The Norwesco 1100 Gallon Dark Green Vertical Water Storage Tank is a polyethylene vertical water tank built for bulk above-ground storage on farms, rural homesites, and remote properties. It holds 1,100 gallons in an 87-inch-diameter round body that stands 53 inches tall, so it tucks under low eaves, inside outbuildings, and on covered pads where a taller cylinder would not fit. The dark green color reduces light transmission through the tank wall, and the squat profile keeps the center of gravity low once filled. This is the kind of vertical storage tank people search for when they need real water-storage capacity without a tower-height silhouette.
Will it work for your site?
Sizing starts with weight, not just gallons. Filled to capacity with water, this tank carries 9,174 pounds of contents, which is its maximum rated contents weight at the 1.0 specific gravity it is built for. That load has to land on a pad that can take it. A flat, level, fully supported base is not optional at this size: an 87-inch-diameter footprint must sit on a continuous, settlement-free surface, because polyethylene tanks transfer their entire load straight down through the floor. Run your numbers through the Tank Sizing Calculator and read the Tank Sizing Guide before you pour anything, and use our concrete pad sizing guide to match the slab to the load. Confirm the diameter against the technical drawing on this page before you set forms.
The mistake to avoid
This tank is rated for a specific gravity of 1.0, which means water and water-like liquids only. Specific gravity is the single most common sizing error at this capacity: the rating tells you the maximum density of liquid the wall is engineered to hold, and 1.0 is fresh water. Do not put a heavier-than-water liquid in a 1.0-rated water tank, because the wall is not designed for that load. Keep it to water service and you stay inside the design envelope. After install, do not skip a controlled fill test before you commission it. Our hydrostatic test methodology guide walks through fill discipline, pad-settlement monitoring, and fitting leak checks so you catch problems while the tank is empty enough to drain.
Built for water-supply duty
At 1,100 gallons this size sits in the sweet spot for rural water supply, hauled-water buffering, and on-site reserve. If you are building a private fire-protection reserve, our fire-water reservoir design guide covers NFPA 22 sizing discipline and freeze protection for cold-climate service. For water-reuse projects pulling from grey-water, rainwater, or HVAC condensate, the industrial water-reuse topology guide shows how a tank this size fits into a quality-banded storage train.
This tank ships LTL freight, quoted live to your ZIP. We ship it from the nearest stocking Norwesco plant in our network among Fairfield, TX; Griffin, GA; Hanford, CA; Lancaster, OH; Owego, NY; Shawnee, OK; Tooele, UT; and Washougal, WA, so the freight leg stays as short as the network allows. Get an exact number from our Freight Cost Estimator or call 866-418-1777 and we will quote it to your delivery ZIP. See the technical drawing on this page for fitting locations and full dimensions before you set your plumbing.
