The Enduraplas 4000 Gallon Green Cone Bottom Tank with Stand is a full-drain vessel built for chemical batching, blending, and dosing where the tank must empty completely through the bottom. Standing 146 inches tall on a 110-inch diameter footprint, it pairs a molded polyethylene cone tank with its supporting stand so gravity carries your product to a single low outlet. It carries a 1.9 specific gravity rating, an empty weight of 1,100 pounds, and is FDA Approved. If you are weighing a steel frame against a poly stand for this class of tank, our cone bottom tank stand selection decision tree and the Norwesco, Snyder, and Enduraplas stand compatibility matrix walk through the trade-offs.
Will it work for your process
Plumbing comes off a 3-inch PP female NPT bulkhead fitting at the cone outlet, with a 16-inch threaded vented manway up top for filling, inspection, and mixer access. See the technical drawing on this page for the stand geometry and fitting placement. The 1.9 SG rating is the number that matters most on a cone tank: it tells you the maximum contents density the wall is engineered to hold. Filled with water this tank carries 33,360 pounds; at its full 1.9 SG rating it is rated for up to 63,384 pounds of contents. Because the entire load sits on the stand, confirm your slab and anchoring suit that weight before you fill. Use the Tank Sizing Calculator and Tank Sizing Guide to match your 4000 gallon volume and product weight against the stand rating.
Chemical compatibility
This is a polyethylene cone tank rated to 1.9 specific gravity. The resin is recorded as HDLPE with a question mark, so confirm HDLPE versus XLPE before committing to chemical service — the distinction changes how the wall holds up against oxidizers such as sodium hypochlorite. The compatibility below comes from the Snyder Industries OEM chemical resistance chart and is concentration and temperature specific; verify your exact chemical, concentration, temperature, and fitting plus gasket materials before ordering. The fitting and gasket callouts are the OEM recommendation for each chemical, not what ships on the tank.
Because this tank is rated to 1.9 SG, every chemical on the resistance chart is cleared at or below its rating — there is no heavier-wall upgrade needed for these services. Products that use the full rating include Sulfuric Acid (98%, CPVC fittings, Viton gaskets), Hydrochloric Acid (37%, PVC, Viton), Hydrofluoric Acid (48%, PP/PVC, Viton), Phosphoric Acid (85%, PVC, Viton), Hydrogen Peroxide (50%, PVC, Viton), Sodium Hypochlorite (under 16.5%, PVC, Viton), Ferric Chloride (50%, PVC, EPDM), Ferric Sulfate (60%, PVC, EPDM), Ethylene Glycol (100%, PVC, EPDM), Potassium Hydroxide (saturated, PVC, EPDM), Potassium Carbonate (50%, PVC, EPDM), Peracetic Acid (30%, 316SS, Aflas), Hydrofluosilicic Acid (26%, PP/PVC, Viton), Sodium Thiosulfate (40%, PVC, EPDM), Polyaluminum Chloride (PVC, EPDM), Sodium Bisulfate and Sodium Bisulfite (PVC/PP, EPDM), Propylene Glycol and Zinc Orthophosphate (PP/316SS, EPDM), and Ozonated Water (up to 10 PPM, PVC, EPDM). Lower-density services carry real headroom against the 1.9 rating: DEF (32.5%, needs SG 1.35, 316SS, EPDM), Urea Solution (50%, SG 1.35, PP/PVC, EPDM), Acetic Acid (60%, SG 1.5), Aluminum Sulfate (50%, SG 1.5), Calcium Chloride (40%, SG 1.5), Magnesium Chloride (30%, SG 1.5), Ferrous Sulfate (20%, SG 1.5), and Sodium Carbonate (30%, SG 1.5). Full details, concentration by concentration, are in our Chemical Compatibility Database.
The mistake to avoid
Do not spec fittings by convenience. The chart pairs a specific fitting and gasket material to each chemical, and the wrong elastomer — EPDM where Viton or Aflas is required — is the most common failure on cone tanks running oxidizers and strong acids. The 3-inch outlet ships as PP with NPT threads, so acid services like sulfuric (CPVC) and sodium hypochlorite (PVC/Viton) will need a different wetted fitting and gasket than what comes on the tank. Match the gasket to your chemical, and if you are near the 1.9 SG ceiling, do not overload the stand.
This 4000 gallon Enduraplas cone bottom tank ships LTL from our plant in Neche, ND, with freight quoted live to your ZIP. Get a freight quote with the Freight Cost Estimator or call 866-418-1777 to confirm fittings, stand rating, and chemical service before you order.
