The Norwesco 55 Gallon Vertical Liquid Storage Tank (SKU N-41451) is a compact white polyethylene vertical tank built for liquid storage where floor space is tight. It stands 44 inches tall on an 18 x 18 inch footprint, so it tucks into corners, pump sheds, and equipment skids that a wider tank cannot fit. The 1.5 specific gravity rating means the tank wall is engineered to hold liquids up to 1.5 times the weight of water. If you have searched for a Norwesco 55 gallon vertical storage tank, this is that unit.
Will it work for your application?
Capacity is a nominal 55 gallons. Filled with plain water the contents weigh about 459 pounds, and the tank wall is rated to carry up to 688 pounds of liquid. That is the headroom that lets you store heavier-than-water solutions up to a 1.5 specific gravity, and the two numbers are internally consistent: 688 divided by 459 lands right at 1.50 SG. To check YOUR liquid, take its specific gravity, multiply by 459, and confirm the result stays under 688 pounds. Our Tank Sizing Calculator and the Tank Sizing Guide walk you through that math if you are sizing several tanks at once.
Mounting and the footprint
At 44 inches tall on an 18 x 18 inch base, this tank runs a height-to-width ratio of roughly 2.4 to 1, so it carries its load high on a small footprint. A flat, fully supported base matters more here than on a squat tank, and an empty or partially filled unit is more tip-prone than a wide one, especially outdoors in wind. Set it on a level pad sized to the full 18 x 18 inch footprint with no overhang, and strap or anchor it to the pad for outdoor service. For an above-ground install, our guide on concrete pad sizing for above-ground polyethylene tanks covers the pad framework so the tank stays plumb when full. See the technical drawing on this page for the fitting and lid layout on this specific model before you plumb it in; fittings are not pre-installed as a kit, so confirm what you need against that drawing.
The mistake to avoid
The 1.5 specific gravity figure is a weight rating, not a permission slip for every chemical. Polyethylene resists many liquids but not all, and a tank that easily holds your liquid by weight can still be the wrong resin for the chemistry. Confirm both the weight (under 688 pounds) and the chemical fit before filling. If your liquid exceeds 1.5 SG by weight, this is the wrong tank and you should call us to be sized into a higher-rated unit. For fire-reserve or reuse water this tank stores the liquid cleanly; if you are designing a small fire-water reserve, our write-up on fire-water reservoir tank design for rural and remote sites covers freeze protection and reserve sizing.
This tank ships LTL freight from the Norwesco plant in Burnet, Texas, with the rate quoted live to your ZIP code. On a small tank like this, freight can run large relative to the list price, so run your number before you assume it is cheap. Get your quote on the Freight Cost Estimator, or call us at 866-418-1777 and we will quote it for you and help confirm this is the right tank for your liquid.
3 Year Warranty
