The Snyder Industries 6500 gallon double wall tank (SKU 5670000N48) is a black crosslinked linear polyethylene (XLPE) vessel rated to a 1.9 specific gravity, built for demanding aboveground bulk storage where a single-wall tank leaves you exposed. The XLPE resin and integral secondary containment are why this Snyder double wall tank gets specified for sites that need built-in spill protection without pouring a concrete berm. At 199 inches tall - roughly 16 feet 7 inches - on a 120 x 120 inch footprint, it holds 6,500 gallons within a compact square base.
Will it work for your site?
Plan your pad and supports around real numbers. Filled with water this tank carries roughly 54,210 pounds, and at its full 1.9 SG rating the contents can reach about 102,999 pounds - your foundation and any anchoring have to be engineered for the heavier figure, not the water figure. Run your capacity and pad layout through the Tank Sizing Calculator and the Tank Sizing Guide before you set concrete. The technical drawing on this page shows the fitting layout: a flange, an 18-inch PE threaded and vented fitting, and a manway with 15-inch access for interior entry and inspection. Plumb to the flange and the 18-inch PE threaded/vented fitting, and keep the vented fitting unobstructed - a blocked vent can pull a vacuum and collapse the wall on rapid drawdown. Confirm those fitting locations and elevations against your piping plan before install.
The double wall advantage
The interstitial space between the inner and outer walls is the point of this tank - it captures a leak from the primary before it reaches the ground, which is exactly what containment-driven codes are written around. This is a crosslinked (XLPE) shell rather than a standard HDPE tank, paired with integral secondary containment. For the freeboard and usable-volume math on double-wall sizing, see our guide on Snyder Captor double-wall freeboard sizing per ASTM D1998, and if you are integrity-testing the interstitial space, our reference on cathodic disbondment testing for double-wall interstitial spaces covers the methodology.
The mistake to avoid
The most common error on a tank this size is treating the water weight as the design load. This is a 1.9 SG-rated tank, and at full rated density the contents approach 103,000 pounds - size your foundation, ring, and any tie-downs to that number. The second mistake is assuming XLPE means chemical clearance for anything; the 1.9 SG rating speaks to density, not universal compatibility. If you are storing anything other than water, confirm the specific chemical against the OEM chemical-resistance chart at your concentration and temperature before you fill.
This black double wall tank ships LTL, quoted live to your ZIP, from Snyder's plant in Lincoln, NE. Get a real number for your delivery address with the Freight Cost Estimator, or call 866-418-1777 to talk through offload, access, and setup with a person before you order.
