The Norwesco 265 Gallon Heavy Duty Vertical Storage Tank ships with no outlet fitting installed, which makes it a clean starting point when you want to spec your own bulkhead and plumbing to match a pump, fill line, or drain layout. Rated working capacity is 250 gallons; the "265" in the name is the nominal mold size, and every spec on this page is built around the 250-gallon working volume. It stands in a compact 30-inch diameter footprint, is molded from High Density Polyethylene, and carries an 8-inch lid for filling and access.
Key dimensions at a glance
30 in dia x 89 in H, 8 in lid, 69 lb empty. At just 69 pounds unloaded, one or two people can position it on a prepared pad before plumbing. These dimensions match the technical drawing on this page, so you can confirm clearances against your site before it arrives.
Will it work for your liquid?
This is a heavy-duty vertical tank rated to a 1.5 specific gravity, meaning it is built to hold liquids up to 1.5 times the weight of water without exceeding its design. Filled with water at 250 gallons you are looking at roughly 2,085 pounds of contents; at the full 1.5 SG rating the tank is engineered to carry up to about 3,128 pounds. Use that number as your ceiling: confirm your liquid's specific gravity stays at or under 1.5 before you commit. Maximum service temperature is 120°F / 48°C, and the resin itself carries FDA approval for the material. Because it ships without a fitting, plan your outlet and gasket selection as part of the install rather than assuming a bung is already in place. If you are still sizing, the Tank Sizing Calculator and Tank Sizing Guide help you match gallons to footprint and rated weight to your pad.
Set it up right
A vertical poly tank this tall needs a level, fully supporting base sized for the loaded weight; our guide on concrete pad sizing for above-ground polyethylene tanks walks through the framework. If this is going into fire-water or reserve duty, the fire-water reservoir design guide covers NFPA 22 sizing and freeze protection. For grey-water or rainwater aggregation, see our water reuse tank topology breakdown. New installs should be pressure-checked with water before service using our hydrostatic test methodology.
The mistake to avoid
The biggest miss on this model is treating it as plumbed out of the box. This is the no-fitting configuration: no outlet, no bulkhead. Choose your fitting size and gasket material for your liquid, and do not exceed the 1.5 SG rating or the 120°F temperature limit. Overloading a poly tank past its rated specific gravity is the fastest way to shorten its life.
This 250 gallon Norwesco vertical storage tank ships LTL freight from our Texas plant, quoted live to your ZIP. Get your number with the Freight Cost Estimator or call 866-418-1777 for help matching a bulkhead fitting and confirming your specific gravity before you order.
