The Enduraplas 1550 Gallon White Cone Bottom Tank is a 1,550-gallon polyethylene vessel built for full-drain chemical and process service, where the cone discharge clears settled solids and lets the tank empty completely. It carries a 1.9 specific gravity rating, the maximum of the polyethylene scale, so it is engineered for dense liquids that a standard 1.0 or 1.5 SG water tank cannot safely hold. If you are deciding between this and other cone bottom tanks, this is the heavy-duty cone tank in the 1550 class.
Will this tank work for your application?
The tank stands 87 inches tall on an 85 x 85 inch footprint, so plan your cone stand and overhead fill clearance around those numbers. The cone shape means this tank must sit in a matching steel or poly cone stand rated for the load; it is not a flat-bottom tank and will not stand on its own. Filled with water (1.0 SG) the contents weigh 12,927 lb. At the full 1.9 SG rating, maximum rated contents weigh 24,561 lb. Spec your stand, anchors, and foundation to the actual fluid you are storing, not to water, and check the technical drawing on this page for outlet and fitting locations before you plumb it. We do not hold a factory fitting schedule for this SKU, so confirm the outlet and bulkhead configuration against the drawing or by phone before you order. For help matching the right cradle, see our Cone Bottom Tank Stand Compatibility Matrix, and use the Tank Sizing Calculator and Tank Sizing Guide to confirm 1,550 gallons fits your throughput.
Chemical compatibility
This tank is rated for 1.9 specific gravity, which is the maximum rating for polyethylene; for fluids denser than 1.9 SG you need a different material class, not another poly tank. The wall resin reads as HDLPE but is shown with a question mark in our records, so confirm whether your tank is linear (HDLPE) or cross-linked (XLPE) before placing it into chemical service. The two differ in resistance to strong oxidizers and acids, so a sulfuric 98% or sodium hypochlorite buyer in particular must verify the resin before ordering. All compatibility below is concentration- and temperature-specific per the OEM chemical-resistance chart; verify your exact concentration and operating temperature before committing.
At this SG rating the tank is suited to dense and aggressive chemistries including Sulfuric Acid at 98% (CPVC fittings, Viton gasket), Hydrochloric Acid at 37% (PVC, Viton), Phosphoric Acid at 85% (PVC, Viton), Ferric Chloride at 50% and Ferric Sulfate at 60% (PVC, EPDM), Hydrofluoric Acid at 48% and Hydrofluosilicic Acid at 26% (PP or PVC, Viton), and Sodium Hypochlorite below 16.5% (PVC, Viton). For water-treatment coagulants it handles Aluminum Sulfate at 50%, Polyaluminum Chloride, Sodium Carbonate at 30%, Potassium Hydroxide (saturated), and Zinc Orthophosphate (PVC or PP with EPDM unless noted). Oxidizers Hydrogen Peroxide at 50% (PVC, Viton), Peracetic Acid at 30% (316 stainless, Aflas), and Ozonated Water up to 10 PPM (PVC, EPDM) require their specified seal materials. It also handles Acetic Acid 60%, Calcium Chloride 40%, Magnesium Chloride 30%, Ferrous Sulfate 20%, Potassium Carbonate 50%, Sodium Bisulfate, Sodium Bisulfite, Sodium Thiosulfate 40%, DEF at 32.5% and Urea Solution at 50% (316 stainless or PP/PVC), Ethylene Glycol 100%, and Propylene Glycol. The fitting and gasket material listed for each chemical matters as much as the tank wall; pair the wrong elastomer and you will get a leak at the bulkhead long before the tank fails. Confirm every selection against the full Chemical Compatibility Database.
The mistake to avoid
The costliest error on a 1.9 SG cone tank is matching the fitting and gasket to the tank instead of to the chemical. The polyethylene wall may be fine, but a PVC bulkhead or an EPDM gasket on the wrong acid will weep and fail. For DEF, peracetic acid, and zinc orthophosphate, the chart calls for 316 stainless, not PVC; for hydrochloric, hydrofluoric, phosphoric, sulfuric, hydrogen peroxide, and sodium hypochlorite, it calls for Viton, not EPDM (and peracetic acid calls for Aflas). Match the fitting and gasket to your fluid every time. And do not assume a water-weight stand is enough: at full 1.9 SG load the contents reach 24,561 lb, nearly double the water figure.
This tank ships LTL freight from the Enduraplas plant in Neche, ND, with cost quoted live to your ZIP. At full 1.9 SG load the contents alone reach 24,561 lb, so confirm rigging, forklift or crane capacity, and pad strength at the delivery site before the truck arrives. Get your number with our Freight Cost Estimator or call 866-418-1777 to confirm the right cone bottom tank, stand, and fittings for your chemistry before you order.
