300 Gallon Plastic Water Storage Tank - Black (35" x 89")

The Norwesco 300 Gallon Plastic Water Storage Tank (model N-41530) is a black, vertical polyethylene tank measuring 35 inches in diameter and 89 inches tall. This is the tall, narrow 300-gallon footprint built for sites where floor space is tight but vertical clearance is available - the alternative 300-gallon (46 x 50) is the short, wide version for low-ceiling spaces. The 35-inch round base lets it tuck into a corner, equipment room, or pump shed, while the black resin blocks light to discourage algae growth, which is why this tank is a common pick for water storage, rainwater capture, and general bulk water service.

Will this vertical storage tank work for your water?

This is a vertical water storage tank rated for a specific gravity of 1.0, which covers fresh water and water-weight contents. Full of water it carries roughly 2,502 pounds of contents, so the pad, platform, or floor underneath it has to support that load without flexing. The tank itself ships light as an empty polyethylene shell, but plan the base around the full 2,502-pound load. Site it on a flat, fully supported surface - polyethylene tanks must bear on the entire bottom, not on a partial edge or framing. Because this is the 89-inch-tall profile, confirm your ceiling height plus any doorway or hatch the tank must clear before ordering. If you are deciding between this and the wider 46 x 50 version, our Tank Sizing Calculator and Tank Sizing Guide walk through fit, head height, and pump considerations.

Sizing it into a larger system

At 300 gallons this tank works well as a single-point reserve or as one node in a larger storage train. If you are aggregating grey water, rainwater, or HVAC condensate into quality-banded storage, our guide on industrial water reuse tank topology covers how to sequence multiple tanks. For rural fire protection and reservoir sizing, see our write-up on fire-water reservoir tank design, which also covers freeze protection for cold-climate service. For a full walkthrough of this exact model, read the 300 gallon (35 x 89) buyer's guide.

The mistake to avoid

The most common error on a tall, narrow tank like this is treating the 1.0 specific gravity rating as room to store something heavier than water. This tank is rated for water-weight contents only - if your liquid weighs more than water, it needs a higher-SG tank, not this one. Confirm the lid size, outlet, and gasket you need for your plumbing against the technical drawing on this page before you order, and stage the tank on a level, fully supported base sized for the 35-inch diameter.

This tank ships LTL freight from the Norwesco plant in Burnet, TX, and freight is quoted live to your ZIP. A Texas origin means a longer-haul quote to the Northeast and West Coast, so get a real number in seconds with our Freight Cost Estimator or call us at 866-418-1777. Listed price is before freight; LTL is quoted separately to your delivery address.

3 Year Warranty