The Enduraplas 500 Gallon Yellow Horizontal Sump Bottom Leg Tank is a Neche, North Dakota-built polyethylene haul tank carried full-width on integral legs, rated to a 1.9 specific gravity so it can carry dense agricultural and industrial liquids that would overload a standard 1.0-rated water tank. It measures 80 in long by 57 in wide by 48 in high, giving a 57.0 x 80.0 in footprint that sits low and stable on a skid, trailer, or truck bed. The horizontal leg design and sump bottom drain the tank toward a single low point - the sump is the intended outlet location, which is what you want for transfer and dispensing rather than long-term static storage.
Will it work for your load?
Empty, this is a 500-gallon vessel; filled with water it carries about 4,170 lb, and at its full 1.9 SG rating it is engineered for up to 7,923 lb of contents. Use those two numbers to size your trailer or mounting frame: water weight tells you the baseline, and the max-rated contents weight is your ceiling for heavier fertilizers and chemicals. The yellow polyethylene body and 57 x 80 in footprint make it a common pick for those searching for a 500 gallon horizontal leg tank for mobile fertilizer and chemical transfer. Run your dimensions and target liquid through the Tank Sizing Calculator and the Tank Sizing Guide before you commit to a mount, and check the technical drawing on this page for leg spacing and port locations.
Chemical compatibility
This tank is a 1.9 SG-rated polyethylene vessel. The resin is listed as high-density linear polyethylene (HDLPE) but unconfirmed, so verify HDLPE vs. XLPE (crosslinked) with us before putting this tank into chemical service, since the two resins differ in stress-crack and chemical resistance. The tank's port fittings are not specified for chemical service - the fitting and gasket materials below must be sourced and installed to match your liquid, and the sump drain fitting in particular has to be SG- and chemical-matched; call 866-418-1777 to spec them. All compatibility below is per the OEM chemical-resistance chart, which is concentration- and temperature-specific - match the chart to your exact strength and operating temperature, and pair the tank with the correct fitting and gasket materials shown:
- 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
Most ports here use PVC fittings with EPDM gaskets, but oxidizers and DEF need upgraded materials - peracetic acid requires Aflas gaskets, and DEF, peracetic acid, propylene glycol, and zinc orthophosphate require 316SS fittings. For the full picture, see the chemical compatibility reference. The mistake to avoid: the SG rating is the gate. A liquid can be chemically compatible with the polyethylene yet still be too dense to fill the tank - at 1.9 SG a full 500 gallons weighs the rated 7,923 lb, and a denser liquid would exceed the tank's structural rating, not just the weight budget. Confirm your liquid's specific gravity stays inside the 1.9 ceiling and match fittings and gaskets exactly to the chart above.
Freight
This tank ships LTL freight, quoted live to your ZIP from the Neche, ND plant where it is built. Because freight is rated separately from the tank, get an exact number with our Freight Cost Estimator before you order. For agricultural transport and DOT classification on leg and applicator tanks like this one, our guides on applicator and leg tanks for fertilizer, portable utility tanks and the 49 CFR ag exemption, and fertilizer-blend tank stratification are worth reading first. Questions on sizing, fittings, or freight? Call us at 866-418-1777.
