The Enduraplas 1350 Gallon Black Cone Bottom Tank with Stand (SKU THC01350KB) is a 1.9 specific-gravity-rated polyethylene tank built for storage and dispensing where the cone bottom drains solids and sediment cleanly to a single low point. It stands 86 inches tall on an 85-inch-diameter footprint, ships with the included stand that carries the cone, and uses an FDA-approved resin. Empty tank weight is 300 pounds, so plan your offload equipment for the tank-and-stand assembly on arrival. Because this is an inference-tier dimension record, confirm whether the 86-inch height is tank-only or overall with the stand from the Enduraplas drawing (see the technical drawing on this page) before you pour a slab or set anchor points to it.
Will it work for your application
The tank is plumbed with a 3-inch PP female NPT bulkhead fitting at the cone tip for gravity draw or pump feed, and a 16-inch threaded vented manway up top for filling, inspection, and dosing. That vent matters: it lets the tank breathe as you fill and empty, which prevents the vacuum collapse that plagues sealed poly tanks. Sizing is where most buyers make their call. Filled with water this 1350 gallon tank holds about 11,259 pounds; at its full 1.9 SG rating the contents can reach roughly 21,392 pounds, so the stand pad, anchoring, and floor slab must be rated for the heavier chemical load, not the water figure. Run your product through the Tank Sizing Calculator and the Tank Sizing Guide before you commit to a location.
Chemical compatibility
This is a polyethylene tank rated to 1.9 specific gravity, matched against the Snyder Industries OEM chemical-resistance chart. The resin is recorded as HDLPE with a question mark, so confirm HDLPE versus XLPE with us before any oxidizer duty — crosslinked and high-density linear behave differently against strong oxidizers, and this verification should happen pre-order, not after delivery. Chart compatibility is concentration- and temperature-specific; verify your exact chemical, concentration, temperature, and the fitting and gasket materials before ordering. At its 1.9 SG rating this tank covers the heaviest listed products: Sulfuric Acid (98%, CPVC fittings, Viton gasket), Hydrochloric Acid (37%, PVC, Viton), Phosphoric Acid (85%, PVC, Viton), Ferric Chloride (50%, PVC, EPDM), Sodium Hypochlorite (under 16.5%, PVC, Viton), Hydrogen Peroxide (50%, PVC, Viton), Hydrofluoric Acid (48%, PP/PVC, Viton), and Peracetic Acid (30%, 316SS fittings, Aflas gasket), among others such as Potassium Hydroxide. One thing to plan for: the included fitting is 3-inch PP, and PP is not the recommended contact material for those oxidizers — sulfuric wants CPVC, HCl/HF/peroxide/hypochlorite want PVC with Viton, and peracetic wants 316SS with Aflas — so budget a fitting and gasket upgrade for that service rather than treating the stock bulkhead as turnkey. Lighter-duty chemicals that only need a 1.35–1.5 SG tank, such as DEF (32.5%, 316SS fittings), Urea Solution (50%), Calcium Chloride (40%) and Acetic Acid (60%), are all covered here, though a lower-SG tank may serve them at lower cost. Note that DEF is stainless-sensitive and calls for 316SS at metallic contact points — no copper, brass, or carbon steel. Always cross-check the full Chemical Compatibility Database against your operating temperature.
Choosing the stand
The cone bottom needs a matched stand to carry the load; a mismatched or undersized frame is the most common and most expensive mistake on these tanks. Our steel-frame vs polyethylene stand decision tree and the Norwesco, Snyder, and Enduraplas stand compatibility matrix walk through which frame fits which tank.
This 1350 gallon Enduraplas black cone bottom tank ships LTL from the plant in Neche, North Dakota, and freight is quoted live to your ZIP — get a number in seconds with the Freight Cost Estimator or call 866-418-1777 to confirm resin, upgrade fittings, and settle stand selection and delivery.
