Chem-Tainer 300 Gallon Plastic Vertical Water Storage Tank in White

The Chem-Tainer 300 Gallon Vertical Water Storage Tank (SKU TC3581IW-NAT) is a white polyethylene tank built for straightforward bulk water storage. This is the 81-inch-tall build, standing on a compact 35 by 35 inch footprint, so it holds a full 300 gallons of water while occupying roughly the floor space of a small pallet. That vertical profile makes it a practical fit where floor area is tight but overhead height is available, and it answers the first question a buyer has: yes, this tank is sized and rated to hold 300 gallons of water. If you are cross-checking a general 300 gallon vertical tank buyer's guide, note that dimensions vary by build, and the tank on this page measures 81 inches tall.

Will it hold your water safely?

Filled to capacity with water, this tank carries about 2,502 pounds of contents, which is also its maximum rated contents weight. That number drives the pad or platform underneath it. Water has a specific gravity of 1.0, and this tank is rated to specific gravity 1.0, so plain water is exactly what it is designed for.

Key load spec: 2,502 lb full · 35 x 35 in base · continuous full-footprint support required.

Set it on a smooth, level surface that carries the full 2,502-pound load across the entire 35 by 35 inch base. Polyethylene tanks need continuous support under the whole footprint, not just the edges, because the water load is what gives the walls their working stress. To confirm this size against your daily draw and refill cycle, run the numbers through the Tank Sizing Calculator or read the Tank Sizing Guide before you buy.

Where it fits, and what to confirm

This is a general-purpose vertical water storage tank for rainwater collection, hauled-water supply, irrigation reserves, and similar non-pressurized bulk water jobs. Fitting and lid configuration is confirmed at the time of quote, so call 866-418-1777 with your outlet and manway needs and we will match the build to your plumbing. If you are weighing this against larger or competing units, the 300 gallon vertical tank buyer's guide and the Snyder vs Norwesco vs Chem-Tainer vertical tank comparison show how these vertical storage tanks line up. For emergency and reuse planning, our fire-water reservoir design and industrial water reuse topology guides go deeper.

The mistake to avoid

This tank is rated for specific gravity 1.0, which covers water. Do not repurpose it for a heavier liquid or a solution denser than water without confirming a higher-rated tank first, because filling a 1.0-rated tank with heavier contents overloads the walls. For plain water storage at 300 gallons, it is matched to the job. See the technical drawing on this page for the tank profile.

This tank ships LTL freight, quoted live to your ZIP from the nearest Chem-Tainer plant to you, so you are not paying single-origin freight from across the country. Production and shipping points include Bensenville, IL; Hanford, CA; Hummelstown, PA; Lake Wales, FL; and Marked Tree, AR. Get your freight cost in seconds with the Freight Cost Estimator, or call 866-418-1777 to lock in your quote and lead time.