The Norwesco 4950 Gallon 15 Degree HDPE Vertical Cone Bottom Tank (SKU N-45383) is a blue, full-drain cone bottom tank molded in high density linear polyethylene and rated to 1.9 specific gravity, which is what lets it hold heavy treatment and industrial chemistries that a standard 1.0-1.5 SG water tank cannot. It stands 159 inches tall on a 102 x 102 inch footprint, holds 4,950 gallons, and the 15-degree cone is the gentlest of the cone angles - it drains thicker or settling liquids better than a flat-bottom vertical while keeping overall height lower than a steeper 30- or 45-degree cone. See the technical drawing on this page for the cone geometry, fitting locations, and overall dimensions before you build a stand.
Will it work for your application
Plan your support structure around weight, not just gallons. Filled with water this tank carries 41,283 lb, and at its full 1.9 SG rating the contents can reach 78,438 lb - roughly 1.9 times the water weight, so a stand engineered to the water figure would be under-built by about 37,000 lb. Your cone stand and pad have to be sized for the heavier number, and a 15-degree cone needs a properly sized stand to elevate the outlet for full gravity drainage. If you are choosing between cone angles or matching a stand, the Norwesco cone bottom tank buyer's guide, the 4950 gallon 15 degree complete buyer's guide, and the cone bottom tank stand compatibility matrix walk through sizing. Use the Tank Sizing Calculator and Tank Sizing Guide to confirm capacity and footprint against your space.
Chemical compatibility
This tank is high density linear polyethylene (HDLPE) rated to 1.9 specific gravity, which makes it a true chemical-service vessel rather than a repurposed water tank. The 1.9 SG rating is the heavy-duty tier, and it already spans the full compatibility list below - including dense, aggressive chemistries like sulfuric acid at 98% and ferric chloride - so there is no heavier-rated tank you need to step up to for these services. Compatibility always depends on concentration and temperature, so match your chemical, its strength, and your fitting and gasket materials against the OEM chemical-resistance chart for this resin at your specific concentration and temperature. The single most common - and most expensive - mistake on a cone bottom chemical install is the gasket and fitting pairing: the right tank with the wrong gasket still leaks. EPDM is the default gasket across most of the list, but several common chemistries demand something specific - the strong acids (sulfuric, hydrochloric, hydrofluoric, phosphoric), hydrogen peroxide, and sodium hypochlorite need Viton; peracetic acid needs 316SS fittings with Aflas; and DEF requires 316SS. Note also that the fittings and gaskets are specified by chemical service and are sourced and sized separately - they are not pre-installed - so confirm your bulkhead and outlet hardware against your chemistry before you order.
Verified-compatible chemistries for this HDLPE/1.9 SG tank include sulfuric acid (98%, CPVC fittings, Viton gaskets), hydrochloric acid (37%, PVC, Viton), hydrofluoric acid (48%, PP/PVC, Viton), hydrofluosilicic acid (26%, PP/PVC, Viton), phosphoric acid (85%, PVC, Viton), acetic acid (60%, PP/PVC, EPDM), peracetic acid (30%, 316SS, Aflas), hydrogen peroxide (50%, PVC, Viton), sodium hypochlorite (under 16.5%, PVC, Viton), sodium carbonate (30%, PVC, EPDM), potassium carbonate (50%, PVC, EPDM), aluminum sulfate (50%, PVC, EPDM), ferric chloride (50%, PVC, EPDM), ferric sulfate (60%, PVC, EPDM), ferrous sulfate (20%, PVC, EPDM), polyaluminum chloride (PVC, EPDM), calcium chloride (40%, PVC, EPDM), magnesium chloride (30%, PVC, EPDM), sodium bisulfate (PVC/PP, EPDM), sodium bisulfite (PVC/PP, EPDM), sodium thiosulfate (40%, PVC, EPDM), potassium hydroxide (saturated, PVC, EPDM), zinc orthophosphate (PP/316SS, EPDM), DEF (32.5%, 316SS, EPDM), urea solution (50%, PP/PVC, EPDM), ethylene glycol (100%, PVC, EPDM), propylene glycol (PP/316SS, EPDM), and ozonated water (up to 10 PPM, PVC, EPDM). A few entries - polyaluminum chloride, propylene glycol, sodium bisulfate, sodium bisulfite, and zinc orthophosphate - are listed without a concentration in our data, so confirm their strength against the OEM chart before you specify hardware. Browse every entry in the Chemical Compatibility Database and verify against the OEM chart at your specific concentration and temperature before you commit.
Geometry and selection
If you are weighing cone, doorway, vertical, and horizontal shapes for the same job, the Norwesco geometry selection guide maps each shape to its best use case. People shopping this tank often search for a vertical cone bottom HDPE tank from Norwesco, and the 15-degree cone is the version that balances full drainage with a manageable installed height.
This tank ships LTL freight from the Norwesco plant in Albertville, Alabama, with the rate quoted live to your ZIP - get your number from the Freight Cost Estimator or call us at 866-418-1777 and we will quote it for you. Have your delivery ZIP and any liftgate or limited-access needs ready so we can lock the freight before you order.
