The Norwesco 4995 gallon black vertical storage tank is a polyethylene bulk-storage vessel for high-volume water and liquid storage where a single large footprint beats a cluster of smaller tanks. It carries a 1.5 specific gravity rating, stands 89 inches tall on a 142 x 142 inch footprint, and is molded in black polyethylene to block light, slow algae growth in stored water, and resist UV degradation for a tank that will live outdoors on a pad. If you have been searching for a Norwesco vertical storage tank in this capacity class, this is the unit that holds nearly 5,000 gallons.
Will it hold what you need to store?
Capacity is 4,995 gallons. Filled with water, the tank and contents weigh 41,658 pounds; at the full 1.5 specific gravity rating, the maximum rated contents weight is 62,487 pounds. That works out to roughly 12.5 pounds per gallon at the top of the rating, so before you fill, check the specific gravity of your liquid against that ceiling - water is about 1.0, and the 1.5 rating gives you headroom for heavier liquids and slurries up to that density. Do not exceed the 1.5 rating. Storing a liquid denser than the tank is rated for is the most common and most dangerous mistake on a tank this size, because the wall and fitting stresses scale with the weight of the contents. Our Tank Sizing Calculator and Tank Sizing Guide help you match capacity and weight to your application.
One large tank versus a cluster of small ones
At this capacity, one 4,995 gallon vessel replaces three or four smaller tanks and the manifolding between them. That means one foundation to pour, one set of fittings to plumb, one footprint to permit, and one freight shipment instead of several - a real cost and complexity difference on a project this size. Outlet and bulkhead fitting size and placement are confirmed per order against the technical drawing, so call 866-418-1777 to lock in the configuration your site needs rather than assuming a fitting package is included.
Footprint, foundation, and setup
The 142 x 142 inch footprint at an 89 inch height makes this a wide, relatively low-profile vertical tank - it spreads its load over a large area rather than stacking it tall. At more than 62,000 pounds fully loaded at rating, the foundation under this tank is not an afterthought. A correctly sized, level concrete pad is required for safe long-term service; see our guide on concrete pad sizing for above-ground polyethylene tanks for the engineering framework. For specific fitting locations, outlet placement, and dimensional detail, see the technical drawing on this page.
Common uses and freight
A tank in this size class works for fire-water reserves, bulk water storage, industrial water reuse, and rainwater aggregation. If you are designing a rural or remote fire-water reservoir, our guide on fire-water reservoir tank design covers NFPA 22 sizing discipline and cold-climate freeze protection. For grey-water, rainwater, and HVAC condensate aggregation, see our industrial water reuse tank topology guide, and for rainwater harvesting setups our first-flush diverter sizing guide.
This tank ships LTL freight from the Norwesco plant in Fairfield, Texas, with freight quoted live to your ZIP code. Shipping from Fairfield keeps freight to Texas, Oklahoma, Louisiana, and the broader South Central region shorter than a tank trucked from a northern plant. Get an exact number with our Freight Cost Estimator, or call us at 866-418-1777 to confirm the right tank, foundation requirements, and delivery for your site.
