The Snyder Industries 8700 Gallon Double Wall Tank (SKU 1006400N48) is a black crosslinked linear polyethylene (XLPE) tank that combines a primary tank and a secondary containment shell in a single footprint. It stands 197 inches tall on a 142 x 142-inch square base and carries a 1.9 specific gravity rating, meaning the wall thickness is engineered for dense contents, not water alone. If you are sizing a large-volume reservoir and weighing a single-wall tank against built-in containment, this is the black double wall Snyder tank that answers both at once.
Will it work for your site?
Two weights drive your foundation design. Filled with water, this tank holds roughly 72,558 pounds of contents; at its 1.9 specific gravity ceiling, the wall structure is rated to carry contents up to 137,860 pounds. Pour your pad for the heavier of the two loads you actually intend to store, not for water. The footprint is a 142 x 142-inch square standing 197 inches tall, so plan overhead clearance, crane reach, and lift rigging for a tank nearly 16.5 feet high before delivery day. It arrives with a flange fitting, an 18-inch threaded and vented opening, and a manway with a 15-inch access port for interior entry and maintenance. Fitting placement and elevations are shown on the technical drawing on this page; confirm your inlet, vent, and outlet geometry against it before you set piping. To translate your storage target into the right capacity and freeboard, run the numbers through our Tank Sizing Calculator and read the Tank Sizing Guide.
Why double wall XLPE
Crosslinked polyethylene builds a molecular structure that resists environmental stress cracking better than standard resins, which is why XLPE is specified for demanding storage and containment duty. The double wall configuration puts the interstitial space to work as secondary containment, so a breach in the primary wall is caught rather than released to the ground. Confirm any interstitial monitoring or access provisions against the technical drawing before you finalize your layout. At 1.9 specific gravity, this tank already sits at Snyder's heaviest-contents rating for this size, so there is no denser-content upgrade to chase. Because this is a tall reservoir tank, freeboard discipline matters: our guide on Snyder Captor double-wall freeboard sizing per ASTM D1998 walks through why the volume you can actually use differs from the nameplate capacity. If this tank is headed into fire-water or emergency reserve service, the fire-water reservoir design guide covers NFPA 22 sizing and cold-climate freeze protection.
The mistake to avoid
The most common error on a tank this size is underestimating the loaded weight and pouring a pad rated for water alone. Build the foundation for the actual contents you plan to store, up to that 137,860-pound ceiling. The second mistake is connection hardware: verify the manway and flange bolt circle and supply the correct gasket and bulkhead-fitting hardware to match your piping before the tank is set, because reworking connections on a 197-inch-tall tank after placement is not practical. Line up the 18-inch threaded and vented opening with your fill and vent plan, and confirm the manway access matches your maintenance approach. When wall thickness and headspace questions come up, the guide on wall thickness at the vapor-saturated headspace explains where premature failures tend to originate.
This tank ships LTL freight from the Snyder plant in Lincoln, Nebraska, quoted live to your ZIP code. Get an accurate number with our Freight Cost Estimator, or call 866-418-1777 and our team will handle the quote and delivery logistics with you.
