The Snyder Industries 3500 Gallon Sodium Hypochlorite (UV) Captor Double Wall Tank is a 3,500-gallon double-wall containment tank molded in opaque white HDLPE (resin #880059) and rated to a 1.9 specific gravity. It stands 158 inches tall on a 102 by 102 inch footprint, so the primary vessel and its integral secondary containment shell sit within one square base rather than requiring a separate dike. As the name signals, this Captor is configured for sodium hypochlorite (bleach) service, and the "UV" designation means UV-inhibited resin built to resist sunlight degradation on above-ground installs — the right specification for outdoor hypochlorite storage.
Will it hold your load
Filled with water this double wall tank carries roughly 29,190 pounds; at its maximum rated 1.9 SG contents it is engineered to hold up to 55,461 pounds. That 1.9 rating is the ceiling spec, and it matters: sodium hypochlorite typically runs near 1.2 SG at common concentrations, so the wall is rated well above the density you will actually store. Treat that as durability headroom rather than a license to run heavier fluid. Plan the pad and anchoring around the loaded weight — run your intended fill level and product density through the Tank Sizing Calculator, and use the Tank Sizing Guide for usable volume versus required freeboard. For freeboard and thermal-expansion specifics on this exact family, see our Captor freeboard sizing walkthrough per ASTM D1998.
Fittings and access
Per the technical drawing on this page, the tank is configured with a flange, an 18-inch PE threaded and vented fitting, and a manway with 15-inch access for inspection and maintenance of the inner vessel. Confirm the fitting elevations and outlet orientation against the drawing before you set the tank, since the vented fitting placement drives your venting and fill plumbing. Because hypochlorite is aggressive to many elastomers, verify that every gasket and seal at these fittings is rated for hypochlorite service before install.
Compliance planning
Double-wall Captor tanks are commonly deployed where secondary containment is a regulatory requirement. If your site falls under SPCC rules, our Captor SPCC 40 CFR 112 compliance walkthrough covers how the built-in containment shell maps to the standard, and the concrete pad sizing guide covers foundation design for a tank of this weight.
This tank typically ships LTL freight from Snyder's Lincoln, NE plant, quoted live to your ZIP; East-Coast orders may route from an alternate Snyder facility, so confirm your origin when you quote. Get a freight number with the Freight Cost Estimator, or call 866-418-1777 to confirm fittings and lead time before you order.
