The Snyder Industries 750 Gallon ASTM Black Double Wall Tank is a containment-grade vessel for sites that need primary storage and built-in secondary containment in one footprint. It holds 750 gallons in the inner tank, stands 67 inches tall, and sits on a 73 x 73 inch square footprint. The black shell is molded from high density linear polyethylene (HDLPE) and rated to a 1.9 specific gravity, the heavier-density-rated build that brings buyers searching "double wall tank," "black tank," and "750 gallon" to this Snyder unit.
Will it work for your site?
This is a true double-wall design: a primary inner tank inside an outer containment tank, so a leak in the inner wall is captured by the interstitial space rather than released. Plan your pad and equipment around the 73 x 73 inch footprint, and confirm overhead clearance above the 67-inch shell for your fill line, ladder, or hose drop before you set it. On weight, a full load of water runs about 6,255 lbs, while at the tank's 1.9 specific gravity rating the maximum rated contents weight climbs to roughly 11,884 lbs. That spread is the whole point of this tank: if you are storing anything heavier than water (many chemicals and slurries push past 1.0 SG), the 1.9 rating is what you are paying for, and the pad, anchoring, and any structure underneath must be designed to the full 11,884 lb figure, not to water. Run the numbers with the Tank Sizing Calculator and the Tank Sizing Guide before you pour a pad.
Fittings and leak detection
Fitting sizes and locations are not listed in the spec table for this tank. Confirm the inlet, outlet, and vent thread sizes from the technical drawing on this page before ordering bulkhead fittings or gaskets, so your plumbing and seals are spec'd to what the tank actually has. Just as important on a double-wall unit: find the interstitial monitoring point on that same drawing. A primary-wall leak is only useful if you can detect it, not just contain it, so locate that access port and tie it into whatever inspection or monitoring routine the site uses.
The mistake to avoid
Don't size to the nameplate gallons and forget freeboard. Double-wall storage tanks expect headspace for thermal expansion and fluid density, so the volume you can actually use is less than the rated 750 gallons. Our guide on Captor double-wall freeboard sizing per ASTM D1998 walks through how to calculate usable volume so you don't come up short. And treat the 1.9 specific gravity as a ceiling for fluid density, not a license to ignore the load it puts on the foundation.
How it ships
This tank is made in California and ships LTL by freight from the Snyder plant in Chowchilla, CA. Because it is a large double-wall vessel, freight is quoted live to your ZIP rather than bundled into the list price. Get a number for your delivery address with the Freight Cost Estimator, or call us at 866-418-1777 and we will quote it and answer setup questions. Review the technical drawing on this page for fitting, interstitial, and dimensional detail before you finalize your install.
