The Enduraplas 400 Gallon Yellow Horizontal Sump Bottom Leg Tank ships with its own frame and is built for hauling heavy liquids on a trailer or skid. The polyethylene tank carries a 1.9 specific gravity rating, which is the number that defines what this tank can do: it is engineered to hold dense agricultural and industrial fluids that would overload a standard 1.5-rated water tank. Listed at 400 gallon capacity, the horizontal leg tank measures 74 inches long by 46 inches wide by 45 inches high, with a 46.0 x 74.0 inch footprint and a sump bottom that drains toward the outlet for near-complete emptying. The yellow body makes this a common choice for fertilizer, anti-icing, and DEF transport where the load shifts in motion.
Will it carry your load
The 1.9 SG rating is what matters most here. Filled with plain water this tank holds roughly 3,336 pounds; at its full rated density it is built to carry up to 6,338 pounds of contents. That headroom is why this horizontal leg tank handles liquid fertilizer blends and brines instead of being limited to water, and at 1.9 SG the tank sits at the top of the polyethylene density range — a standard 1.5-rated tank would be over-filled by weight long before this one is. Size the load against your actual fluid density before you fill it, and use the Tank Sizing Calculator and Tank Sizing Guide to match gallons to weight for your application. Review the technical drawing on this page for the sump, outlet, and leg-frame layout before you plumb it.
Chemical compatibility
This is a 1.9 specific-gravity polyethylene tank, and the 1.9 rating is exactly what qualifies it for the heavy, aggressive chemicals listed below — fluids like sulfuric acid, ferric chloride, and calcium chloride brine are far denser than water and would over-weight a 1.5 tank. The tank resin is recorded as HDLPE but is not yet confirmed; confirm HDLPE versus XLPE with us before placing this tank into chemical service, because the resin choice changes what it can safely hold. Before you scan for your chemical, read the fitting and gasket column: the most expensive mistake on this tank is matching the chemical but using the wrong elastomer. Sodium hypochlorite and the strong acids below require Viton rather than EPDM, while DEF and peracetic acid require 316 stainless and Aflas. Compatibility, fitting material, and gasket selection are all concentration- and temperature-specific, so always confirm against the OEM chemical-resistance chart for your exact conditions. Within the 1.9 SG envelope, the following chemicals are listed as compatible:
- 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 (concentration not specified - confirm before service) - PVC fittings, EPDM gaskets
- Potassium Carbonate (50%) - PVC fittings, EPDM gaskets
- Potassium Hydroxide (saturated) - PVC fittings, EPDM gaskets
- Propylene Glycol (concentration not specified - confirm before service) - PP/316SS fittings, EPDM gaskets
- Sodium Bisulfate (concentration not specified - confirm before service) - PVC/PP fittings, EPDM gaskets
- Sodium Bisulfite (concentration not specified - confirm before service) - 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 (concentration not specified - confirm before service) - PP/316SS fittings, EPDM gaskets
- Ozonated Water (up to 10 PPM) - PVC fittings, EPDM gaskets (reference chart pending)
Confirm your selection on the OEM chemical-resistance chart for your concentration and temperature, and see our full chemical compatibility reference before you commit.
Freight and ordering
This horizontal leg tank with frame ships LTL freight from the Enduraplas plant in Neche, ND, quoted live to your ZIP code. Get your freight rate with the Freight Cost Estimator, and for fertilizer and applicator setups review our guides on applicator and leg tanks for fertilizer and fertilizer-blend tank stratification. Questions on fitting placement, frame mounting, or chemical service? Call 866-418-1777 before you order.
