The Snyder Industries 1000 Gallon Sodium Hypochlorite (UV) Double Wall Tank (SKU 5990102N52) is a tank-within-a-tank built for containment: a primary vessel nested inside an outer wall so a leak in the inner tank is caught rather than released to the ground. It is purpose-built for sodium hypochlorite service, molded in opaque white HDLPE (resin #880059) with UV stabilization for outdoor exposure. It holds 1,000 gallons, stands 69 inches tall on an 81 x 81 inch square footprint, and carries a 1.9 specific gravity wall rating, which is what lets this double wall unit hold contents up to a maximum rated 15,846 pounds rather than water alone.
Will it work for your site?
Start with weight and footprint, because a double wall tank of this size commits your pad and your rigging. Filled with water the contents weigh about 8,340 pounds; at the full 1.9 SG rating the contents alone can reach 15,846 pounds, and that upper figure is what your concrete pad and forklift have to answer to. The 81 x 81 inch base is square, so plan the pad and any containment curb around that dimension plus clearance for fittings and for inspecting the interstitial space between the walls. Confirm the exact fitting layout, outlet size, and vent locations against the technical drawing on this page before you finalize plumbing, and confirm the fitting and gasket elastomer are rated for sodium hypochlorite service with our team at 866-418-1777, since fitting and seal materials matter as much as the tank wall on a chemical this aggressive.
Sizing the pad and the pour
Because the loaded weight is high, the foundation is the part most people underbuild. Our Tank Sizing Calculator and Tank Sizing Guide help you match this 1000 gallon double wall tank to your draw and refill cycle, and the guide on concrete pad sizing for above-ground polyethylene tanks walks the ACI 360R-10 framework and the ACI 318 boundary so the slab actually carries the rated load. For usable-volume and freeboard math on Snyder Captor-style double wall units, see our writeup on double-wall freeboard sizing per ASTM D1998.
The mistake to avoid
The costly mistake here is sizing your pad and rigging to the water weight instead of the loaded weight of the fluid you actually store. The 1.9 SG rating gives you real margin over water, but the pad, curb, and lift plan have to answer to the filled weight, not the empty tank. The double wall design only earns its keep if the outer wall and the interstitial space stay clear and inspectable, so leave room around the base for that. If this tank is going into a regulated secondary-containment role, the SPCC 40 CFR 112 compliance walkthrough covers exactly what an inspector expects from the containment and the interstitial monitoring.
This 1000 gallon Snyder double wall tank ships LTL, quoted live to your ZIP from the nearest stocking plant: Chowchilla, CA or Lincoln, NE. Run your delivery number on the Freight Cost Estimator or call 866-418-1777 and we will route it from the closest point and confirm offload requirements for a tank this heavy.
