The Norwesco 11000 Gallon Dark Green Vertical Water Storage Tank holds 11,000 gallons in a 144-inch diameter footprint standing 167 inches tall, built from polyethylene and rated to a 1.0 specific gravity. That rating means it is engineered for water and water-density liquids at the full 11,000-gallon fill. For rural fire-water reserves, agricultural supply, and large-scale water storage, this is the kind of vertical storage tank that consolidates what would otherwise be a bank of smaller tanks into a single vessel.
Will it work for your site?
The numbers that drive site planning are clear. Diameter is 144 inches (12 ft), giving a 144.0 x 144.0 inch footprint; overall height is 167 inches, just under 14 feet. That overall height is the figure that catches buyers off guard, so account for crane reach, building clearance, and transport-route height before delivery. Capacity is 11,000 gallons of dark green polyethylene, and the dark green color limits light penetration into the stored water. The 1.0 specific gravity rating is matched to water: this tank is for water and liquids at or below water density only. Storing anything denser, such as many liquid fertilizers, brines, or chemicals, exceeds the structural rating and is not what this tank is built for. Use the Tank Sizing Calculator and the Tank Sizing Guide to confirm 11,000 gallons matches your demand profile and drawdown needs before you commit.
Foundation and install discipline
At full water weight this tank carries 91,740 pounds of contents, so the pad and the soil beneath it have to be engineered for that load. The single most common mistake on a tank this size is under-building the foundation: the slab must support the full 91,740-pound contents weight evenly, with no point loading and no settlement that throws the tank out of plumb. Review our guide on concrete pad sizing for above-ground polyethylene tanks within the ACI 360R-10 framework before you pour. Once the tank is set and plumbed, follow a disciplined first fill using our hydrostatic test methodology for new-install tank acceptance so you can monitor pad settlement and catch any fitting leak before the tank goes into service. Fitting and outlet configuration is shown on the technical drawing on this page; confirm it before you finalize plumbing, and ask us for dry tank weight when you plan your offload equipment.
Where this tank fits
An 11,000-gallon reservoir suits private fire-protection storage on rural and remote sites; if that is your application, our guide to fire-water reservoir tank design under NFPA 22 sizing discipline covers reserve sizing and cold-climate freeze protection. For sites aggregating grey-water, rainwater, or HVAC condensate into a quality-banded storage train, our write-up on industrial water reuse tank topology shows how a vertical water tank of this scale anchors a reuse-capable bulk storage architecture.
This tank ships LTL freight from the Norwesco plant in Albertville, Alabama, with freight quoted live to your ZIP code. Because it ships from a single plant as an oversize, over-height move, get a ZIP quote before you purchase using our Freight Cost Estimator, or call 866-418-1777 and we will work the freight and logistics for a tank this size with you directly.
