The Enduraplas 5000 Gallon Black Cone Bottom Tank (SKU THC05000B) is built for full-drain bulk chemical service where you cannot leave product sitting on the floor of the tank. Molded in black polyethylene with a 1.9 specific gravity rating, this cone bottom holds 5,000 gallons and stands 166 inches tall on a 110 x 110 inch footprint. The 1.9 SG rating is the number that matters here: it is the heaviest-duty rating offered in this line, engineered to carry dense chemical loads rather than just water, which is why it suits the acids, brines, and coagulants that a standard 1.0 or 1.5 SG tank would not safely hold. Because 1.9 is the top rating, there is no higher-SG tank to step up to for the chemistries listed below.
Will it work for your application?
Run the weight math before you commit to a stand or pad. Filled with water this tank carries roughly 41,700 lbs; at its full 1.9 SG rating it is engineered to hold contents up to about 79,230 lbs, which is nearly twice the water weight. Size the cone bottom stand and foundation for that worst-case ~79,230 lb load, not for water, and for the actual weight of YOUR chemical at YOUR fill level. Use the Tank Sizing Calculator and Tank Sizing Guide to convert gallons of your specific chemical into pounds, then confirm the stand against our Cone Bottom Tank Stand Compatibility Matrix. The 110-inch footprint and 166-inch overall height also set your building clearance and stand height, so verify both against the technical drawing on this page before you build anything underneath it.
Chemical compatibility
This tank is polyethylene rated to 1.9 specific gravity. The resin shown in our data is listed as HDLPE with an open question, so treat resin confirmation as a gating step, not a footnote: for any of the strong acids and oxidizers below (sulfuric, hydrochloric, hydrofluoric, hydrogen peroxide, peracetic, sodium hypochlorite), whether your unit is HDLPE or XLPE changes suitability, so confirm the resin with us at 866-418-1777 before you order for chemical service. Every pairing below should also be checked against the OEM chemical-resistance chart, which is concentration- and temperature-specific; a fitting and gasket that hold at ambient can fail at elevated temperature. At the 1.9 SG rating this tank is suited to dense chemistries including Sulfuric Acid (98%, CPVC fittings, Viton gaskets), Phosphoric Acid (85%, PVC, Viton), Hydrochloric Acid (37%, PVC, Viton), Hydrofluoric Acid (48%, PP/PVC, Viton), Hydrofluosilicic Acid (26%, PP/PVC, Viton) and Ferric Chloride (50%, PVC, EPDM). It also handles Sodium Hypochlorite below 16.5% (PVC, Viton), Hydrogen Peroxide (50%, PVC, Viton) and Peracetic Acid (30%, 316SS, Aflas) for oxidizer duty.
For coagulants and salts it covers Aluminum Sulfate (50%, PVC, EPDM), Ferric Sulfate (60%, PVC, EPDM), Ferrous Sulfate (20%, PVC, EPDM), Polyaluminum Chloride (PVC, EPDM; concentration not specified in our data - confirm before service), Calcium Chloride (40%, PVC, EPDM), Magnesium Chloride (30%, PVC, EPDM), Sodium Thiosulfate (40%, PVC, EPDM), Sodium Bisulfate (PVC/PP, EPDM; concentration not specified - confirm before service), Sodium Bisulfite (PVC/PP, EPDM; concentration not specified - confirm before service), Zinc Orthophosphate (PP/316SS, EPDM; concentration not specified - confirm before service) and Potassium Carbonate (50%, PVC, EPDM). Caustics include Potassium Hydroxide (Saturated, PVC, EPDM) and Sodium Carbonate (30%, PVC, EPDM). For fluids and glycols it suits DEF at 32.5% (316SS, EPDM) and Urea Solution at 50% (PP/PVC, EPDM), Ethylene Glycol (100%, PVC, EPDM), Propylene Glycol (PP/316SS, EPDM; concentration not specified - confirm before service), Acetic Acid (60%, PP/PVC, EPDM) and Ozonated Water up to 10 PPM (PVC, EPDM). See the full Chemical Compatibility Database for the linked detail page on each chemical, such as sulfuric acid, sodium hypochlorite and DEF.
Fittings, the two material outliers, and the mistake to avoid
Match your fitting and gasket material to your chemical, not to convenience. Two pairings in this set stand apart and are worth sourcing up front: Sulfuric Acid 98% is the only chemical here that calls for CPVC fittings rather than standard PVC or PP, and Peracetic Acid 30% is the only one that requires Aflas gaskets instead of EPDM or Viton. Most salts and caustics stay on PVC with EPDM, while aggressive oxidizers and strong acids move to Viton, and DEF and peracetic run on 316SS. The single most common mistake on a cone bottom this size is treating the 1.9 SG rating as a license to store anything dense without checking the specific chemical, concentration, and temperature, then bolting on the wrong gasket. Plan your top penetrations deliberately using our fitting placement strategy guide, choose the right level instrument with our tank level gauge selection guide, and label the finished installation correctly per our tank labeling and signage compliance guide.
This 5000 gallon Enduraplas cone bottom tank ships LTL freight from the plant in Neche, North Dakota, quoted live to your ZIP. Because it leaves a single North Dakota plant, your freight distance and cost scale with how far you are from there, so get your exact number with the Freight Cost Estimator rather than guessing, or call 866-418-1777 to talk through stand sizing, resin confirmation, fitting and gasket selection, and delivery for your chemical program.
