The Snyder Industries 5000 Gallon ASTM Black Double Wall Tank (SKU 5630000N49) is a 5,000-gallon double wall polyethylene tank that holds liquid in the primary tank while an integral outer wall gives you built-in secondary containment, so you do not have to pour a separate berm. It stands 216 inches tall on a 102 x 102 inch footprint, so confirm your pad size and overhead clearance before it arrives. The black resin blocks light to resist algae growth in stored water; just expect the contents to run warmer in direct sun. The tank carries a 1.5 specific gravity rating, which covers water and heavier liquids up to that density.
Will it work for your site
Filled with water, this tank puts roughly 41,700 pounds on your foundation, and at its full 1.5 SG rating the contents can reach about 62,550 pounds. That load demands a properly engineered pad, not compacted gravel alone. The 102 x 102 inch square footprint is your planning number for containment area and setbacks. If you are matching tank volume to demand or drawdown, run the numbers through our Tank Sizing Calculator and the Tank Sizing Guide before you lock in this size.
Fittings, access, and leak detection
Per the technical drawing on this page, this double wall tank is configured with a flange, an 18-inch PE threaded and vented fitting, and a manway with 15-inch access. That manway is how you inspect the interstitial space between the walls, which is the whole point of a double wall over a single tank plus berm: the outer wall becomes your leak-detection boundary. Confirm fitting elevations against the drawing before you plumb, since inlet, outlet, and vent placement drive your pump and overflow design, and keep the vent path clear so the tank does not deform under fill and draw. The pack lists fitting types but not gasket material, so match the flange and bulkhead gaskets to your stored liquid before commissioning.
Double-wall sizing and freeboard
Double wall polyethylene tanks have real freeboard and usable-volume considerations that catch buyers off guard once thermal expansion and liquid density enter the math. Our guide on Snyder Captor double-wall freeboard sizing per ASTM D1998 walks through the real volume you can actually use. If this is a fire-water reservoir, the rural fire-water reservoir design guide covers NFPA 22 sizing and cold-climate freeze protection, and the discussion of HDPE wall thickness at the vapor-saturated headspace explains where premature failures actually start.
This 5000 gallon black double wall Snyder tank ships by LTL freight from the Snyder plant in Lincoln, Nebraska, quoted live to your ZIP based on distance and delivery access. Get your number from the Freight Cost Estimator or call 866-418-1777 and we will help you confirm the drawing, size the fittings, and set up delivery.
