The Snyder Industries 550 Gallon Captor is a black, double-wall crosslinked polyethylene (XLPE) tank built to ASTM standards, with the primary tank nested inside an integral secondary containment shell. It holds 550 gallons nominal, stands 65 inches tall on a 76 x 76 inch square footprint, and carries a 1.9 specific gravity rating - meaning the wall is engineered for dense contents well beyond water. The self-contained outer wall provides the secondary containment volume that spill-prevention plans call for, without pouring a separate concrete dike.
Will it work for your site
Filled with water, expect roughly 4,587 lb sitting on that 76 x 76 inch base, so plan a level, engineered pad rated for the load. At its full 1.9 SG rating the tank is built to carry up to about 8,715 lb of contents - about 4,128 lb of payload headroom over water. That envelope means the same unit can hold brine, liquid fertilizer, or other heavier-than-water fluid up to 1.9 SG rather than forcing you into a larger model. Confirm your product's specific gravity against the 1.9 rating before you fill; sizing to actual liquid weight, not gallons alone, is where most pad and stand problems start. Note too that the 550 gallons is nominal - ASTM D1998 freeboard plus thermal expansion reduce the volume you can actually fill, so set your fill line with our Tank Sizing Calculator and Tank Sizing Guide to order once.
Fittings, access, and monitoring
The tank comes configured with a flange fitting, an 18-inch PE threaded and vented fitting, and a manway with 15-inch access for interior inspection and cleaning. Verify the fitting layout, elevations, gasket material, and bolt-up hardware against the technical drawing on this page before you set piping, and match seal materials to the stored fluid - the listed fittings alone do not guarantee compatibility. Because this is a Captor double-wall build, the annular interstitial space between the two walls is the space you monitor for primary-tank leaks, visually or with a sensor. That is the concrete SPCC and 40 CFR 112 benefit an integrated double-wall unit delivers.
Why buyers choose double wall
For secondary-containment work, an integrated double-wall XLPE tank removes the cost and footprint of a separate berm while giving you one black unit. If you are sizing for regulated storage or fire-water reserve, our guides on Captor double-wall tanks for SPCC 40 CFR 112 and Captor freeboard sizing per ASTM D1998 cover the real usable volume and thermal-expansion math behind the rating. Cold-climate and rural planners should also read our fire-water reservoir design guide.
This tank ships LTL from Snyder's plant in Philippi, WV, with freight quoted live to your ZIP. Get a number in seconds with our Freight Cost Estimator or call 866-418-1777 and we will build the quote with you. Confirm delivery access for an LTL truck and plan for offloading a tank of this size before it arrives.
