The Snyder Industries 6500 Gallon Plastic Vertical Double Wall Liquid Chemical Storage Tank is a White, 6,500-gallon vertical storage tank molded from High Density Linear Polyethylene (HDLPE) and rated to a 1.9 specific gravity. The integral double-wall design holds the primary tank inside a secondary shell, giving you built-in spill containment for aggressive chemical service without a separate outer basin. It stands 199 inches tall on a 120-inch (10 ft) diameter footprint, and the structure is engineered for heavy contents: full water weight is roughly 54,210 lb, and the tank carries a maximum rated contents weight near 102,999 lb at its 1.9 SG rating. At 1.9 specific gravity this is the highest-density rating offered in the 6500-gallon vertical class, so no heavier tank is required for dense acids or concentrated brines that would overload a standard 1.0 to 1.5 water-rated unit.
How it works for your install
Plan the fitting layout against the drawing before you order hardware. The technical drawing on this page shows a flange fitting, an 18-inch PE threaded/vented fitting, and a manway with 15-inch access for entry, gauging, and ventilation. Match every bulkhead fitting, valve, and gasket to the chemical you are storing rather than reusing a generic water-tank kit. Because loaded contents on a tank this size can approach 100,000 lb, the pad, anchoring, and access platform all need to be sized to the loaded weight, not the empty shell — plan a slab at least 120 inches (10 ft) in diameter. Use the Tank Sizing Calculator and the Tank Sizing Guide to confirm your volume, fill height, and weight loading before the slab is poured.
Chemical compatibility
This is an HDLPE vertical tank rated to a 1.9 specific gravity, so it covers a wide band of municipal and industrial chemicals at full strength. Always confirm your chemical, its concentration, and its temperature against the OEM chemical-resistance chart, which is concentration and temperature specific, and match the fitting and gasket materials below. Compatible chemicals on this resin and SG include Acetic Acid (60%, PP/PVC fittings, EPDM gaskets, details), Aluminum Sulfate (50%, PVC, EPDM, details), Calcium Chloride (40%, PVC, EPDM, details), DEF (32.5%, 316SS, EPDM, details), Ethylene Glycol (100%, PVC, EPDM, details), Ferric Chloride (50%, PVC, EPDM, details), Ferric Sulfate (60%, PVC, EPDM, details), Ferrous Sulfate (20%, PVC, EPDM, details), Hydrochloric Acid (37%, PVC, Viton, details), Hydrofluoric Acid (48%, PP/PVC, Viton, details), Hydrofluosilicic Acid (26%, PP/PVC, Viton, details), Hydrogen Peroxide (50%, PVC, Viton, details), Magnesium Chloride (30%, PVC, EPDM, details), Peracetic Acid (30%, 316SS, Aflas, details), Phosphoric Acid (85%, PVC, Viton, details), Polyaluminum Chloride (PVC, EPDM, details), Potassium Carbonate (50%, PVC, EPDM, details), Potassium Hydroxide (saturated, PVC, EPDM, details), Propylene Glycol (PP/316SS, EPDM, details), Sodium Bisulfate (PVC/PP, EPDM, details), Sodium Bisulfite (PVC/PP, EPDM, details), Sodium Carbonate (30%, PVC, EPDM, details), Sodium Hypochlorite (under 16.5%, PVC, Viton, details), Sodium Thiosulfate (40%, PVC, EPDM, details), Sulfuric Acid (98%, CPVC, Viton, details), Urea Solution (50%, PP/PVC, EPDM, details), Zinc Orthophosphate (PP/316SS, EPDM, details), and Ozonated Water (up to 10 PPM, PVC, EPDM). Browse the full Chemical Compatibility Database for any chemical not listed here.
The mistake to avoid
Note that the resin here is HDLPE rather than XLPE; if your application specifies XLPE, confirm the resin with us before committing the tank to chemical service. Gasket and fitting choices are not interchangeable across this list: aggressive oxidizers and strong acids such as Hydrochloric Acid, Hydrogen Peroxide, Sulfuric Acid, and Sodium Hypochlorite call for Viton gaskets, not the EPDM you would use on salts and glycols, and Sulfuric Acid at 98% specifically calls for CPVC fittings rather than plain PVC. DEF (32.5%) and Peracetic Acid (30%) both require 316SS fittings, and Peracetic Acid is the one chemical on this list that calls for Aflas gaskets — confirm those before plumbing. For double-wall containment under federal SPCC rules, confirm the secondary containment volume meets your 110% requirement with us before ordering, then walk through the Snyder Captor double-wall SPCC 40 CFR 112 guide; for level monitoring on a tank this tall, review level gauge selection for chemical service. Two detailed overviews of the 6500-gallon vertical class are also available here and here.
This double wall vertical storage tank ships LTL freight from the Snyder plant in Lincoln, NE, with the rate quoted live to your ZIP. Get your number in seconds with the Freight Cost Estimator, or call 866-418-1777 to confirm fittings, gaskets, and delivery for your chemical before you order.
