The Norwesco 300 Gallon Vertical Liquid Storage Tank (part #41528) is a natural white polyethylene vertical tank that holds 300 gallons in a compact 35-inch square footprint and stands 79 inches tall. That narrow base keeps a meaningful volume over a limited slab area, making it a practical 300 gallon vertical storage tank for tight equipment rooms, well sheds, and trailer corners where a wider tank will not fit. The 1.5 specific gravity rating means the wall is built to carry liquids up to one and a half times the weight of water, so it runs full water service with real margin to spare.
Will it work for your storage job?
Filled with water, this tank carries roughly 2,502 pounds of contents, and at its full 1.5 specific gravity rating it is built to hold up to about 3,753 pounds. That headroom is a buyer benefit, not just wall strength: because it is rated to 1.5 SG, it carries denser water-like liquids - brine and light water-based solutions within the water class - without exceeding its rating, all on the same 35-inch footprint. Plan the pad accordingly. A level base that fully supports the entire 35 x 35 inch footprint is what keeps a tall, narrow tank stable when full. Use the Tank Sizing Calculator and the Tank Sizing Guide to confirm 300 gallons matches your draw and refill cycle before you buy.
Specifications and fittings
Capacity: 300 gallons. Dimensions: 35 inches wide x 79 inches tall (35 x 35 inch footprint). Material: polyethylene, natural white. Specific gravity rating: 1.5. Manufacturer: Norwesco, made in Burnet, Texas. Fitting and outlet sizes and locations are not listed online for this unit - confirm them against the technical drawing on this page or call 866-418-1777 before ordering bulkhead fittings, gaskets, or a manifold. Match your thread and outlet size, and your gasket material, to your plumbing the first time; a wrong or missing gasket is the most common leak source on a poly tank. Budget the full 35-inch diameter plus access room and at least 79 inches of vertical clearance for lid access and filling.
One mistake to avoid
The most common error with a tall vertical tank like this 79-inch unit is setting it on a base that does not fully support the bottom. Any gap, slope, or soft spot under the 35-inch footprint concentrates more than 2,500 pounds of water onto one area and stresses the wall. Set it on a flat, level, fully bearing surface, and for outdoor installs account for wind load on the tall profile.
Comparing 300 gallon configurations
This is the 35 x 79 inch version. If you have limited overhead and cannot clear 79 inches, the same 300 gallons is available in a wider, shorter footprint - see the 46 x 50 inch configuration guide to compare. For a full walkthrough of this exact unit, see the 35 x 79 #41528 buyer's guide.
This tank ships LTL freight from the Norwesco plant in Burnet, Texas, with the rate quoted live to your ZIP code. Get your number now with the Freight Cost Estimator, or call 866-418-1777 to lock in your order.
3 Year Warranty
