The Norwesco 1720 Gallon 15 Degree Cone Bottom Tank is a closed-top vessel molded from High Density Linear Polyethylene (HDLPE), carrying a 1.9 specific gravity rating that puts it in genuine chemical-service territory rather than water-only duty. It holds 1,720 gallons inside a 15-degree cone that drives complete drainage toward a single low point, and the blue resin cuts light transmission to slow algae and biological growth in stored product.
Footprint: 91" x 91", 78" tall (bare tank, before stand). Because the cone requires elevation, plan for an as-installed height well above 78" once it sits on a stand, and verify pad, doorway, and overhead clearance against that taller number.
Will it handle your contents
The 1.9 SG rating is the number to plan around. Full of water this tank weighs roughly 14,345 lb, while its maximum rated contents weight is 27,255 lb. Across 1,720 gallons that works out to a ceiling of about 15.8 lb per gallon, which is what lets it carry a denser chemical up to a 1.9 specific gravity only when filled to nameplate volume. Multiply your fluid's specific gravity by its volume to confirm you stay inside that ceiling before filling. A cone bottom on a 15-degree slope is the gentlest of the cone angles, so it suits suspensions and slurries that drain steadily rather than needing the aggressive 30 or 45 degree pitch; the Norwesco cone bottom buyer's guide walks through that 15-vs-30-vs-45-degree trade-off, and the 1720 gallon 15-degree complete buyer's guide covers this size specifically. Since the cone has to be supported off the ground, check the cone bottom tank stand compatibility matrix before ordering a stand.
Chemical compatibility
This is an HDLPE tank rated to 1.9 specific gravity. Compatibility always depends on concentration, temperature, fitting material, and gasket material, so match every component to the chemical you are storing and verify against the manufacturer's concentration- and temperature-specific chemical-resistance chart. The fastest way to read this is by gasket risk. Most salts, glycols, and DEF run on EPDM gaskets: acetic acid (60%, PP/PVC), aluminum sulfate (50%, PVC), calcium chloride (40%, PVC), DEF (32.5%, 316SS), ethylene glycol (100%, PVC), ferric chloride (50%, PVC), ferric sulfate (60%, PVC), ferrous sulfate (20%, PVC), magnesium chloride (30%, PVC), polyaluminum chloride (PVC), potassium carbonate (50%, PVC), potassium hydroxide (saturated, PVC), propylene glycol (PP/316SS), sodium bisulfate (PVC/PP), sodium bisulfite (PVC/PP), sodium carbonate (30%, PVC), sodium thiosulfate (40%, PVC), urea solution (50%, PP/PVC), zinc orthophosphate (PP/316SS), and ozonated water (up to 10 PPM, PVC). The aggressive oxidizers and strong acids require a Viton gasket instead: hydrochloric acid (37%, PVC), hydrofluoric acid (48%, PP/PVC), hydrofluosilicic acid (26%, PP/PVC), hydrogen peroxide (50%, PVC), phosphoric acid (85%, PVC), and sodium hypochlorite (under 16.5%, PVC). Two services need special materials: sulfuric acid (98%) moves the fitting up to CPVC with a Viton gasket, and peracetic acid (30%) calls for 316SS fittings with an Aflas gasket. Each linked chemical page carries the detail for that service; start at the Chemical Compatibility Database to cross-reference your contents.
The mistake to avoid
The most common error on a 1.9 SG cone tank is matching the resin and weight but mismatching the gasket. A standard EPDM gasket on a Viton-required chemical will fail at the fitting long before the tank ever does, so spec the gasket and fitting material to the chemical, not to the tank. Tell us what you are storing and we will spec the bulkhead fitting and gasket material before you order, for example CPVC with Viton for 98% sulfuric acid or 316SS with Aflas for peracetic acid. Storing something above 1.9 SG? Call before ordering, because this is the 1.9-rated model. Confirm your numbers with the Tank Sizing Calculator and Tank Sizing Guide.
This cone bottom tank ships LTL freight from the nearest Norwesco plant, either Shawnee, OK or St. Bonifacius, MN, with freight quoted live to your ZIP. Get your estimate with the Freight Cost Estimator or call 866-418-1777 to confirm fittings, stand options, and the right gasket for your chemical before you order.
