The Snyder Industries 5500 Gallon ASTM XLPE Double Wall Tank (SKU 5660000N46) is a black crosslinked linear polyethylene (XLPE) double wall tank built for high-density liquid storage where secondary containment is required. It holds 5,500 gallons in a 120-inch by 120-inch footprint and stands 172 inches tall, giving you full containment in a single unit rather than a tank-plus-basin arrangement. The crosslinked resin carries a 1.5 specific gravity rating, so it is engineered to hold contents substantially heavier than water. If you are weighing this Snyder double wall tank against a single-wall build, start with the two questions that actually drive the decision: will it carry your contents, and what will it cost to get it to your site.
Specifications at a glance
Capacity: 5,500 gallons. Footprint: 120 x 120 inches. Height: 172 inches. Material: crosslinked linear polyethylene (XLPE). Color: black. Wall construction: double wall with an interstitial containment space. Specific gravity rating: 1.5. These are the numbers to scan before you go further, and every one of them ties back to the technical drawing on this page.
Will it handle your contents?
Filled with water, this tank carries roughly 45,870 pounds. At its 1.5 specific gravity rating, the maximum rated contents weight climbs to about 68,805 pounds, which is the figure that matters when you are storing something denser than water. That 1.5 rating is the ceiling here, so verify your contents fall at or below it before you commit. Because the loaded tank concentrates that weight across a 120 x 120-inch footprint, the pad sees on the order of 478 pounds per square foot fully loaded, so spec the slab and anchoring to the loaded figure, not the empty tank. The XLPE wall and the double wall construction are what let this unit carry that load while keeping any leak from the primary contained in the interstitial space. Our Tank Sizing Calculator and Tank Sizing Guide will help you match capacity and footprint to the volume you actually need to store.
Fittings, access, and sealing
Per the technical drawing on this page, this tank is configured with a flange, an 18-inch PE threaded and vented fitting, and a manway with 15-inch access. The vented fitting matters: an enclosed tank filling and draining needs to breathe, and running it sealed is a common and avoidable mistake that can deform the wall. The manway with 15-inch access gives you an inspection and cleanout point into the primary. One step buyers skip: confirm the gasket and seal material on the threaded fitting and manway against your fluid's chemistry before service, since the elastomer is specified per order and is not shown on the drawing. Review the technical drawing on this page for exact fitting locations and orientation before you plumb the site.
Freight and how to order
This Snyder double wall tank ships LTL from the Snyder plant in Lincoln, Nebraska, and freight is quoted live to your ZIP rather than bundled into the list price. Because a 5,500-gallon black tank standing 172 inches tall is an oversized load, the delivery detail matters as much as the tank spec. Run your ZIP through our Freight Cost Estimator for a live LTL quote, or call 866-418-1777 and we will work the shipment with you. For the engineering behind double wall freeboard and usable volume, see our guide on Snyder Captor double-wall freeboard sizing per ASTM D1998, and for cold-climate installations our fire-water reservoir design guide covers freeze protection and reservoir sizing discipline.
