The Norwesco 5000 Gallon Black Heavy Duty Vertical Storage Tank (SKU 43833B) is a freestanding polyethylene vertical storage tank built for high-volume water work where the contents stay heavy and the column stays tall. It holds 5,000 gallons in a single 141-inch-diameter footprint at 86 inches tall, and the black resin cuts light penetration to slow algae growth in outdoor water service. It carries a 1.9 specific gravity rating, which is the number that sets this tank apart from a plain-water vertical: the wall is engineered for dense contents well beyond water, so you get real headroom instead of running at the edge of the rating.
Will it work for your site?
Start with the pad. The base measures 141 x 141 inches - call it a 12-foot-square slab - and it has to be flat, level, and fully supporting across that whole footprint, not just under the tank diameter. Filled with water the tank carries roughly 41,700 lb; the wall is rated to a maximum contents weight of 79,230 lb at its 1.9 specific gravity. That is about 37,500 lb of margin over plain water, which is what lets this Norwesco vertical storage tank hold denser-than-water contents - brine and similar fluids - up to the 1.9 rating without stepping up to a heavier-wall tank. Run your site numbers through our Tank Sizing Calculator and the Tank Sizing Guide before you pour anything, and review concrete pad sizing for above-ground polyethylene tanks for the ACI framework behind a slab that won't crack under this load.
Included top fittings and access
This tank ships with a 22-inch lid (the "tuna can" style) and a revised manway sized for that 22-inch lid, shown on the technical drawing on this page. Those are the supplied top fittings, so confirm the lid and manway placement against your fill, vent, and inspection plan before install. Any outlet or bulkhead fitting you add yourself should be checked against the technical drawing for size and location - and remember the gasket, not the poly wall, is usually where a field-added fitting leaks. Use a gasket rated for poly-tank service and for the fluid you are storing so you size and seal your plumbing correctly the first time.
Common sizing mistake to avoid
The mistake on a tank this size is reading the 1.9 specific gravity rating as permission to fill it with anything heavy without checking the chemistry. The 1.9 number is a wall-strength margin; it does not by itself make this a chemical tank. For water and similar low-density contents this Norwesco tank is well within rating, but if you are storing anything denser than water, confirm the contents' specific gravity stays under 1.9 and that the resin suits the fluid before you commit. The other common miss is under-building the pad: with about 41,700 lb of water alone, any settling or soft spot under that 141-inch base shows up fast.
This tank ships LTL freight from the Hanford, CA plant, and freight is quoted live to your ZIP - it is not included in the list price. Because the tank originates in central California, an East Coast destination is a long haul, so pull a real number with our Freight Cost Estimator or call 866-418-1777 and we'll quote it for you. If this 5,000-gallon storage tank is headed for fire-protection service at a rural or remote site, the fire-water reservoir tank design guide walks the NFPA 22 sizing discipline, and if you are aggregating grey water or rainwater, see our industrial water reuse tank topology guide.
