The Chem-Tainer 330 Gallon Plastic Open Top Batch Storage Tank (SKU TC4548AA) is a cylindrical open-top vessel built for batch mixing, dosing, and bulk storage where you need a wide-open top for loading, manual additions, or an installed mixer. It stands 48 inches tall on a 45 x 45 inch footprint, holds 330 gallons, and is molded from natural white polyethylene so you can read the liquid level through the wall. This is a working open top tank - the kind operators reach for when a sealed vertical would get in the way of the process.
Will it work for your job
The footprint is 45.0 x 45.0 inches and the tank stands 48 inches tall, so plan your pad and overhead clearance for top loading. Filled with plain water (specific gravity 1.0) the contents weigh about 2,752 pounds. The 2.0 specific gravity rating means the wall is built to carry up to twice the weight of plain water - roughly 5,504 pounds of contents. That rating is structural headroom, not a chemical clearance: it confirms the wall can handle dense batch contents, but resin chemistry still governs whether a given fluid is compatible. At a 2.0 SG rating, this tank carries denser batch contents than the common 1.5 SG open-tops - useful margin for heavier slurries and concentrated solutions, compatibility permitting. Use the Tank Sizing Calculator and the Tank Sizing Guide to confirm 330 gallons matches your batch volume and refill cycle, and see the technical drawing on this page for exact dimensions before you build the pad.
The mistake to avoid
The most common error with an open top tank is reading the SG 2.0 wall rating as a chemical clearance. It is a structural load number, not a compatibility guarantee. Before you put anything other than water in this tank, confirm the fluid against the manufacturer's chemical-resistance chart at the specific concentration and temperature you will run. There is also a hardware decision: this is an open-top tank with no factory-installed outlet or bulkhead fitting, so if you need a bottom or side draw, plan to add a bulkhead and gasket. When you do, the gasket and fitting material must be chemically compatible too - confirm both the polyethylene wall and any seal against the chart at your concentration and temperature. Finally, an open top loses heat fast in cold climates, so if this sits outside through winter, design for freeze protection up front. For a permanent install, set the tank on a properly sized, level pad; our concrete pad sizing guide walks through the ACI framework, and the fire-water reservoir design guide covers cold-climate reserve water storage.
Built for batch and reuse work
Because the top is fully open, this Chem-Tainer is a natural fit for grey-water, rainwater, and HVAC condensate aggregation where you stage and blend water before reuse - our industrial water reuse topology guide shows how a white open top tank fits into a quality-banded storage train. The wide mouth also makes it easy to drop in an agitator or paddle for mixing.
This tank ships LTL freight from the Hanford, CA plant, quoted live to your ZIP code - get a number in seconds with the Freight Cost Estimator, or call 866-418-1777 and we will quote it for you. Listed before freight; LTL is quoted separately to your delivery ZIP.
