The Enduraplas 4000 Gallon White Cone Bottom Tank with Stand (SKU THC04000KW) is a full-drain, SG 1.9-rated polyethylene vessel built for processing and chemical batching where you need the tank to empty completely. It stands 146" tall on a 110"-diameter footprint, weighs about 1,100 lb empty, and carries an FDA-approved natural white resin body. The 1.9 specific gravity rating is the number that matters here: it defines how heavy a liquid this tank and its stand are engineered to hold, and it is what makes this 4000 gallon tank suitable for dense chemical service rather than water storage alone.
Will it work for your liquid?
Filled with water, contents weigh roughly 33,360 lb; at the tank's maximum 1.9 SG rating the contents can reach 63,384 lb, so your foundation, containment, and the included stand all have to be sized for the actual weight of what you are storing. Liquid discharges through a 3" PP female NPT bulkhead fitting at the cone tip, and you access the tank through a 16" threaded vented manway on top. Confirm your target fill against the SG rating before ordering, and use the Tank Sizing Calculator and Tank Sizing Guide to verify weights and footprint for your pad. Because this is a cone bottom design on a stand, review stand fit first: our stand selection decision tree and the Norwesco, Snyder, and Enduraplas compatibility matrix walk through steel-frame versus poly-stand tradeoffs.
Chemical compatibility
This tank is a natural white polyethylene body rated to 1.9 specific gravity. The resin is listed as HDLPE but unconfirmed — confirm HDLPE versus XLPE with us before committing this tank to chemical service, because crosslinked and linear polyethylene behave differently against some chemicals. The chemistries below come from the Snyder Industries OEM chemical resistance chart and are concentration- and temperature-specific; verify your exact chemical, concentration, temperature, and fitting and gasket materials before ordering. At its 1.9 SG rating this tank supports storage of Ethylene Glycol (100%, PVC/EPDM), Ferric Chloride (50%, PVC/EPDM), Ferric Sulfate (60%, PVC/EPDM), Hydrochloric Acid (37%, PVC/Viton), Hydrofluoric Acid (48%, PP or PVC/Viton), Hydrofluosilicic Acid (26%, PP or PVC/Viton), Hydrogen Peroxide (50%, PVC/Viton), Phosphoric Acid (85%, PVC/Viton), Sodium Hypochlorite (under 16.5%, PVC/Viton), Sulfuric Acid (98%, CPVC/Viton), Peracetic Acid (30%, 316SS/Aflas), Potassium Hydroxide (saturated, PVC/EPDM), Potassium Carbonate (50%, PVC/EPDM), Sodium Thiosulfate (40%, PVC/EPDM), Polyaluminum Chloride (PVC/EPDM), Sodium Bisulfate (PVC or PP/EPDM), Sodium Bisulfite (PVC or PP/EPDM), Propylene Glycol (PP or 316SS/EPDM), Zinc Orthophosphate (PP or 316SS/EPDM), and Ozonated Water (up to 10 PPM, PVC/EPDM). Because this is a North Dakota-built tank aimed at the ag and fluid-handling market, note the DEF and fertilizer chemistries too: DEF (32.5%) and Urea Solution (50%) both need lower minimum SG ratings that this 1.9 tank clears easily, but DEF requires 316SS fittings with an EPDM gasket and urea requires PP or PVC with EPDM — not the stock PP bulkhead assumption. Lower-SG chemistries such as Acetic Acid (60%, PP or PVC/EPDM), Aluminum Sulfate (50%, PVC/EPDM), Calcium Chloride (40%, PVC/EPDM), Ferrous Sulfate (20%, PVC/EPDM), Magnesium Chloride (30%, PVC/EPDM), and Sodium Carbonate (30%, PVC/EPDM) are covered by this 1.9-rated tank as well. This is a representative view of the chart — confirm your exact chemical against our full Chemical Compatibility Database, which is concentration- and temperature-specific.
The mistake to avoid
The most common error on a cone bottom chem tank this size is bolting the as-shipped 3" PP bulkhead onto an aggressive oxidizer or a DEF line and assuming it will hold. That standard PP fitting is fine for the EPDM-gasket chemistries above, but hydrochloric, sulfuric, and hydrogen peroxide service require Viton or CPVC trim, sodium hypochlorite and hydrofluoric acid need Viton, peracetic acid needs 316SS with Aflas, and DEF needs 316SS with EPDM. Read the fitting and gasket callout for your specific chemical, match the trim to your fluid, and confirm the resin is the right polyethylene grade before you fill.
This tank ships LTL from our plant in Neche, ND, quoted live to your ZIP. Get an exact number with the Freight Cost Estimator, or call 866-418-1777 to confirm resin grade, fitting trim, and delivery for your chemical.
