The Snyder Industries 1000 Gallon Double Wall Tank (SKU 5990102N30) is a containment-rated polyethylene tank built for demanding storage where a secondary wall is required. It holds 1,000 gallons in an 81" x 81" footprint and stands 69" tall, molded from HDLPE #880046 in an opaque white shell. The specific gravity rating is 1.9, which is the number that matters most on this tank: it tells you how dense a liquid the primary wall is engineered to carry.
Will it work for your liquid?
The 1.9 specific gravity rating means the primary tank is built to hold contents substantially heavier than water, and 1.9 is the ceiling of the primary wall, not a starting point. Full of water alone the load is about 8,340 lb; at the maximum rated 1.9 density it carries up to 15,846 lb. Size your foundation to your liquid's actual specific gravity rather than defaulting to the full 15,846 lb, and confirm chemical compatibility for your specific service against Snyder's chemical-resistance chart, since that data is concentration- and temperature-specific. The tank comes fitted with an 18" PE threaded and vented opening plus a manway with 15" access for entry and cleanout; see the technical drawing on this page for exact fitting placement. Confirm the 18" PE fitting and the 15"-access manway gasket materials are rated for your chemical and concentration too, since the wetted fittings and gaskets are the usual leak point long before the poly wall is. If you are sizing for usable volume versus total capacity, run the numbers through our Tank Sizing Calculator and the Tank Sizing Guide.
Double wall containment and monitoring
The double wall design provides built-in secondary containment, which is central to SPCC and general spill-control planning. Buying double-wall over a single-wall tank plus a dike only pays off if you inspect and monitor the annular space between the walls for a primary-wall breach, so build that into your operating routine. Because a double-wall tank must be sized with proper freeboard for thermal expansion and contents density, read our walkthroughs on Captor double-wall freeboard sizing per ASTM D1998 and Captor double-wall tanks for SPCC 40 CFR 112 compliance before you finalize the install.
The mistake to avoid
The common error on a double-wall tank is treating the 1.9 rating as a chemical clearance. It is a density rating, not a compatibility approval. Verify both the specific gravity and the resin's resistance to your exact chemical and concentration first, and size the site before ordering: this tank needs roughly a 6.8 ft square pad plus door and roof clearance for a 69"-tall shell, sized for the loaded weight using our concrete pad sizing guide and the ACI framework.
This 1000 gallon double wall tank ships LTL, quoted live to your ZIP from the nearest Snyder plant that stocks it: Chowchilla, CA or Lincoln, NE. Get your rate in seconds with the Freight Cost Estimator, or call 866-418-1777 to talk through fittings, containment sizing, and delivery.
