305 Gallon Vertical Liquid Storage Tank

The Norwesco 305 Gallon Vertical Liquid Storage Tank (SKU N-40302) is a polyethylene vertical storage tank that stands 50 inches tall on a 46-inch-diameter footprint and holds 305 gallons. It carries a 1.5 specific-gravity rating, which for water storage means you have ample density headroom and a tank engineered to carry a heavier-than-water load when you need it.

Will it work for your site?

Start with weight, because that is what most buyers underestimate. Filled with water, the contents weigh about 2,544 pounds. The 1.5 specific-gravity rating means the tank is built for liquids up to 1.5 times the density of water, so the maximum rated contents weight climbs to roughly 3,816 pounds. The tank itself arrives empty and is light enough to set in place by hand; you only need offload or lift equipment once it is filled. For the shipping tare weight, see the technical drawing on this page. Run the full and rated weights through the Tank Sizing Calculator if you want to confirm the math for a partial fill or a denser liquid.

Pad and placement

A vertical tank carries its full weight on a small footprint, so the pad underneath it does real work. At roughly 3,816 pounds fully loaded with a 1.5-SG liquid, this tank needs a level, continuously supported base. Take the 46-inch diameter and 50-inch height to the pad step: the pad should extend past the 46-inch base so the tank is fully supported, not overhanging an edge. Our concrete pad sizing guide walks through the ACI framework for above-ground polyethylene tanks, and the 305-gallon buyer's guide covers the rest of the selection decision. For fire-reserve, rainwater, or reuse duty, the fire-water reservoir design guide and the water reuse topology guide are worth a read.

The mistake to avoid

Do not assume the 1.5 specific-gravity rating gives you unlimited headroom on density. For straight water storage at 2,544 pounds full, you have margin. If you are moving to anything heavier than water, verify the specific gravity of your actual liquid against the 1.5 rating before you fill, and push toward the 3,816-pound ceiling only with a liquid you have confirmed.

This Norwesco vertical storage tank ships LTL freight, quoted live to your ZIP from the nearest plant. At 46 inches in diameter and 50 inches tall it ships upright within a standard pallet footprint, so it does not require oversize or flatbed handling. Norwesco builds this model at Fairfield, TX; Griffin, GA; Hanford, CA; Lancaster, OH; Owego, NY; Shawnee, OK; Tooele, UT; Washougal, WA, and additional regional facilities, so most regions ship from a plant close to you. Get a freight estimate with the Freight Cost Estimator, confirm your sizing with the Tank Sizing Guide, or call 866-418-1777 to talk through placement and delivery.

3 Year Warranty