The Enduraplas 1000 Gallon Black Horizontal Sump Bottom Leg Tank (SKU THD01000B) is a polyethylene transport and applicator tank built for moving liquid loads instead of parking them. At 94 inches long, 60 inches wide, and 70 inches tall, it carries 1,000 gallons inside a horizontal leg-tank body whose molded legs sit the tank flat on a trailer or skid, and the sump bottom pulls product toward the outlet so the tank drains down instead of leaving a heel. The black polyethylene wall blocks UV and light, which keeps algae out of water and slows light-driven breakdown of stored product. If you have been searching for a 1000 gallon horizontal leg tank from Enduraplas, this is the haul-and-dispense body that fits the bill.
Will it work for your load?
This is a horizontal leg tank, not a standing vertical, so think about it as a haul-and-dispense vessel. Water alone fills it to 8,340 pounds of full water weight, and the tank is rated to a maximum contents weight of 15,846 pounds at its 1.9 specific gravity rating. That 1.9 SG number is the headline spec here: it tells you how heavy a liquid this wall and structure are engineered to carry, so a 1,000-gallon load of a dense fertilizer blend or a heavy acid weighs far more than the same volume of water. The 1.9 rating is also the top SG rating offered in this tank body, so there is no heavier-duty version to step up to — this is the ceiling for a 1,000-gallon haul tank in this line. Use the Tank Sizing Calculator and the Tank Sizing Guide to match your liquid's weight to the trailer, axles, and tie-downs before you load. The 60.0 x 94.0 inch footprint is what you need to confirm against your deck or cradle.
Chemical compatibility
This tank's wall is high-density linear polyethylene (HDLPE) with a 1.9 specific gravity rating, which is the upper-tier rating that opens up heavy and aggressive liquids. One caution before you commit to chemical service: the resin reads as HDLPE on our data with an open flag, so confirm HDLPE versus XLPE (crosslinked) construction with us before storing an aggressive chemical, since the two resins behave differently with certain media. The molded sump bottom earns its keep here — for aggressive media like sodium hypochlorite or ferric chloride, full drain-down between loads keeps a residual heel from concentrating and attacking the wall and fittings over time. Always size fittings and gaskets to the chemical, not just the tank. Per the Enduraplas chemical-resistance chart, which is concentration- and temperature-specific, this tank is compatible with the following at the listed concentrations:
- 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 (rated to 10 PPM; no dedicated compatibility page yet, so confirm with us before service)
A handful of these — Polyaluminum Chloride, Propylene Glycol, Sodium Bisulfate, Sodium Bisulfite, and Zinc Orthophosphate — are listed without a rated concentration, so confirm your working strength against the OEM chart before you commit. Match every fitting and gasket to your specific chemical and concentration above, then verify against the OEM chart for your temperature. For the full list and dilution notes, see our chemical compatibility reference.
The mistake to avoid
The most expensive error on a 1.9 SG horizontal leg tank is loading it on volume, not weight. Operators see "1,000 gallon" and fill it, then discover a dense blend has pushed the load near the 15,846-pound rated contents ceiling and overloaded the trailer axles long before the tank looks full. Confirm your liquid's specific gravity, run the weight through the sizing calculator, and verify the 60 x 94 inch footprint matches your cradle. If you are spec'ing this as a fertilizer or applicator tank for road or field use, our guides on applicator and leg tanks for fertilizer, portable utility tank DOT classification, and fertilizer-blend stratification walk through the DOT and mixing realities.
This Enduraplas 1000 gallon horizontal leg tank ships LTL freight from the Enduraplas plant in Neche, ND, quoted live to your ZIP. Because it leaves a single northern-plains origin, freight scales with distance south, so run the numbers early with the Freight Cost Estimator or call 866-418-1777 to lock in your tank, fittings, and delivery.
