The Enduraplas 400 Gallon Green Horizontal Sump Bottom Leg Tank with frame is a polyethylene horizontal leg tank built for transport and field use, where the wide stance and the sump-bottom drain matter as much as the volume. It holds 400 gallons, measures 74 inches long by 46 inches wide by 45 inches high, and rides on an integrated frame so it stays put on a trailer or skid. The tank carries a 1.9 specific gravity rating, which is what lets it haul dense agricultural and process liquids that a standard 1.5 SG water tank is not built for.
Will it work for your job
Sizing is the part most buyers underestimate. Filled with plain water this tank weighs about 3,336 pounds; loaded to its full 1.9 SG rating it can carry up to 6,338 pounds of contents. Confirm your trailer, hitch, and tow vehicle are rated for the loaded weight before you fill it, and run your numbers through the Tank Sizing Calculator or the Tank Sizing Guide if you are matching it to a route or spreader pass. The 46 x 74 inch footprint and 45-inch height determine how it beds on your trailer deck. The sump bottom is the feature that earns its keep on a haul tank: it lets the tank gravity-drain near-empty for a clean offload and changeover between loads, so you are not leaving heel volume behind. See the technical drawing on this page for fitting locations, leg layout, and the sump-bottom geometry.
Chemical compatibility
The resin for this tank is listed in our data as high-density linear polyethylene (HDLPE), but that designation is flagged unconfirmed. Because the resin grade is unconfirmed, treat the chemical list below as resin-dependent - confirm HDLPE versus cross-linked (XLPE) with us at 866-418-1777 before relying on any of it, because the right resin depends on the exact chemical and concentration. Compatibility is always concentration- and temperature-specific, so check the OEM chemical-resistance chart for your conditions and verify the right fitting and gasket materials before plumbing.
Chemicals the data supports for this resin and 1.9 SG rating, with the fitting and gasket materials to plumb them, include: Acetic Acid at 60% (PP/PVC fittings, EPDM gaskets); Aluminum Sulfate at 50% (PVC, EPDM); Calcium Chloride at 40% (PVC, EPDM); DEF at 32.5% (316SS fittings, EPDM gaskets); Ethylene Glycol at 100% (PVC, EPDM); Ferric Chloride at 50% (PVC, EPDM); Ferric Sulfate at 60% (PVC, EPDM); Ferrous Sulfate at 20% (PVC, EPDM); Hydrochloric Acid at 37% (PVC fittings, Viton gaskets); Hydrofluoric Acid at 48% (PP/PVC, Viton); Hydrofluosilicic Acid at 26% (PP/PVC, Viton); Hydrogen Peroxide at 50% (PVC, Viton); Magnesium Chloride at 30% (PVC, EPDM); Peracetic Acid at 30% (316SS fittings, Aflas gaskets); Phosphoric Acid at 85% (PVC, Viton); Polyaluminum Chloride (PVC, EPDM); Potassium Carbonate at 50% (PVC, EPDM); Potassium Hydroxide saturated (PVC, EPDM); Propylene Glycol (PP/316SS, EPDM); Sodium Bisulfate (PVC/PP, EPDM); Sodium Bisulfite (PVC/PP, EPDM); Sodium Carbonate at 30% (PVC, EPDM); Sodium Hypochlorite below 16.5% (PVC, Viton); Sodium Thiosulfate at 40% (PVC, EPDM); Sulfuric Acid at 98% (CPVC fittings, Viton gaskets); Urea Solution at 50% (PP/PVC, EPDM); and Zinc Orthophosphate (PP/316SS, EPDM). Ozonated Water up to 10 PPM (PVC, EPDM) is also supported as a reference entry. For full chemical references and gasket selection, see our chemical compatibility hub.
The mistake to avoid
The trap on this tank is plumbing it with the wrong fitting and gasket for your chemical. The list above is not one-size-fits-all: DEF and peracetic acid call for 316 stainless fittings, the aggressive acids - hydrochloric, hydrofluoric, sulfuric, phosphoric, hydrogen peroxide, and sodium hypochlorite - need Viton rather than EPDM, and peracetic acid needs Aflas. Match the fitting and gasket to your specific chemical and concentration, not just to the tank. And do not assume the 1.9 SG rating settles everything, because concentration changes the answer. If your liquid is denser or more aggressive than what is listed here, call before you buy.
This tank ships LTL freight from the Enduraplas plant in Neche, ND, with the cost quoted live to your ZIP - get your number from the Freight Cost Estimator or call 866-418-1777. For mounting and DOT considerations on horizontal leg and applicator tanks, our guides on applicator and leg tanks for fertilizer, portable utility tank DOT classification, and fertilizer-blend tank stratification are worth reading before you load it. Questions on fit or chemical service, call 866-418-1777.
