The Snyder Industries 275 Gallon ASTM XLPE Black Double Wall Tank is a containment-grade vessel built from crosslinked linear polyethylene (XLPE) and rated to a 1.9 specific gravity, which is what separates it from an ordinary water tank. The integrated double wall delivers primary and secondary containment in a single footprint - no separate dike or basin to build. It stands 63 inches tall on a 47 x 47 inch footprint, so it holds full volume without sprawling across your pad. Filled with water it carries about 2,294 pounds; loaded to its maximum 1.9 SG rating it is engineered to hold up to 4,358 pounds, so the structure has real margin for dense liquids.
Will it work for your install
At 275 gallons in a 47-inch square footprint and 63 inches of height, this black Snyder double wall tank fits tight pads and indoor bays where a single-wall round tank plus a separate containment basin would not. The 1.9 SG rating means it is sized for liquids heavier than water - confirm your liquid's specific gravity falls at or under 1.9 before you commit. Top penetrations are straightforward to plan against:
- Top fitting: 18" PE threaded and vented
- Manway: 15" access
That layout handles fill, vent, and inspection from one working surface. For the exact port positions, see the technical drawing on this page. If you are still settling on volume, run the numbers through our Tank Sizing Calculator and check the approach in our Tank Sizing Guide. Because this is a tall, heavy LTL tank, it is worth pulling a freight number early with our Freight Cost Estimator before you finalize the pad.
The freeboard mistake to avoid
The most common error on a double wall tank like this is filling it to the brim. Thermal expansion and density both eat into the volume you can actually use, and the 1.9 SG rating only protects you when the tank is loaded within its design assumptions. If you are running anything other than water, the SG number alone is not the full gate - verify both that your fluid's specific gravity is at or under 1.9 AND that the fluid is compatible with the gasket and seal material at the 18" threaded fitting and the 15" manway, since those elastomer penetrations are where service failures usually start. Our guide to Snyder Captor double-wall freeboard sizing per ASTM D1998 walks through how thermal expansion, chemistry, and density set your real working volume.
Engineering detail before you spec
If you are weighing wall thickness and where premature failures originate, our breakdown of tank wall thickness at the vapor-saturated headspace is worth a read before you commit to the install. For buried outer-wall applications, the methodology in our cathodic disbondment testing piece covers the interstitial-space considerations for the steel-to-polyethylene boundary.
Freight and ordering
This double wall tank ships LTL freight from the Snyder plant in Marked Tree, Arkansas, with the cost quoted live to your ZIP - get an exact number through our Freight Cost Estimator or by calling 866-418-1777. Confirm your delivery site can receive an LTL carrier and that your forklift or equipment can handle a tank of this height and weight. Listed before freight. For help matching this black XLPE double wall tank to your application, our team is on the line at 866-418-1777.
