The Snyder Industries 120 Gallon Vertical Dual Containment Double Wall Tank is a tank-within-a-tank: an inner tank nested inside an outer containment wall, so a leak from the inner tank is captured by the outer wall instead of reaching your pad. It is built with a sulfuric-acid resin and carries a 1.9 specific-gravity rating, which is why it suits aggressive, dense liquids that weigh nearly twice as much as water.
Spec snapshot
Capacity 120 gallons · Footprint 31 x 31 in · Height 52 in · Specific-gravity rating 1.9 · Resin: sulfuric-acid · Material: White High Density Linear Polyethylene · Ships from Marked Tree, AR. As a double wall tank, this is a vertical tank with built-in containment, so you do not need a separate dike to capture a spill.
Will this double wall tank work for your liquid?
Match your chemical's density to the tank, not the other way around. Filled with water this Snyder containment tank carries about 1,001 pounds; rated to its full 1.9 specific gravity it is built to hold up to 1,902 pounds of contents. That 1,902 lb ceiling - not the 120-gallon mark - is the real fill limit for any liquid heavier than water: a 1.9 specific-gravity liquid hits the weight ceiling well before the tank looks full, so plan your working level around the weight, not the volume line. If your liquid sits at or below 1.9 specific gravity, the structure is sized for it. The 31 by 31 inch footprint and 52 inch height let it tuck into tight equipment rooms and process corners where a wider single-wall tank with a separate dike would not fit. Confirm your contents' specific gravity, chemical compatibility, and operating temperature against the resin before you commit.
The mistake to avoid
The big one with a dual containment tank is treating it like a plain vertical tank. This is a 1.9 specific-gravity, sulfuric-acid-resin shell in High Density Linear Polyethylene, and its value lives in the contained outer wall plus that density rating. Do not exceed the 1.9 specific gravity, and size for the usable volume rather than the gross 120 gallons - double-wall tanks need freeboard for thermal expansion and a true working level below the top. Fitting and gasket materials are configured to your chemical, so confirm them by phone before you order rather than assuming a default. Our Snyder Captor double-wall freeboard sizing guide walks through ASTM D1998 freeboard and the real volume you can actually use, and the Tank Sizing Calculator and Tank Sizing Guide help you land on the right capacity before you order.
Compliance and pad work
If this tank is going into a spill-prevention program, the Snyder Captor double-wall SPCC 40 CFR 112 walkthrough shows how an integral containment tank fits the rule. Because you are carrying up to roughly 1,902 pounds of contents on a 31 by 31 inch footprint, the slab matters: the concrete pad sizing guide lays out the ACI 360R-10 framework and the ACI 318 boundary for above-ground polyethylene tanks.
This Snyder vertical containment tank ships LTL freight from the Snyder plant in Marked Tree, Arkansas, quoted live to your ZIP. Get a number in seconds with the Freight Cost Estimator, or call 866-418-1777 to confirm fitting and gasket materials, lead time, and the right tank for your chemical before you buy.
