The Norwesco 4995 Gallon Plastic Water Storage Tank is a vertical polyethylene water storage tank built for high-volume service where you need real capacity without moving to steel or concrete. It stands 88 inches tall on a 142-inch-diameter base, giving you nearly 5,000 gallons of working storage in a single freestanding vessel. If you are sizing a vertical storage tank for a rural water supply, fire reserve, irrigation buffer, or industrial water bank, this is the kind of tank that anchors the system.
Specs at a glance
Capacity is 4995 gallons, height 88 inches, diameter 142 inches, polyethylene construction, footprint 142.0 inches in diameter. It carries a 1.0 specific gravity rating, so it is engineered for water and water-equivalent liquids at that density. Filled to the top, 4995 gallons of water weighs 41,658 pounds, and the tank's maximum rated contents weight matches that figure at 41,658 pounds, so a full fill stays within the design rating. Spread across the 142-inch-diameter base, that full load works out to roughly 2.6 pounds per square inch on your pad. It ships LTL from the Norwesco plant in Fairfield, Texas, which matters before anything else, because at this weight class freight is the dominant variable and origin sets it. Refer to the technical drawing on this page for outlet and fitting placement before you plumb the install.
Will it work for your application
This is a Norwesco vertical water tank rated for a 1.0 specific gravity, which means water and water-equivalent liquids. Plan your foundation around the 41,658-pound full load and the 142-inch-diameter footprint. A flat, fully supported pad is not optional at this size. For step-by-step pad design at this weight, work through our concrete pad sizing guide, which walks the ACI 360R-10 framework and where the ACI 318 boundary kicks in. If you are still settling on capacity, the Tank Sizing Calculator and Tank Sizing Guide help you match storage volume to demand. With 88 inches of vertical height, a bottom outlet sees roughly 3.2 psi of static head at a full fill, so size downstream valves and plumbing for that pressure.
The mistake to avoid, and the fittings gap to close
The single biggest mistake at this scale is treating the 1.0 specific gravity rating as a license to store anything liquid. It is rated for water. Heavier-than-water liquids load the tank wall beyond its design and need a higher-SG vessel, so if your project involves a denser fluid, call us at 866-418-1777 before you order rather than assuming this tank fits. Second: outlet size, fitting count, and placement are not specified in this listing. Read them off the on-page technical drawing or confirm by phone before you buy bulkhead fittings or gaskets, so your plumbing matches the tank you actually receive. If your project is fire-protection storage, our guide to fire-water reservoir design covers NFPA 22 sizing discipline and freeze protection for cold-climate sites, and if you are building a reuse system, the industrial water reuse tank topology guide covers grey-water, rainwater, and condensate aggregation.
Commissioning the install
Once the tank is set and plumbed, fill and pressure-test it before you put it into service. Our hydrostatic test methodology guide covers water-fill discipline, pad-settlement monitoring, fitting leak detection, and hold-time math so you catch a problem at acceptance instead of in service.
This tank ships LTL freight from Fairfield, Texas, and freight is quoted live to your ZIP code. Get a real number for your delivery address with our Freight Cost Estimator, or call us at 866-418-1777 and we will walk you through sizing, freight, and lead time. See the technical drawing on this page for full dimensional detail before you finalize your install.
3 Year Warranty
