The Norwesco 20000 Gallon Black Heavy Duty Vertical Storage Tank (SKU 44334) is a large-volume polyethylene reservoir: roughly 20 feet tall (242 inches) on a 165 by 165 inch footprint, or about a 13.75-foot square, molded in black polyethylene with a 1.9 specific gravity rating. That high SG rating is the headline spec here. Where a standard 1.0 or 1.5 SG tank is limited to lighter contents, this one is rated to hold liquids up to 1.9 times the weight of water, which is why its maximum rated contents weight reaches 316,920 lb against 166,800 lb full of plain water. For bulk water storage, fire-water reservoirs, and large-volume industrial water service, that gives a wide working margin.
Will it work for your site?
Full of water this Norwesco vertical storage tank holds 20,000 gallons and weighs roughly 166,800 lb, so plan the 165.0 x 165.0 inch (about 13.75-foot square) footprint and the 20-foot height into your site layout and overhead clearance. A tank of this mass demands a properly engineered foundation, not bare soil or gravel. Walk through the load and slab logic in our guide to concrete pad sizing for above-ground polyethylene tanks before you set it. If you are still settling on capacity, the Tank Sizing Calculator and Tank Sizing Guide help you match volume, footprint, and weight to the space you have. Fitting and outlet configuration is not specified in this listing data, so confirm port sizes and placement by phone at 866-418-1777 before you order to make sure fill and draw match your plumbing.
How will it ship?
A 20,000 gallon vertical tank ships LTL, quoted live to your ZIP code; freight on a unit this size is a real line item, so it pays to plan the delivery and offload well in advance. This SKU is produced at three Norwesco plants, in Albertville, AL, St. Bonifacius, MN, and Washington Court House, OH, and freight is typically quoted from the plant serving your region to keep the haul short. Run your delivery ZIP through the Freight Cost Estimator for a live quote, or call 866-418-1777 to coordinate the delivery and offload of a tank this large.
The mistake to avoid
The biggest error on a tank this size is treating the 1.9 specific gravity rating as a license to skip foundation work, or assuming a heavier-than-water liquid behaves like water. At 316,920 lb of maximum rated contents, the structural demand on the pad nearly doubles the full-water figure, so the foundation has to be sized to the actual liquid you intend to store, not to water. The second common miss is overlooking freeze and design considerations for large outdoor reservoirs in cold climates; if this is fire-water or remote-site storage, our fire-water reservoir tank design guide covers NFPA 22 sizing and freeze protection for cold-climate service. For sites aggregating multiple sources, the industrial water reuse tank topology guide walks through grey-water, rainwater, and condensate storage trains at this scale.
Ready to spec this Norwesco 20,000 gallon black vertical storage tank for your project? Get a live freight quote to your ZIP with the Freight Cost Estimator, or call our team at 866-418-1777 to confirm fitting configuration, foundation requirements, and delivery logistics before you order.
