The Snyder Industries 8700 Gallon Vertical Double Wall Liquid Chemical Storage Tank pairs a primary chemical tank with an integral secondary containment shell, so a single unit handles both storage and the built-in backup barrier that aggressive chemical service demands. Molded in white from high density linear polyethylene and rated to 1.5 specific gravity, this vertical storage tank stands 197 inches tall on a 142 by 142 inch footprint. It arrives configured with a flange, an 18-inch threaded/vented fitting, and a manway with 15-inch access, giving you defined points for fill, vent, and interior service from the start. That 15-inch manway access is the practical entry for internal inspection and cleaning on a tank this tall, so confirm your tooling and entry plan against it if you expect periodic interior service.
Will this tank work for your application?
Sizing this double wall tank means planning for real loaded weight, not just gallons. Filled with water it carries 72,558 pounds, and at its maximum rated 1.5 SG contents it reaches 108,837 pounds. That number drives your pad design, foundation, and the equipment you stage for set. Treat 8700 gallons as the nominal nameplate, not your working volume: thermal expansion and product density eat into usable capacity, so size off freeboard-adjusted capacity using the guide on freeboard sizing per ASTM D1998. Run your fill level and product density through the Tank Sizing Calculator and review the Tank Sizing Guide before you commit a slab; the technical drawing on this page shows the fitting layout and the manway with 15-inch access so you can confirm clearances against your piping and rooftop access plan. As a vertical storage tank built for double wall containment, it is engineered for stationary chemical duty rather than transport.
Chemical compatibility
This is an HDLPE tank rated to 1.5 specific gravity. Shell rating alone is not enough: match your product to that 1.5 SG rating, then select the wetted fitting material and gasket elastomer on your manway, flange, and 18-inch threaded port to match your chemical's row below, and always confirm against the OEM chemical-resistance chart, which is concentration- and temperature-specific. The following chemicals are compatible at this tank's 1.5 SG rating: Acetic Acid at 60% with PP/PVC fittings and EPDM gaskets; Aluminum Sulfate at 50% with PVC fittings and EPDM gaskets; Calcium Chloride at 40% with PVC fittings and EPDM gaskets; DEF at 32.5% with 316SS fittings and EPDM gaskets; Ferrous Sulfate at 20% with PVC fittings and EPDM gaskets; Magnesium Chloride at 30% with PVC fittings and EPDM gaskets; Sodium Carbonate at 30% with PVC fittings and EPDM gaskets; Urea Solution at 50% with PP/PVC fittings and EPDM gaskets; and Ozonated Water up to 10 PPM with PVC fittings and EPDM gaskets. Note the fitting split: DEF needs 316SS hardware while the aqueous salts run on PVC. Browse the full Chemical Compatibility Database to verify your exact chemistry.
Several chemicals are storable in this resin but require a higher 1.9 SG tank rather than this 1.5 SG unit, so plan around the heavier-rated version for: Ethylene Glycol, Ferric Chloride, Ferric Sulfate, Hydrochloric Acid (Viton gaskets), Hydrofluoric Acid (Viton gaskets), Hydrofluosilicic Acid (Viton gaskets), Hydrogen Peroxide (Viton gaskets), Peracetic Acid (316SS fittings, Aflas gaskets), Phosphoric Acid (Viton gaskets), Polyaluminum Chloride, Potassium Carbonate, Potassium Hydroxide, Propylene Glycol, Sodium Bisulfate, Sodium Bisulfite, Sodium Hypochlorite (Viton gaskets), Sodium Thiosulfate, Sulfuric Acid (CPVC fittings, Viton gaskets), and Zinc Orthophosphate. Watch the gasket call on this group: Hydrochloric, Hydrofluoric, Hydrofluosilicic, Hydrogen Peroxide, Phosphoric, Sulfuric, and Sodium Hypochlorite all require Viton, and Peracetic Acid requires Aflas; putting EPDM on a Viton- or Aflas-required service is exactly the field-uncorrectable error to avoid. Ordering the correct SG rating up front is the single most common mistake on a double wall chemical tank this size, and a wrong-resin or under-rated tank cannot be fixed after it is installed. If you are storing sulfuric, hydrochloric, hypochlorite, peroxide, or another 1.9 SG chemical, call 866-418-1777 and we will spec the heavier-rated Snyder version with you instead.
Freight and ordering
This tank ships LTL from the Snyder Industries plant in Lincoln, Nebraska, with freight quoted live to your ZIP. Because of its 197-inch height and loaded-handling class, get an estimate before you order using the Freight Cost Estimator, and plan for the offload equipment a tank of this footprint requires. For containment design and instrumentation, the guides on Snyder Captor double-wall tanks for SPCC 40 CFR 112 compliance, tank level gauge selection, and spillover redundancy engineering walk through the rest of the system. Questions on fittings, SG rating, or freight to your site? Call 866-418-1777 and we will spec it with you.
