% hydrofluoric acid, and hydrofluosilicic acid, verify resin, concentration, and operating temperature with us first. Compatibility below is drawn from the OEM chemical-resistance chart and is concentration- and temperature-specific; always verify against your exact conditions.
Within its 1.9 SG rating, this tank is listed compatible with a broad slate of water-treatment and ag chemicals, including 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). Notice how the fitting and gasket material shifts by chemical - sodium hypochlorite, hydrochloric, and sulfuric acid call for Viton, while DEF and peracetic acid call for stainless. Pick the wrong gasket and the tank wall outlasts a seal that fails in weeks. See the full chemical compatibility reference and confirm your concentration and temperature before ordering.
Freight and ordering
This tank ships without plumbing, so fittings are selected per chemical - find your product's row in the table above for the matching body material (PVC, CPVC, PP, or 316SS) and gasket (EPDM, Viton, or Aflas), then call us to spec it. The tank ships LTL freight from the Enduraplas plant in Neche, North Dakota, quoted live to your ZIP. Use the Freight Cost Estimator to price delivery to your dock, or call 866-418-1777 to lock in fittings, gaskets, and a freight quote together. If you are spec'ing this for fertilizer haul-and-apply or trailer-mounted use, our guides on applicator and leg tanks for fertilizer, portable utility tanks and DOT classification, and fertilizer-blend tank stratification walk through the regulatory and mixing details that catch operators off guard.
