The Snyder Industries 10,000 Gallon Captor Double Wall liquid storage tank is a containment-built vessel molded in High Density Linear Polyethylene (HDLPE) and rated to a 1.5 specific gravity, meaning the resin and wall section are engineered to hold liquids up to one-and-a-half times the weight of water. It is a tank-within-a-tank double wall design: the inner primary vessel does the storing, the outer wall catches anything the primary ever lets go. That structure is why operators reach for this Snyder double wall storage tank when secondary containment is the requirement rather than an afterthought, and it ships from Snyder's Lincoln, Nebraska plant.
Will this double wall tank work for your site?
This Captor is built for two jobs in particular: SPCC secondary containment, where the outer wall is your engineered backstop, and bulk fire-water or process-water reservoir service where a closed, contained 10,000-gallon column makes sense. The footprint is 142 x 142 inches with an overall height of 226 inches, so plan the pad and overhead clearance before delivery — at 226 inches tall this is a serious vertical vessel, not a tank you tuck under a low roof. Empty-to-full, the load on your pad changes dramatically: filled with water the contents weigh 83,400 lb, and at the tank's full 1.5 specific gravity rating the contents can reach 125,100 lb. Size the foundation to the heaviest liquid you will actually store, not to water, and confirm the slab and soil bearing with those numbers in hand. The Tank Sizing Calculator and Tank Sizing Guide walk through translating a 10,000-gallon storage target into the freeboard and footprint you can actually use.
Fittings and access
Per the technical drawing on this page, this Captor is configured with a flange, an 18-inch PE threaded and vented fitting, and a manway with 15-inch access. The flange and the 18-inch PE threaded fitting are your two plumbed connection points; the manway is bolted and gasketed, so confirm the gasket material against the liquid you intend to store before you set the tank. The vented threaded fitting matters on a closed vertical tank like this one — venting keeps the tank from pulling a vacuum on drawdown or pressurizing on fill, and on a 142-inch-diameter column the liquid level moves fast, so the elevation of that 18-inch fitting (shown on the drawing) effectively sets your real overflow point and usable height. The 15-inch manway access gives you a path in for inspection and cleaning. Reference the technical drawing on this page for the exact fitting positions and elevations before you plumb it.
Specifying a Captor double wall correctly
The most common mistake on a containment tank is treating the 1.5 specific gravity rating as headroom you do not need and then never checking it against your liquid. The rating is the structural ceiling for this tank: store a liquid denser than 1.5 SG — heavier acids or brines above that mark — and you are outside what this wall section was designed for, and you need a higher-rated Captor rather than this one. Call 866-418-1777 to spec the correct rating before you order. The companion concern is freeboard — a double wall tank still has to leave room for thermal expansion and headspace, which the freeboard sizing guide for Snyder Captor tanks under ASTM D1998 works through in detail, and it ties directly back to that fitting elevation and the height you can actually fill to. If this tank is going into an SPCC-regulated site, the SPCC 40 CFR 112 compliance walkthrough covers how the double wall design maps to your containment plan; for private fire protection, the NFPA 22 fire-water reservoir design guide covers sizing discipline and freeze protection; and the note on HDPE wall thickness at the vapor-saturated headspace explains where these tanks actually wear, which is above the liquid line where routine inspection often misses it.
This Snyder 10,000 gallon black double wall storage tank ships LTL freight from Lincoln, Nebraska, and at this size and weight delivery is by dedicated motor freight quoted live to your ZIP — get your number from the Freight Cost Estimator or call 866-418-1777. List price is shown before freight; freight is quoted separately to your delivery point.
