The Snyder Industries 360 Gallon Double Wall Tank is a black crosslinked polyethylene (XLPE) tank with a full secondary wall around the primary, so a primary leak is caught in the interstitial space instead of reaching your pad. It holds 360 gallons in a 53 in by 53 in footprint at 63 in tall, carries a 1.9 specific gravity rating, and ships LTL from Snyder's plant in Marked Tree, Arkansas. The double-wall build plus the XLPE shell and 1.9 SG margin mean this tank is engineered for aggressive, high-density, or chemical service - if you are running near-1.0 water, you are buying spare structural margin and integral secondary containment that you would otherwise have to add with a separate basin.
Will it work for your site?
The tank fills to roughly 3,002 lb with water and the wall is rated to carry up to 5,705 lb of contents at its 1.9 specific gravity ceiling. That spread is the whole reason to pay for a 1.9-rated tank: full water loads your pad to about 3,002 lb, but a denser liquid fills the same footprint with roughly 2,700 lb more pad load - so size the slab and any structure underneath for the densest liquid you will ever store, not just the water number. The 53 in by 53 in footprint is your planning dimension for spacing and clearances. Top access comes through an 18 in PE threaded and vented fitting plus a manway with a 15 in access opening; see the technical drawing on this page for fitting placement and exact heights before you set anchors or plumb the vent.
Verify the fittings before you plumb
The 18 in PE threaded and vented fitting is your primary plumbing and venting point - confirm your fill and vent connections thread into the PE bung and that you are not counting on a gasketed flange the drawing does not show. The 15 in manway access is for reaching the primary and inspecting the interstitial space, not a bulk fill port. Stay inside the fittings shown on the drawing rather than assuming a flange or gasket that is not in the manifest. If you are still confirming that 360 gallons matches your draw and refill cycle, run it through the Tank Sizing Calculator and the Tank Sizing Guide.
The mistake to avoid
The 1.9 specific gravity rating is a ceiling, not a license to skip the math. It means the wall is rated for liquids up to 1.9 times the weight of water; near-1.0 service gives you generous margin, but you still size for the loaded weight and you still set the tank on a flat, fully supported base - double wall tanks tolerate point-loading no better than single wall. And on a double-wall tank the rated capacity and the working capacity are not the same number once you account for freeboard. The guide on Snyder Captor double-wall freeboard sizing walks through the real usable volume inside a tank like this.
This double wall tank ships LTL freight from Marked Tree, Arkansas, quoted live to your ZIP - get your number from the Freight Cost Estimator or call 866-418-1777 and we will quote it with you. Freight is separate from the listed price.
