The Snyder Industries 150 Gallon ASTM HDPE Black Double Wall Tank (SKU 5710102N51) gives you a primary storage vessel and an integral secondary containment shell in one 34 x 34-inch footprint, so you skip the separate spill basin entirely. It stands 62 inches tall, holds 150 gallons, and is molded from high density linear polyethylene rated to a 1.9 specific gravity. It ships LTL from the Snyder plant in Marked Tree, Arkansas, so get an exact freight number to your ZIP in seconds with the Freight Cost Estimator before you finalize. The black wall blocks light to slow algae, and the ASTM construction gives you a documented standard to build your inspection and compliance records around.
Why the 1.9 SG rating matters
This is not just a water tank. Rated to a 1.9 specific gravity, the shell carries up to 2,377 pounds of contents versus 1,251 pounds when it holds plain water. That headroom is exactly why this Snyder double wall model gets specified for dense fluids where a standard 1.0 to 1.1 SG water tank would be under-rated. If you are still balancing capacity against footprint, run your numbers through the Tank Sizing Calculator and cross-check the method in the Tank Sizing Guide so you order the right size the first time.
Slab, anchoring, and fittings
Set the pad for the load you will actually run. Across the 34 x 34-inch base, a full-water fill of 1,251 pounds works out to roughly 156 pounds per square foot, and more when you store a heavier fluid toward the 2,377-pound rating, so pour and anchor for the worst case, not the water case. For access, the tank comes with a 14-inch PE threaded and vented opening plus a manway with an 11-3/8-inch access. Fittings threading into the 14-inch PE port need a matching gasket sized to that thread, and the 11-3/8-inch manway sets the maximum diameter for any drop-in pump or level probe. Confirm every fitting location and thread detail against the technical drawing on this page before you plumb the install, and keep the interstitial space and vent path clear so the containment annulus can do its job.
Double wall sizing and inspection
Double wall polyethylene rewards a little engineering discipline. Freeboard and thermal-expansion allowance matter, and our guide on Snyder Captor double-wall freeboard sizing per ASTM D1998 walks through the real usable volume you should plan around. When you set your inspection routine, read HDPE tank wall thickness at the vapor-saturated headspace, where premature failures often start and where liquid-side checks tend to miss them. Sites building private fire reserves should also review our fire-water reservoir tank design guide for NFPA 22 sizing and cold-climate freeze protection.
Freight and how to order
This 150 gallon double wall tank ships LTL freight from Marked Tree, Arkansas, quoted live to your ZIP code. Pull an exact quote with the Freight Cost Estimator, or call us at 866-418-1777 and we will size, spec, and route it to your site. Tell us your delivery ZIP, whether you need a liftgate, and the fluid you are storing so we lock in the right tank and the best freight lane.
