The Chem-Tainer 300 Gallon Plastic Vertical Liquid Storage Tank (SKU TC3587IC) is a white polyethylene vertical tank built for liquid storage where floor space is tight and capacity matters. It stands 87 inches tall on a compact 35 x 35 inch footprint, so 300 gallons of working volume sits on about 8.5 square feet of floor. If you have searched for a 300 gallon vertical tank or a 300 gallon storage tank to stage water, this is the size and shape most rural water and process-feed setups land on.
Will it work for your liquid?
This tank carries a 1.5 specific gravity rating, which tells you how dense a liquid it is engineered to hold at full volume. Plain water has a specific gravity of 1.0, so for water service you have substantial structural headroom. Filled with water, the tank holds roughly 2,502 pounds of contents; at its maximum rated 1.5 specific gravity it is built to carry up to 3,753 pounds. Already specced at 1.5 specific gravity, this tank carries denser liquids without stepping up to a heavier-wall SKU, so you are buying structural headroom you would otherwise pay extra for. Use those weight numbers when you plan the pad or platform underneath it - a filled vertical tank concentrates real load on a small footprint, and the base needs to be level, fully supported, and rated for the loaded figure, not the empty shell. The Tank Sizing Calculator and Tank Sizing Guide help you confirm 300 gallons is the right working volume before you commit.
Specs and configuration
Dimensions are 87 inches high by 35 inches in diameter, in standard white polyethylene, on a 35 x 35 inch footprint. Fitting, gasket, and outlet materials are configured per order and are not fixed on this listing, so confirm the bulkhead, vent, and outlet layout you need before purchase. For the exact port locations and base detail, see the technical drawing on this page. White is the standard color here; if your liquid is light-sensitive, factor that into where you site the tank.
The mistake to avoid
The most common error on a tank this tall and narrow is underbuilding the foundation. An 87-inch column of liquid on a 35-inch base puts its full weight on a small area, so a soft, sloped, or partially supported pad invites stress cracking at the base over time. Set it on a continuous, level, load-rated surface sized for the loaded weight. Second: the 1.5 specific gravity rating is a structural ceiling, not an invitation to put any chemical in it. For any liquid beyond water, confirm both the polyethylene resin AND the specific gasket and bulkhead elastomer you order against your chemical before filling. This tank is configured here for water and general liquid storage.
This tank ships LTL freight from the plant in Marked Tree, AR, with freight quoted live to your ZIP. Because it ships from northeast Arkansas, your delivered freight depends on your distance from that plant, so pull a live number before you budget - get it from the Freight Cost Estimator or call 866-418-1777. For a deeper look at this exact size, see our 300 Gallon Vertical Liquid Storage Tank buyer's guide, and if you are weighing brands at scale, the Snyder vs Norwesco vs Chem-Tainer vertical tank comparison. Planning a fire-water reserve? Our fire-water reservoir design guide walks through NFPA 22 sizing and cold-climate freeze protection.
