The Enduraplas 550 Gallon Green Cone Bottom Tank (SKU THC00550G) is a polyethylene cone bottom tank built for full-drain chemical and process service where you need every gallon to discharge through the bottom. It holds 550 gallons, stands 59 inches tall on a 60 x 60-inch footprint, and carries a 1.9 specific gravity rating - heavy enough to handle dense chemicals that lighter-rated cone tanks cannot. The green resin and conical bottom make it a common pick for buyers searching a cone bottom tank, cone tank, or 550-gallon Enduraplas cone for batching, mixing, and complete gravity drainage.
Will it work for your application?
Match the tank to your contents by weight, not just volume. Filled with water this tank carries 4,587 lb, but the 1.9 SG rating means it is engineered for a maximum rated contents weight of 8,715 lb - so a denser chemical at full volume still stays inside the structural envelope. Because it is a cone bottom design, plan for a stand or skirt that holds the cone clear of the floor for gravity drainage; the Cone Bottom Tank Stand Compatibility Matrix covers stand pairing across Norwesco, Snyder, and Enduraplas. For deeper detail on this exact size, see the 550 Gallon Cone Bottom Tank with Poly Stand buyer's guide and the complete 550 gallon cone bottom buyer's guide. Confirm your outlet, fitting, and vent locations against the technical drawing on this page before ordering, and use the Tank Sizing Calculator and Tank Sizing Guide to size around your batch volume.
Chemical compatibility
This tank is polyethylene rated to 1.9 specific gravity. The resin record reads HDLPE with a question mark, so confirm whether your unit is HDLPE or XLPE before committing it to chemical service - that distinction materially changes resistance to oxidizers like sodium hypochlorite and hydrogen peroxide. The compatibility below is drawn from the OEM chemical-resistance chart and is concentration- and temperature-specific; verify your exact concentration and operating temperature against that chart before service.
Chemicals suited to this 1.9 SG poly tank, with the fitting and gasket material the chart calls out for each, include: Acetic Acid (60%, PP/PVC fittings, EPDM gaskets), Aluminum Sulfate (50%, PVC, EPDM), Calcium Chloride (40%, PVC, EPDM), DEF (32.5%, 316SS, EPDM), Ethylene Glycol (100%, PVC, EPDM), Ferric Chloride (50%, PVC, EPDM), Ferric Sulfate (60%, PVC, EPDM), Ferrous Sulfate (20%, PVC, EPDM), Hydrochloric Acid (37%, PVC, Viton), Hydrofluoric Acid (48%, PP/PVC, Viton), Hydrofluosilicic Acid (26%, PP/PVC, Viton), Hydrogen Peroxide (50%, PVC, Viton), Magnesium Chloride (30%, PVC, EPDM), Peracetic Acid (30%, 316SS, Aflas), Phosphoric Acid (85%, PVC, Viton), Polyaluminum Chloride (PVC, EPDM), Potassium Carbonate (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 (30%, PVC, EPDM), Sodium Hypochlorite (<16.5%, PVC, Viton), Sodium Thiosulfate (40%, PVC, EPDM), Sulfuric Acid (98%, CPVC, Viton), Urea Solution (50%, PP/PVC, EPDM), Zinc Orthophosphate (PP/316SS, EPDM), and Ozonated Water (up to 10 PPM, PVC, EPDM). Match the fitting and gasket material to each chemical, not to the tank - note where the chart calls for Viton or Aflas instead of EPDM, and CPVC, 316SS, or PP instead of PVC. Cross-check every selection in our Chemical Compatibility Database.
The mistake to avoid
The most common error on a cone bottom chemical tank is matching the gasket and fitting to the tank instead of to the chemical. This tank's 1.9 SG poly body handles the chemicals above, but hydrochloric, hydrofluoric, hydrofluosilicic, phosphoric, and sulfuric acid plus hydrogen peroxide and sodium hypochlorite all require Viton gaskets, and peracetic acid requires Aflas - an EPDM gasket on any of those services will fail. Those same services also call for PVC, CPVC, 316SS, or PP fittings rather than a default. And do not assume the base resin: confirm HDLPE versus XLPE before introducing aggressive chemistry. If you are also specifying instrumentation, our guide on Tank Level Gauge Selection for Chemical Service walks through radar, ultrasonic, hydrostatic, and magnetostrictive options.
This tank ships LTL from the Enduraplas plant in Neche, ND, with freight quoted live to your ZIP - and from a single upper-Midwest origin, distant ZIPs carry real LTL cost, so run your number early with the Freight Cost Estimator. Or call 866-418-1777 to confirm fittings, resin grade, and the best routing for your delivery.
