The Norwesco 120 Gallon Vertical Water Storage Tank (SKU N-43858-C) is a black polyethylene vertical storage tank built for general water storage where you need real capacity in a compact footprint. It stands 31 inches tall on a 38 x 38 inch base, so it tucks into corners, sheds, equipment rooms, and trailer beds that taller verticals won't clear. The black resin blocks light to discourage algae growth in standing water, which makes it a practical pick for a water storage tank that sits between uses.
Will it work for your job?
This is a 120 gallon vertical storage tank with a 38 x 38 inch footprint and a 31 inch height. Filled with water it carries roughly 1,001 pounds of contents, and the tank is rated to hold up to 1,101 pounds total, which gives you headroom for water and dissolved solids without crowding the rating. It carries a 1.1 specific gravity rating, meaning it is engineered for fluids up to 10 percent heavier than plain water; for straightforward water storage that rating sits comfortably above what you need. Review the technical drawing on this page for the fitting layout and exact port locations before you plumb your inlet and outlet, and check the dimensions against your pad, doorway, or trailer clearance.
Sizing and pad planning
That 1,001 pound full weight is the number that drives your foundation. A flat, fully supported base is essential under any polyethylene water storage tank this size, since the load concentrates straight down through the 38 x 38 inch footprint. If you are pouring a slab, our Concrete Pad Sizing for Above-Ground Polyethylene Tanks guide walks the ACI 360R-10 framework for getting it right. To confirm 120 gallons is the correct vertical storage tank size for your draw rate and refill cycle, run the numbers through our Tank Sizing Calculator or read the Tank Sizing Guide. On new installs, our Hydrostatic Test Methodology guide covers the water-fill acceptance procedure, pad settlement monitoring, and fitting leak checks that catch problems before the tank goes into service.
Common uses and the mistake to avoid
A compact black vertical works well for potable and non-potable household storage, irrigation and equipment fill, rural standby supply, and harvested-water duty. If you are sizing a private fire-protection reserve, our Fire-Water Reservoir Tank Design guide covers NFPA 22 sizing discipline and cold-climate freeze protection, and for grey-water, rainwater, or HVAC condensate aggregation our Industrial Water Reuse Tank Topology guide maps quality-banded storage trains. The common error on a tank this size is treating it as a chemical tank because it shares the vertical shape. The 1.1 specific gravity rating is sized for water and light water-based fluids, not for heavier or aggressive chemistry; match the contents to the rating, and confirm any fitting and gasket materials suit your fluid before filling. The second mistake is skipping the pad: setting a 1,000-plus pound water load on uneven or partially supported ground stresses the tank wall and shortens its life.
This Norwesco vertical water storage tank ships LTL freight, quoted live to your ZIP from the nearest Norwesco plant among Fairfield, TX; Griffin, GA; Hanford, CA; Owego, NY; and Shawnee, OK. Because we quote from the closest of those five plants rather than a single dock, your freight number reflects the shortest lane to your site. Get that number in seconds with our Freight Cost Estimator, or call 866-418-1777 and we will quote it for you and help you confirm fitting and pad details before you order.
