The Snyder Industries 750 Gallon HDLPE Vertical Double Wall Liquid Chemical Storage Tank is a Captor-style containment unit built for outdoor chemical service where a secondary barrier is required. The primary tank and an integral outer wall are molded from High Density Linear Polyethylene (HDLPE) in white, rated to a 1.9 specific gravity so it carries the full weight of dense chemicals without overstressing the wall. It holds 750 gallons and ships with ASTM certification. If you are weighing this double wall tank against a single-wall vertical storage tank for a regulated site, the built-in containment is the reason to choose it.
Will it work for your site?
At 750 gallons of water this vertical tank carries roughly 6,255 lb of contents; loaded to its maximum rated 1.9 specific gravity the contents reach about 11,884 lb, nearly double the water weight, so size the pad and anchoring to that 11,884 lb figure rather than the water number. Pack dimensions list a 73 x 73 inch footprint and a 66 inch height; because a footprint wider than the tank is tall is unusual for a vertical storage tank, treat those numbers as preliminary and confirm the height, footprint, and your full access path against the technical drawing on this page before delivery. Fittings are not yet listed for this SKU, so call 866-418-1777 to confirm the as-molded fitting, bulkhead, and penetration configuration before you finalize a layout. Never down-rate the pad or undersize the support ring to save space, since the 1.9 SG rating is exactly what lets this tank hold heavy acids and brines.
Chemical compatibility
This is an HDLPE tank rated to 1.9 specific gravity, and that rating is a load spec, not marketing copy, which is why a full chemical load reaches roughly 11,884 lb. The chemicals below are concentration- and temperature-specific, so verify your exact service conditions against the manufacturer's chemical-resistance chart before ordering fittings or gaskets. Compatibility includes acetic acid (60%, PP/PVC fittings, EPDM gaskets), aluminum sulfate (50%, PVC, EPDM), calcium chloride (40%, PVC, EPDM), DEF (32.5%, 316SS, EPDM), ethylene glycol (100%, PVC, EPDM), ferric chloride (50%, PVC, EPDM), ferric sulfate (60%, PVC, EPDM), ferrous sulfate (20%, PVC, EPDM), hydrochloric acid (37%, PVC, Viton), hydrofluoric acid (48%, PP/PVC, Viton), hydrofluosilicic acid (26%, PP/PVC, Viton), hydrogen peroxide (50%, PVC, Viton), magnesium chloride (30%, PVC, EPDM), peracetic acid (30%, 316SS, Aflas), phosphoric acid (85%, PVC, Viton), polyaluminum chloride (PVC, EPDM), potassium carbonate (50%, PVC, EPDM), potassium hydroxide (saturated, PVC, EPDM), propylene glycol (PP/316SS, EPDM), sodium bisulfate (PVC/PP, EPDM), sodium bisulfite (PVC/PP, EPDM), sodium carbonate (30%, PVC, EPDM), sodium hypochlorite (under 16.5%, PVC, Viton), sodium thiosulfate (40%, PVC, EPDM), sulfuric acid (98%, CPVC, Viton), urea solution (50%, PP/PVC, EPDM), zinc orthophosphate (PP/316SS, EPDM), and ozonated water (up to 10 PPM, PVC, EPDM). Most of these run on EPDM gaskets, but seven need Viton, which are hydrochloric acid, hydrofluoric acid, hydrofluosilicic acid, hydrogen peroxide, phosphoric acid, sodium hypochlorite, and sulfuric acid, and peracetic acid is the one chemical here that calls for an Aflas gasket. Match both the fitting material and the gasket to your specific chemical, and browse the full Chemical Compatibility Database to confirm before you specify.
The mistake to avoid
The single most common error on a double wall chemical tank is ordering before confirming the resin, fittings, and gasket. This tank is HDLPE rated to 1.9 SG, but the fitting and gasket material drive service life far more than the tank wall, and the wrong elastomer on a strong oxidizer or acid is what fails first. With no fitting list published for this SKU, confirm the penetrations on 866-418-1777 before you commit a piping layout. For SPCC-regulated installs, review our Snyder Captor SPCC 40 CFR 112 compliance walkthrough, and before you set the usable working volume read the Captor freeboard sizing per ASTM D1998 guide so thermal expansion and density are accounted for. If you are planning instrumentation, our level gauge selection guide and the note on HDPE wall thickness at the vapor-saturated headspace are worth reading before commissioning.
This double wall tank ships LTL freight from Snyder's plant in Chowchilla, California, quoted live to your ZIP code. Use the Freight Cost Estimator to price freight to your ZIP, size the order with our Tank Sizing Calculator and Tank Sizing Guide, or call 866-418-1777 to confirm fittings, freight, and lead time before you order.
