The Snyder Industries 1100 Gallon ASTM Black Captor Double Wall Tank (SKU 5470000N51) is a double wall tank with integrated primary and secondary containment, built for operators who need spill containment without pouring a separate concrete berm. Molded from High Density Linear Polyethylene in black, it stands 104" tall on a 76" x 76" footprint, wrapping secondary containment around an 1,100-gallon primary in a compact square base. The black resin blocks light penetration, which discourages algae growth and slows UV degradation on outdoor sites.
Will it work for your site?
The technical drawing for this model shows three penetrations you can plan your plumbing around:
- Flange fitting
- 18" PE threaded and vented fitting
- Manway with 15" access for interior inspection and cleaning
Confirm those fitting locations and elevations against your plan using the technical drawing on this page before you order. The primary tank carries a 1.9 specific gravity rating, so it holds contents substantially heavier than water. Because it is rated to 1.9 SG, this primary also suits denser fluids up to that rating; confirm your fluid's specific gravity and compatibility with Snyder before filling. One point buyers overlook on a threaded and vented penetration: verify the fitting seals and manway gasket are compatible with your stored fluid, not just the tank wall, since the seal is the real failure point.
Sizing and containment planning
Rated capacity is not usable capacity once freeboard is subtracted, so size against usable volume. Our Tank Sizing Calculator and Tank Sizing Guide translate the volume you actually need into the right tank, and our walkthroughs on Captor freeboard sizing per ASTM D1998, SPCC 40 CFR 112 compliance, and wall thickness at the vapor-saturated headspace cover the failure modes most buyers miss.
The mistake to avoid
The most common error on a black double wall tank this size is sizing your foundation and lift equipment for water weight. Full of water, the load is roughly 9,174 lb; at the full 1.9 SG rating the contents can reach about 17,431 lb. Rate your pad and structural support for the actual weight of your stored liquid, not the gallon count.
This double wall tank ships LTL freight from the Snyder plant in Philippi, WV, quoted live to your ZIP. Get an exact number with our Freight Cost Estimator, or call 866-418-1777 to lock in your order and delivery.
