The Snyder Industries 8700 Gallon Double Wall Tank (SKU 1006400N46) is a black, crosslinked linear polyethylene (XLPE) vessel built for large-volume water and liquid storage where a secondary containment wall is required. This is a genuine double wall build - an inner tank inside an outer shell with a monitorable interstitial space - standing 197 inches tall on a roughly 142-inch diameter footprint. It holds a nominal 8,700 gallons and carries a 1.5 specific gravity rating, meaning the tank structure is rated for liquids up to 1.5 times the density of water. That 1.5 SG figure is the ceiling for this unit; plain water at 1.0 SG sits well inside the structural margin.
Will it work for your site?
Start with weight, because a black double wall tank this size is a foundation decision before it is a plumbing decision. Filled with water, the contents alone weigh roughly 72,558 lb - your normal operating load. At the tank's maximum rated 1.5 SG contents the load reaches about 108,837 lb, and that is the number your pad, ring wall, or slab has to carry. Design the base to the rated worst case, not just the water weight. The 142-inch diameter and 197-inch height also decide whether the tank clears gates, doorways, and overhead obstructions on the approach, so measure the true circular clearance along the delivery path before you order. If you are still confirming volume against draw-down and freeboard, run the numbers with our Tank Sizing Calculator and the Tank Sizing Guide.
Fittings and access
Per the technical drawing on this page, this Snyder XLPE tank is configured with a flange, an 18-inch threaded and vented fitting, and a manway with 15-inch access for entry, inspection, and cleaning. Gasket and bolt-pattern details are not part of the listing data, so confirm the flange and manway gaskets, plus fitting locations and elevations, against the drawing before you set final plumbing - inlet, outlet, and vent placement drive how you route pipe on a tank this tall. Because it is an XLPE double wall unit, follow ASTM D1998 sizing discipline for freeboard and thermal expansion; our guide on Captor double-wall freeboard sizing walks through real usable volume versus nominal capacity, and for cold-climate or private fire-protection use the fire-water reservoir design guide covers NFPA 22 sizing and freeze protection.
The mistake to avoid
The common error on a tank this size is under-building the base or under-estimating the set. This is a molded XLPE double wall tank, not a light single-wall poly tote - plan for a heavy placement and confirm your equipment can position a vessel of this diameter and height.
This tank ships LTL freight from the Snyder plant in Lincoln, NE, quoted live to your ZIP - get a number in seconds with our Freight Cost Estimator or call 866-418-1777. Freight is quoted separately from the list price; nothing here is delivered-included.
