The Norwesco 305 Gallon Black Vertical Storage Tank is a 305-gallon polyethylene vertical tank built for above-ground bulk water storage, set on a compact 46 x 46 inch footprint and standing 50 inches tall. The black exterior blocks light to discourage algae growth in stored water, making it a practical pick for rural and remote water reserves, rainwater collection, water hauling, and general-purpose vertical storage where a small ground footprint matters. If you have been searching for a Norwesco vertical storage tank in black, this is the size that fits a tight pad without giving up working capacity.
Quick specs
- Capacity: 305 gallons
- Footprint: 46 x 46 inches; height: 50 inches
- Material: polyethylene, black
- Specific gravity rating: 1.5
- Contents weight: about 2,544 lb full of water (1.0 SG); up to roughly 3,816 lb at the 1.5 SG rating
Will this tank handle your job?
This is a vertical storage tank rated for a specific gravity of 1.5, which means it can carry fluids up to 1.5 times the density of water. That rating widens its use beyond plain water: the same tank stores denser fluids such as liquid feed or various solutions up to 1.5x water density, without stepping up to a heavier-duty tank. Filled with water, the contents weigh about 2,544 pounds; at the full 1.5 SG rating, the contents reach roughly 3,816 pounds, so plan your pad and supports around the higher figure if you ever intend to store anything denser than water. This is a water and general-storage tank; it is not represented here as potable, NSF-certified, or approved for any specific chemical, so confirm the fit for your fluid before you order. The 46 x 46 inch footprint and 50-inch height keep it manageable for tight pads and low-clearance spaces, but verify your access path and pad dimensions against the technical drawing on this page first. Our Tank Sizing Calculator and Tank Sizing Guide help you match capacity, footprint, and weight to your site. For the outlet and lid configuration, check the technical drawing on this page or call 866-418-1777 to confirm fitting sizes before you plumb it in.
How it ships
This Norwesco vertical tank ships LTL freight, quoted live to your ZIP. Norwesco molds this line at multiple plants, so it routes from the nearest stocking location to keep transit short and freight reasonable. Stocking plants include Fairfield, TX; Griffin, GA; Hanford, CA; Owego, NY; Shawnee, OK; Tooele, UT; Washington Court House, OH; and Washougal, WA. Enter your ZIP in the Freight Cost Estimator for a live LTL rate, or call 866-418-1777 and we will route it from the closest plant.
The mistake to avoid
The most common error on a 1.5 SG vertical tank is sizing the pad and tie-downs for water weight alone. A poly tank flexes under load, and a tank rated to 1.5 SG can legitimately hold contents near 3,816 pounds, so design your concrete pad and anchoring for the rated load, not just the water figure. If this tank feeds a private fire-protection reserve, our guide on fire-water reservoir tank design and NFPA 22 sizing walks through reserve sizing and cold-climate freeze protection, and our concrete pad sizing framework covers building a base that carries the full rated weight. Storing reclaimed or harvested water? See our guides on water reuse tank topology and rainwater harvesting and first-flush diverter sizing.
Ready to move on this Norwesco black vertical storage tank? Get your live LTL freight quote with the Freight Cost Estimator or call 866-418-1777 for help sizing, siting, and shipping it to your location.
