The Snyder Industries 3500 Gallon Sulfuric Acid Captor Double Wall Tank (SKU 5600000N30) is a secondary-containment vessel built for high-density chemical storage. It is molded from HDLPE resin #880046 in Opaque White, carries a 1.9 specific gravity rating, and stands 158 in tall on a 102 x 102 in square footprint. The integral double-wall design nests a primary tank inside an outer containment shell, so a leak is captured rather than released — the reason this Captor double wall configuration is built as a sulfuric acid containment tank.
Will it work for your application?
The 1.9 specific gravity rating is the number to check first. It means the wall is engineered to hold contents up to 1.9 times the weight of water, which is what makes it suitable for a dense, high-gravity acid rather than a standard 1.0 or 1.5 SG water tank. At full water it carries roughly 29,190 lb; at its maximum rated contents it is built for up to 55,461 lb. Confirm that your chemical's density falls at or below the 1.9 rating and that your pad is sized for that loaded weight. One planning note: the 3,500-gallon figure is nominal capacity — usable volume is lower once freeboard for thermal expansion and density is deducted, so work from the freeboard math before you commit to a size.
Sizing and the pad underneath it
A 102 x 102 in footprint at 55,461 lb loaded puts real bearing pressure on whatever it sits on. Run your numbers through the Tank Sizing Calculator and the Tank Sizing Guide, and if you are pouring new concrete, our walkthrough on concrete pad sizing for above-ground polyethylene tanks covers the ACI 360R-10 framework for exactly this kind of load. For freeboard and usable-volume planning specific to Captor double-wall units, see our guide on Captor freeboard sizing per ASTM D1998.
Compliance and the mistake to avoid
Double-wall containment is frequently specified to satisfy secondary-containment requirements. If this cap tank is part of a regulated install, our SPCC 40 CFR 112 compliance walkthrough shows where a Captor unit fits in that stack. Two things to confirm before you order. First, the fitting and vent schedule is not published on this listing, and the outer containment shell changes how nozzles and level access are configured versus a single-wall tank — call to confirm your exact fitting layout. Second, do not treat the 1.9 SG rating as a license for any chemical: verify your specific acid, concentration, and temperature against Snyder's chemical-resistance data, and confirm gasket and fitting materials for your service before filling.
This double wall tank ships LTL freight from Snyder's Lincoln, NE or West Virginia plant, whichever is nearer your delivery ZIP, quoted live before you buy. Get a real number in minutes with the Freight Cost Estimator, or call us at 866-418-1777 to confirm fittings, lead time, and delivery access for your site.
