The Snyder Industries 4500 Gallon Double Wall Tank is a black crosslinked polyethylene (XLPE) vessel built for high-volume water storage where secondary containment is non-negotiable. It stands 197 inches tall on a 102 by 102 inch square footprint, holding 4,500 gallons inside an integrated outer wall that captures any leak from the primary tank. The crosslinked resin carries a 1.9 specific gravity rating, meaning this is the heaviest-liquid tier in the XLPE class. You are not sizing down to a lighter tank that you would have to re-buy if your stored fluid ever gets denser. Black color blocks light to discourage algae growth in stored water.
Will it work for your site
Foundation first, because the numbers are large. Filled with plain water this tank weighs 37,530 pounds, but its structure is rated to carry up to 71,307 pounds of contents at the full 1.9 specific gravity, roughly double the water-full load. That is the number your pad has to answer to. The base has to be a level, engineered foundation sized for the 102 by 102 inch square footprint, never bare or sloped ground. This is also a tall vessel at 197 inches, about 16.4 feet, standing on an 8.5-foot square base, so confirm your fill point and roofline clear 16.4 feet and that your site can crane and upright a tank this tall before you commit to a location. If you are matching capacity to demand, our Tank Sizing Calculator and Tank Sizing Guide walk through usable volume versus rated volume.
Double wall and freeboard
The double wall design gives you built-in containment without pouring a separate berm, which is why these tanks show up in fire-water reservoirs and remote sites where a spill cannot be allowed to reach the ground. Two things are worth understanding before you buy: how much freeboard to leave for thermal expansion, and where wall stress actually concentrates. Our guide on Captor double-wall freeboard sizing per ASTM D1998 covers the real volume you can actually use, and the writeup on wall thickness at the vapor-saturated headspace explains where premature failures originate. For fire-protection layouts, see our rural fire-water reservoir design guide.
The mistake to avoid
Do not under-build the foundation for the rated load. People size the pad for water weight when the structure is actually rated for more than 71,000 pounds of contents. Match the base to the density of what you will store, and keep it dead level. One more item to settle before you order: fitting and outlet configuration is not standardized on this listing, so review the technical drawing on this page and call 866-418-1777 to confirm outlet size, thread, and gasket for your application.
This double wall tank ships LTL from Snyder's plant in Lincoln, Nebraska, quoted live to your ZIP. Get a freight quote with our Freight Cost Estimator or call 866-418-1777 to confirm foundation, fittings, and lead time before you order.
