The Snyder Industries 5500 Gallon ASTM Black Double Wall Tank (SKU 5660000N51) is a large-capacity double wall tank molded in high density linear polyethylene and rated to a 1.9 specific gravity, so the same shell that stores water is engineered to carry contents up to roughly 1.9 times the weight of water. That over-build is why it suits demanding potable and process-water bulk storage and leaves headroom if the site ever moves to a denser fluid. The double wall construction places one tank inside another, so a breach in the primary is captured by the outer shell instead of spilling to grade, which lets you skip a separate containment berm.
Specifications
- Capacity: 5,500 gallons (nominal)
- Material: High density linear polyethylene (HDLPE)
- Specific gravity rating: 1.9
- Color: Black
- Height x Width x Length: 172 x 120 x 120 in
- Footprint: 120 x 120 in
- Type: Double wall tank
- Ships from: Lincoln, NE
Will it work for your site?
The 5,500 gallon figure is the nominal shell volume; your real draw-down is less once you subtract the freeboard that double-wall polyethylene tanks require, so size to usable volume, not the label. Filled to nominal with water the tank holds about 45,870 lb, and at the 1.9 SG rating it is engineered for a maximum rated contents weight near 87,153 lb. Confirm your slab and any structural supports are rated for those numbers, then use the Tank Sizing Calculator and Tank Sizing Guide to match working volume to your demand. At 172 inches tall on a 120 x 120 inch base, this belongs on a level, engineered pad sized for a footprint that carries the full load.
Fittings, hookup, and leak monitoring
The technical drawing on this page shows a flange, an 18-inch PE threaded and vented fitting, and a manway with 15-inch access. Plumb to the flange and the threaded fitting using properly gasketed bulkhead and flange connections rated for your line size, and keep the vented fitting unobstructed so the tank breathes freely during fill and drain. The manway with 15-inch access is your entry point for inspecting the primary tank, and the annular space between the inner and outer walls is where you install leak detection. Review the drawing for exact fitting locations before you finalize plumbing.
Freight and ordering
This Snyder black double wall tank ships LTL freight from the Lincoln, NE plant, quoted live to your ZIP code. At 172 inches tall it moves as an oversized load, so pull an accurate number from our Freight Cost Estimator or call 866-418-1777 and we will arrange the carrier and confirm delivery access at your site. If you are engineering for fire-water reserve, freeboard, or cold-climate service, our guides on double-wall freeboard sizing per ASTM D1998, fire-water reservoir tank design, and wall thickness at the vapor-saturated headspace work through the math.
