The 550 Gallon Double Wall Storage Tank from Snyder Industries is a cross-linked polyethylene (XLPE) double-wall tank rated to a 1.9 specific gravity, built for storage duty where a secondary containment layer matters. The inner tank holds 550 gallons inside an integral outer wall, so a leak is caught rather than lost to the ground. It measures 65" tall on a 76" x 76" footprint in natural white — a squat, wider-than-tall profile that keeps the center of gravity low.
Will it work for your site?
Because this is a double wall tank, plan the pad around the full 76.0 x 76.0 inch footprint and confirm the pour supports the loaded weight before setting it. Filled with water the tank carries roughly 4,587 lb; at its full 1.9 SG rating the contents can reach about 8,715 lb, so a concrete pad sized for that heavier load is the safe baseline. Our Tank Sizing Guide and Tank Sizing Calculator work through the numbers, and our pad-sizing write-up covers the ACI framework. The 1.9 SG rating is the top of Snyder's XLPE double-wall range, so it handles heavier-than-water contents a standard water tank would not — if your stored fluid is near or above 1.9 SG, call 866-418-1777 before ordering so we can confirm the fit.
Fittings and access
Per the technical drawing on this page, the tank is configured with a flange, an 18" polyethylene threaded and vented top opening, and a manway with 15" access for interior reach and inspection. These are all top-side openings — the drawing set does not list a factory-cut side or bottom outlet, so confirm whether your discharge point is field-added before you plan the plumbing run. Verify each fitting size and location against the drawing so the layout matches your inlet and vent routing.
Freeboard, use cases, and freight
On a Snyder double-wall design, size in the right freeboard so thermal expansion doesn't crowd the top fittings — our Captor freeboard write-up explains the usable-volume math per ASTM D1998. The common mistake on a storage tank this size is treating the nameplate 550 gallons as fully usable working volume. For containment-grade water duty, this XLPE double wall tank fits fire-water reservoir builds (see our NFPA 22 reservoir design guide) and quality-banded reuse trains (our industrial water reuse topology guide).
This storage tank ships LTL freight, with stock staged in West Virginia (Philippi, WV) and Mississippi — the Freight Estimator quotes live from the origin nearest your ZIP, so the number reflects the shortest lane. Get a rate in seconds with our Freight Cost Estimator, or call 866-418-1777 and we'll walk the delivery, pad, and fitting layout with you before you order.
