The Chem-Tainer 300 Gallon HDPE Vertical Liquid Storage Tank (SKU TC3581IA-BLUE) is a 300-gallon vertical storage tank molded from polyethylene, standing 85 inches tall on a compact 35 x 35 inch square footprint. It carries a 1.9 specific-gravity rating - the single number that matters most when you decide what goes inside it. Filled with water, the tank and contents weigh roughly 2,502 pounds; engineered to its maximum rated contents weight, it holds up to 4,754 pounds. Those figures, together with the dimensions on the technical drawing on this page, tell you exactly what your pad and your forklift need to handle.
Does this 300 gallon vertical tank work for your application?
This is a vertical HDPE tank built for indoor or outdoor liquid storage where vertical height is acceptable and floor space is tight - the 35-inch square base keeps it out of the way. The 1.9 SG rating is the heavier-duty option compared with a standard 1.5-SG water tank: the wall is built to carry liquids substantially denser than water, so water (SG 1.0) and most water-based contents sit well within the tank's structural envelope. The material is FDA-approved polyethylene, which supports potable water and general liquid-storage duty. Before filling with anything heavier than water, verify that your liquid's specific gravity multiplied by your fill volume stays under the 4,754 lb maximum rated contents weight. To confirm 300 gallons is the right capacity for your draw-down or reserve volume, work through the Tank Sizing Calculator and the Tank Sizing Guide first. Comparison shoppers can also read our 300-gallon vertical liquid storage tank buyer's guide and the Snyder vs Norwesco vs Chem-Tainer comparison.
Fittings and gaskets
Fitting and gasket configuration is confirmed per order. Call 866-418-1777 to specify outlet and bulkhead size and the gasket material right for your liquid - that conversation is the place to lock in the connection details rather than assume a standard layout.
The mistake to avoid
The most common error on a vertical tank this size is treating the weight as an afterthought. At over 2,500 pounds full of water - and up to 4,754 pounds at the rated maximum - this tank demands a level, load-rated foundation. A vertical HDPE tank set on uneven ground or an undersized pad concentrates stress at the base and shortens its service life. Confirm your pad is flat and engineered for the full filled weight, and verify the 35 x 35 inch footprint clears your doorway or hatch before delivery day. For fire-reserve or rural water-supply duty, our guide on fire-water reservoir tank design covers cold-climate and reserve-sizing discipline, and the HDPE wall-thickness guide explains where these tanks fail first.
Freight
This tank ships by LTL freight, quoted live to your ZIP code. Chem-Tainer fulfills from several plants - Bensenville, IL; Hanford, CA; Hummelstown, PA; Lake Wales, FL; and Marked Tree, AR - and your order ships from the location nearest you to keep transit and cost down. Get a real number for your delivery with the Freight Cost Estimator, or call 866-418-1777 and we will line up the closest plant and the right carrier for your 300 gallon vertical storage tank.
