Chem-Tainer 18 Gallon Plastic Open Top Batch Storage Tank with Lid in Black

The Chemtainer 18-gallon open-top batch tank (SKU R121818A-BLACK) is a rectangular polyethylene vessel built for small-batch mixing, staging, and short-term storage where you need easy top access. It holds 18 gallons in a compact footprint that measures 14 inches wide by 20 inches long by 19 inches tall, so it fits on a bench, in a cabinet, or beside a process line without eating floor space. The tank ships with a 5-inch lid and weighs 12 pounds empty, so one person can reposition it between batches.

Will it work for your batch?

This is an open-top rectangular design molded from polyethylene, sized for water and water-like batch work rather than pressurized or sealed service. The base is 14 by 20 inches with a 19-inch height, and the 5-inch top opening is where you add, sample, or dose. That 5-inch port also sets your access, so confirm your mixer shaft, fill nozzle, or dip tube clears a 5-inch opening before you build around it. On weight, plan for the full case, not the empty tank: 12 pounds empty versus about 150 pounds full of water is a 138-pound swing, so size your bench or shelf and any tie-down for the loaded condition. If you are matching this tank to a specific volume or deciding between sizes, run the numbers through our Tank Sizing Calculator or read the Tank Sizing Guide before you commit.

What to watch before you buy

Two things. First, this is a water-service batch tank: no specific-gravity rating or chemical certification is published for it. If you are storing anything heavier than water or chemically active, confirm compatibility and source a properly SG-rated tank before use rather than assuming this one covers it. Second, it is an open-top vessel with a 5-inch lid, not a sealed drum. That open geometry is exactly what makes it good for mixing and manual access, but it means it is not built for closed transport or vapor containment. Match the tank to how you actually work: open-top batch storage, top-fill, top-access.

Freight

This tank ships LTL, quoted live to your ZIP. Chemtainer stocks from several plants, and freight routes from the location nearest you, including Delano, MN and West Babylon, NY along with Illinois and Pennsylvania points. Get a real number in seconds with the Freight Cost Estimator, or call us at 866-418-1777 and we will quote it by phone. Listed price is before freight; there is no freight figure baked into the list.