Enduraplas 4000 Gallon Green Cone Bottom Tank

The Enduraplas 4000 Gallon Green Cone Bottom Tank is a 4,000-gallon polyethylene cone bottom tank built for full-drain bulk chemical storage. Molded in green and carrying a 1.9 specific gravity rating, it stands 135 inches tall on a 110 x 110 inch footprint and discharges through its sloped cone bottom so heavy or settling product clears the tank without manual scraping. The 1.9 SG rating is the number that matters here: at 1.9 it sits at the top of the polyethylene density range, which is why this is a chemical-service cone bottom tank rather than a water-only vessel, and it means no higher-SG poly tank is needed for the chemistries below.

Will it work for your application?

Cone bottom tanks always sit elevated in a support stand so the cone can drain freely, so plan for the full assembly, not just the tank. At 4,000 gallons, a full water load is 33,360 pounds, and the maximum rated contents weight at the 1.9 specific gravity rating is 63,384 pounds. Both numbers drive your stand selection, foundation, and anchoring far more than the tank itself, so size the structure to the heaviest product you intend to store. Before you order a stand, read our Cone Bottom Tank Stand Compatibility Matrix covering Enduraplas alongside the other major brands, and run your volume through the Tank Sizing Calculator or the Tank Sizing Guide to confirm 4,000 gallons is the right capacity. See the technical drawing on this page for fitting locations and overall geometry before you finalize plumbing.

Chemical compatibility

This tank carries a 1.9 specific gravity rating. One thing to settle before you commit it to aggressive service: the exact polyethylene formulation in our data is listed as HDLPE but not yet confirmed, so verify linear HDPE versus crosslinked XLPE with us before storing strong oxidizers, since the two behave differently with certain chemistries. Beyond that, the 1.9 SG rating gives this tank broad chemical capability. Based on our chemical compatibility data, which is concentration- and temperature-specific, this tank is rated for chemicals including Acetic Acid (60%, PP/PVC fittings, EPDM gaskets), Aluminum Sulfate (50%, PVC, EPDM), Calcium Chloride (40%, PVC, EPDM), DEF (32.5%, 316SS fittings, 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 (under 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). Those fitting and gasket materials are your order checklist, not just a warning: the listed PVC, CPVC, PP, and 316SS bulkhead fittings with EPDM, Viton, or Aflas gaskets are the starting specs to buy alongside the tank, and we can supply them matched to your exact chemistry. Note the differences, sodium hypochlorite, sulfuric acid, and the peroxide and acid services above call for Viton, Aflas, or CPVC rather than standard EPDM. Always verify against the chemical compatibility data for your concentration and temperature, and browse our full Chemical Compatibility Database.

The mistake to avoid

The costliest error on a chemical cone bottom tank is mismatching the fitting and gasket to the product. The tank wall can be fully rated while the wrong elastomer at the outlet fails first, so use the materials listed above as your starting point and confirm them for your exact product. Equally important: do not under-build the stand. With a maximum rated contents weight of 63,384 pounds, your support structure and foundation are load-critical. Plan your top penetrations deliberately, too, so vent, fill, level, and drain do not conflict or cross-contaminate, and place your hazard labeling correctly for the product you store. If you are storing diesel exhaust fluid, this cone bottom is suitable for DEF and urea solution at 32.5% with 316SS fittings and EPDM gaskets, a common bulk use for this size.

Plan the rest of the install

For accurate top-fitting layout, see our guide on tank top fitting placement strategy, choose the right level sensing with our tank level gauge selection guide for chemical service, and get your hazard communication right with our tank label and signage compliance guide.

This cone bottom tank ships LTL freight from our plant in Neche, ND, with freight quoted live to your ZIP, so lead time and rate scale with distance from Neche. Get a ZIP-specific rate with our Freight Cost Estimator, or call 866-418-1777 to confirm stand options, fitting configuration, and delivery for your site.