The Enduraplas 250 Gallon Black Horizontal Sump Bottom Leg Tank with Frame is built for one job: hauling heavy liquid on a trailer, in a truck bed, or on a skid. It holds 250 gallons of polyethylene-contained product, rides low on an integrated frame, and drains through a sump bottom so you can empty it clean. The black resin shrugs off UV in open-field service, and the low horizontal stance keeps the load center close to the deck for stability when full and moving. Service class here is haul - this is a mobile tank, not a stationary storage vessel.
Will it work for your job - and is your haul legal?
The footprint runs 47 in wide by 55 in long at 38 in tall, so it drops onto most utility trailers and pickup beds without crowding the rails. Here is the number that governs everything: this tank is rated to 1.9 specific gravity. That means a maximum safe liquid density of about 15.8 lb per gallon, so at 250 gallons the contents ceiling is 3,962 lb. Plain water at the same fill is only about 2,085 lb - the extra 1,877 lb of headroom is exactly what lets you haul dense liquids like fertilizer blends, brine, and many chemicals that would overload a water-only tank. Before you load, run your filled weight against your trailer or truck axle rating with the Tank Sizing Calculator and the Tank Sizing Guide. If this is a farm haul, our guides on applicator and leg tanks for fertilizer and portable utility tanks and the 49 CFR agricultural exemption walk through DOT classification and when a farm fleet movement qualifies for exemption - read them before you assume your run is covered. Buyers searching for an Enduraplas 250 gallon horizontal leg tank land on a black leg-tank geometry paired with a 1.9 SG rating because that is the right combination for heavy mobile service.
Chemical compatibility
This is a polyethylene tank rated to 1.9 specific gravity. Confirm HDLPE versus XLPE with us before putting it into oxidizer or strong-acid service - that distinction governs long-term resistance to the most aggressive products below. Chemical resistance also depends on fitting and gasket material, so match the hardware to your product. The following are compatible at the listed concentrations when paired with the correct fittings and gaskets, per the OEM chemical-resistance chart - always verify it at your specific concentration and temperature:
- 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 (under 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
Browse the full chemical compatibility reference to match your exact product, concentration, and temperature before you commit.
The mistake to avoid
The number that sinks most leg-tank buyers is specific gravity. People size by gallons alone, fill a tank to 250 gallons, and never check that their liquid stays at or under the 1.9 SG rating - then they either overload the trailer axle and DOT weight rating, or run a water-rated tank under a dense chemical it was never built to hold. Confirm your liquid's specific gravity against the 1.9 ceiling and 15.8 lb-per-gallon density, then size your trailer, tie-downs, and axle rating to the loaded weight, not the water weight. If you are hauling fertilizer blends, our guide on fertilizer-blend stratification covers the density-driven layering that catches a stratified tank before the spreader runs off-spec. One more thing to confirm up front: outlet, bung, and sump-drain size are not specified in our listing - call 866-418-1777 to lock down the fitting configuration before you buy your plumbing. See the technical drawing on this page for frame and overall dimensions.
This tank ships LTL freight from a single Enduraplas plant in Neche, ND. Because it leaves from one far-north origin, freight to southern and coastal ZIPs is worth pricing before you commit - pull your number from the Freight Cost Estimator or call 866-418-1777 and we will quote it live to your ZIP.
