The Snyder Industries 4000 Gallon Sodium Hypochlorite Double Wall Tank is a UV-service secondary containment tank built to store aggressive, high-density contents without a separate berm. It stands 178 inches tall on a 102 by 102 inch footprint, molded in Opaque White HDLPE resin (#880059) and rated to a 1.9 specific gravity. That 1.9 rating is the number that matters here: the wall is engineered for liquids far heavier than water, which is exactly what a sodium hypochlorite (bleach) storage program demands.
Will it hold what you need it to hold?
At 4000 gallons, plain water fills this double wall tank to roughly 33,360 pounds. Because the shell is rated to 1.9 SG, the maximum rated contents weight climbs to about 63,384 pounds, giving you real headroom for dense solutions instead of a wall already at its limit. The inner storage tank sits inside an integral outer containment shell, so a breach in the primary is caught by the secondary rather than reaching your pad. Use the Tank Sizing Calculator and the Tank Sizing Guide to confirm the working volume and freeboard you actually get once thermal expansion is accounted for.
Fittings, access, and the vented lid
The tank is configured with a flange fitting, an 18-inch polyethylene threaded lid that is vented to relieve the off-gassing inherent to sodium hypochlorite service, and a manway with a 15-inch access port for inspecting and cleaning the inner tank. Confirm every fitting size and port location against the technical drawing on this page before you order valves, bulkhead fittings, or plumbing. Sodium hypochlorite is hard on standard elastomers, so verify gasket and bulkhead hardware are rated for your specific concentration before the tank goes into service. For containment sizing and regulatory context on a Snyder Captor-style double wall, read the Captor freeboard sizing guide and the SPCC 40 CFR 112 walkthrough.
Set it on the right base
At 178 inches tall and a fully loaded weight above 63,000 pounds, this is a tall load that concentrates significant bearing across its 102 by 102 inch base. The pad should extend beyond the tank footprint for edge support; review the concrete pad sizing framework before pouring.
This double wall tank ships LTL from Snyder's plant in Lincoln, NE. Freight is quoted live to your ZIP rather than bundled into the list price, so run your address through the Freight Cost Estimator for a rate, or call 866-418-1777 to lock in a shipment and confirm fittings for your sodium hypochlorite application.
