The Norwesco 550 Gallon Vertical Liquid Storage Tank (SKU N-40023) is a closed-top polyethylene vertical tank for above-ground bulk water and liquid storage. At 67 inches in diameter and 44 inches tall, it holds 550 gallons in a wide, low-profile footprint that keeps the center of gravity down - a practical advantage on a single pad at wind-exposed rural and remote sites. It carries a 1.5 specific gravity rating, so it is built to hold liquids up to 1.5 times the weight of water at full volume.
Key specifications
- Capacity: 550 gallons
- Diameter: 67 in · Height: 44 in · Footprint: 67 in dia
- Full-water weight: 4,587 lb · Max rated contents weight: 6,880 lb
- Specific gravity rating: 1.5
- Material: polyethylene · Brand: Norwesco · SKU: N-40023
Will it work for your liquid?
Run the load math before you buy. Filled with water this tank carries roughly 4,587 pounds; at its maximum rated contents weight it is built to hold up to 6,880 pounds, which is what the 1.5 specific gravity rating buys you over a water-only design. To check a heavier liquid, divide the 6,880-pound ceiling by 8.34 pounds per gallon and then by the liquid's specific gravity. At SG 1.5 that confirms the full 550 gallons; a lighter liquid leaves headroom, while anything above SG 1.5 means you derate the fill volume to stay under the rated load. The Tank Sizing Calculator and the Tank Sizing Guide walk through that math, and our complete buyer's guide to this tank covers configuration and use-case detail.
Foundation and footprint
That 67-inch diameter sits directly on the ground, so the pad underneath it matters. A full tank concentrates several thousand pounds onto a single circular footprint, and an uneven or undersized base is the most common mistake on vertical tank installs - it stresses the wall and can lead to deformation over time. Our guide to concrete pad sizing for above-ground polyethylene tanks lays out the framework so you build a level, properly sized base the first time.
Common applications and fittings
This is a workhorse vertical storage tank for water and liquid holding. It suits rural and remote water programs - see our guide on fire-water reservoir tank design for rural and remote sites - as well as grey-water, rainwater, and HVAC condensate reuse storage trains. Inlet and outlet fitting sizes and placement are not specified in this listing data, so call us at 866-418-1777 to confirm the exact fitting size, type, and location before you plumb it.
This Norwesco tank ships LTL freight, quoted live to your ZIP code. It is produced at Norwesco plants in Burnet and Fairfield, TX; Griffin, GA; Hanford, CA; Lancaster, OH; Owego, NY; Shawnee, OK; Sheldon, IA; St. Bonifacius, MN; Tooele, UT; and Washougal, WA, and your order ships from the location nearest you to keep freight down. Get a quote with our Freight Cost Estimator, or call 866-418-1777 to confirm the closest plant and lock in your rate.
3 Year Warranty
