The Enduraplas 100 Gallon Black Horizontal Sump Bottom Leg Tank ships as a tank-and-frame unit built for mobile applicator and nurse-rig work, where a stable, low-slung profile matters more than vertical storage. The tank holds 100 gallons inside a 28-inch tall by 41-inch wide by 46-inch long body, riding on its own leg frame with a sloped sump bottom that drains toward the outlet so you can pull product down without leaving a heel. The shell is polyethylene molded in black, and Enduraplas rates it to a 1.9 specific gravity, which is what lets this 100 gallon horizontal leg tank carry heavy fertilizer blends, DEF, and dense chemistries rather than water alone.
Will it work for your load
Sizing is the first thing to get right on a leg tank, because a horizontal body on a trailer or skid puts every pound over the axle and the frame. Filled with water this tank carries about 834 lb, and the 1.9 SG rating gives it a maximum rated contents weight of roughly 1,585 lb for denser products. Plan your trailer, hitch, and tongue weight against that 1,585 lb figure, not the water number, if you intend to haul anything heavier than plain water. The 41 x 46-inch footprint and 28-inch height keep the center of gravity low, which is the whole point of a horizontal leg design for a 100 gallon tank that gets moved loaded. At 1.9 SG this is the heaviest-duty option in the poly leg-tank class, so there is no step-up tank to chase for dense blends. Run the numbers with the Tank Sizing Calculator and the Tank Sizing Guide before you commit to a frame layout.
Chemical compatibility
This is a high-strength black polyethylene tank rated to 1.9 specific gravity, which is why it suits heavy fertilizer blends and DEF as well as a long list of process chemicals. The resin is recorded here as HDLPE pending confirmation, so confirm the exact resin grade with us before putting any aggressive chemistry in it, since different polyethylene grades behave differently under sustained chemical contact. Match every product below to the right fitting and gasket material and dose it at the concentration and temperature shown on the OEM chemical-resistance chart, which is always concentration- and temperature-specific. As a quick read on materials: EPDM gaskets cover most of the listed products; the exceptions are the strong acids and sodium hypochlorite (Viton), peracetic acid (Aflas), and DEF and peracetic acid plumbing (316 stainless rather than PVC).
Among the products this tank is listed compatible with: Sulfuric Acid at 98% (CPVC fittings, Viton gaskets), Hydrochloric Acid at 37% (PVC, Viton), Phosphoric Acid at 85% (PVC, Viton), Hydrofluoric Acid at 48% (PP/PVC, Viton), Sodium Hypochlorite below 16.5% (PVC, Viton), Ferric Chloride at 50% (PVC, EPDM), Aluminum Sulfate at 50% (PVC, EPDM), Calcium Chloride at 40% (PVC, EPDM), DEF at 32.5% (316SS, EPDM), Urea Solution at 50% (PP/PVC, EPDM), Ethylene Glycol at 100% (PVC, EPDM), Peracetic Acid at 30% (316SS, Aflas), Hydrogen Peroxide at 50% (PVC, Viton), Potassium Hydroxide saturated (PVC, EPDM), and ozonated water up to 10 PPM (PVC, EPDM), along with acetic acid, hydrofluosilicic acid, ferric sulfate, ferrous sulfate, magnesium chloride, polyaluminum chloride, potassium carbonate, propylene glycol, sodium bisulfate, sodium bisulfite, sodium carbonate, sodium thiosulfate, and zinc orthophosphate. Start at our chemical compatibility reference to confirm your specific product and concentration.
The mistake to avoid
Do not load this tank to its 834 lb water capacity and assume you are safe with a denser product. The 1.9 SG rating means the tank wall can handle the weight, but a heavy fertilizer blend or acid at full volume can push you to the 1,585 lb contents figure and overload a trailer, axle, or frame set up for water weight. Match the fitting and gasket material to the chemical, never reuse a Viton-rated plumbing setup for a product the chart lists as EPDM-only or the reverse, and confirm the resin grade before running anything aggressive. The unit ships as a tank-and-frame assembly as listed; fitting and plumbing materials are not included in the pack here, so confirm your outlet and fitting build by phone. See the technical drawing on this page for the sump geometry and outlet location.
This 100 gallon horizontal leg tank ships LTL freight from the Enduraplas plant in Neche, North Dakota, quoted live to your ZIP. Because it leaves a single origin in the upper Midwest, LTL distance is the main driver of your freight cost, so quote to your ZIP before committing. Get a freight estimate with the Freight Cost Estimator, or call 866-418-1777 to confirm your tank and frame. For build and hauling guidance, see our guides on applicator and leg tanks for fertilizer, portable utility tanks and DOT classification, and fertilizer-blend tank stratification.
