The Chem-Tainer 1000 gallon 20-degree open-top cone-bottom tank (SKU TC6672CA) is a polyethylene vertical built for bulk chemical batching where you need the contents to drain to a near-empty heel. It stands 72 inches tall on a 66 x 66 inch footprint, holds a rated 1,000 gallons, and carries a 1.5 specific gravity rating, so it is engineered to hold liquids up to 1.5 times the weight of water. The 20-degree cone bottom and open top make it a working tank for mixing, settling, and gravity discharge rather than a sealed storage vessel - exactly the kind of open top cone bottom tank operators reach for when batch turnover matters.
Will it work for your application?
Match the contents to the 1.5 SG rating before you buy. At full water-equivalent fill the tank carries roughly 8,340 lb; at its maximum rated 1.5 SG contents that climbs to about 12,510 lb on the same 66 x 66 inch footprint, so your pad, ring, or slab has to be engineered for the heavier number, not the water figure. Confirm the load path holds the rated weight and that the cone bottom is fully supported by a stand or cradle, since cone-bottom tanks are not self-supporting and rest in a structural frame. Cross-check overall height and the cone discharge against the technical drawing on this page before you spec your stand. If you are unsure which capacity fits your batch volume and floor space, run the numbers through the Tank Sizing Calculator and the Tank Sizing Guide. For drainage behavior, our comparison of Chem-Tainer cone-bottom 30 vs 45 degree drainage and residual heel shows how cone angle drives how completely the tank empties and how it handles solids.
Chemical compatibility
Resin grade is shown as HDLPE but flagged unconfirmed in our data, so call 866-418-1777 to verify HDLPE versus XLPE before chemical service - the two resins differ in chemical resistance, and the SG rating on this unit is 1.5. Always verify against the OEM chemical-resistance chart for your exact concentration and temperature, since compatibility is concentration- and temperature-specific. This tank ships without fittings; the PVC, PP, and 316 stainless fittings and EPDM, Viton, or Aflas gaskets referenced below are specified separately to match your chemical.
Within the 1.5 SG rating, this tank is compatible with the following at the listed concentrations: Acetic Acid at 60%, Aluminum Sulfate at 50%, Calcium Chloride at 40%, DEF at 32.5%, Ferrous Sulfate at 20%, Magnesium Chloride at 30%, Sodium Carbonate at 30%, Urea Solution at 50%, and Ozonated Water up to 10 PPM. Most of these call for PVC fittings with EPDM gaskets; Acetic Acid and Urea Solution work with PP or PVC fittings on EPDM. Only DEF among the compatible chemicals requires 316 stainless fittings - all others run PVC or PP. Ozonated Water is compatible on PVC and EPDM but does not yet have a dedicated compatibility page, so confirm that one by phone. Verify each fitting and gasket material against the chart for your service.
Several chemicals you may be considering are too dense for this 1.5 SG tank and need a higher 1.9 SG vessel instead: Ethylene Glycol, Ferric Chloride, Ferric Sulfate, Hydrochloric Acid, Hydrofluoric Acid, Hydrofluosilicic Acid, Hydrogen Peroxide, Peracetic Acid, Phosphoric Acid, Polyaluminum Chloride, Potassium Carbonate, Potassium Hydroxide, Propylene Glycol, Sodium Bisulfate, Sodium Bisulfite, Sodium Hypochlorite, Sodium Thiosulfate, Sulfuric Acid, and Zinc Orthophosphate. If your process uses any of these, step up to the 1.9 SG version - storing them in this tank risks deformation and failure. Note that several of these do not run on EPDM: hydrochloric, hydrofluoric, hydrofluosilicic, hydrogen peroxide, phosphoric, sodium hypochlorite, and sulfuric all require Viton gaskets, peracetic acid requires Aflas, and sulfuric needs CPVC fittings rather than PVC. Full data lives in our Chemical Compatibility Database.
The mistake to avoid
The single most common error on a cone-bottom chemical tank is the top-fitting layout. Because the top is open and the cone discharges from the bottom, vent, fill, and level connections all compete for the same crowded top surface, and a bad layout drives cross-contamination and operator error. Plan it before you order using our guide to tank top fitting placement strategy, and review the 1000 gallon cone-bottom buyer's guide and the cone-angle selection guide to confirm the 20-degree cone fits your drainage and solids-handling needs.
This tank ships LTL freight from the nearest Chem-Tainer plant in our network - Hanford, CA or Hummelstown, PA - with the carrier and cost quoted live to your ZIP. Get your number from the Freight Cost Estimator or call 866-418-1777 to lock in freight and confirm the resin and SG match your chemical before you order.
