The Snyder Industries 1100 Gallon Captor Double Wall Tank (SKU 5470000N48) is built from crosslinked linear polyethylene (XLPE) in black, rated to a 1.9 specific gravity, and manufactured to ASTM standard. It pairs a primary storage tank with an integral secondary containment shell in one unit, so the tank body and its containment ship together, measuring 76 in wide by 76 in long and standing 104 in tall. If you are searching for a black XLPE double wall tank from Snyder, this is the 1100-gallon size in that family.
Will it work for your site?
Rated capacity is 1100 gallons in a 76 in x 76 in x 104 in (W x L x H) form. Filled with water, the contents weigh about 9,174 lb; at the tank's full 1.9 specific gravity rating the contents can reach roughly 17,431 lb, so plan your pad, anchoring, and structural support around that heavier figure. That 1.9 rating is a buying advantage, not just a load note: it means the tank already covers denser fluids such as acids and brines up to 1.9 SG without stepping up to a different unit. The square footprint concentrates the load, so a level, engineered pad rated for the loaded weight matters, and the 104 in height is worth checking against door, gate, and ceiling clearance on your receiving end. Use the Tank Sizing Calculator and the Tank Sizing Guide to confirm volume and clearances before you order.
Fittings and access
The technical drawing on this page shows the outfitting: a flange, an 18-inch PE threaded and vented fitting, and a manway with a 15-inch clear access opening. Size your inspection and cleaning plan to that 15-inch opening for interior entry and tooling. Because gasket and O-ring elastomer, not the XLPE shell, is usually the compatibility limit, confirm the flange bolt-up and manway seal materials suit your fluid, and make sure any field-added bulkhead or flange fittings match the 18-inch PE threaded port thread form. The secondary shell gives you built-in spill containment without a separate berm, which is why these Captor tanks are specified for SPCC-regulated and freeboard-sensitive service.
The mistake to avoid
The most common error with a double wall tank is treating rated capacity as usable capacity. ASTM D1998 sizing calls for freeboard, and thermal expansion plus fluid density change how much you can actually fill, so your usable volume is less than 1100 gallons. Read our guides on Captor freeboard sizing per ASTM D1998 and, if this tank supports an oil or chemical program, the SPCC 40 CFR 112 compliance walkthrough. For fire-water or cold-climate reservoirs, see the rural fire-water reservoir design guide and our note on wall thickness at the vapor-saturated headspace where premature failures often begin.
This tank ships by LTL freight from the Snyder plant in Philippi, West Virginia, quoted live to your ZIP, so Eastern and Midwest destinations typically see the lowest rates. Get a freight number with our Freight Cost Estimator using your exact delivery ZIP and any dock or liftgate needs (the 104 in height can affect trailer and handling), or call 866-418-1777 to confirm fittings and lock in your order before it leaves the plant.
