The Chem-Tainer 12 Gallon PE Rectangular Open Top Tank is a compact polyethylene open-top vessel for batching, parts washing, small-scale mixing, and point-of-use water handling where you need an unobstructed top opening rather than a closed, fitted tank. At 12 gallons in a rectangular open-top format, it sits on a bench, in a cabinet, or alongside a process line without claiming the footprint a round tank would. If you have searched for an open top tank, a rectangular open top tank, or simply a rectangular tank to hold water or rinse solution, this is the small-format version of that workhorse.
Will this tank work for your job?
This is a 12-gallon rectangular open top tank molded from polyethylene. The open top gives you full access for hand-filling, dipping, manual stirring, and quick cleanout between batches - there is no lid opening or fitting to design around. Filled to capacity with water it weighs about 100 lb full (tank plus contents), so any bench or shelf rated comfortably above that figure will support it. Check your exact internal and external dimensions and usable depth against the technical drawing on this page before you commit it to a fixed location or enclosure - on a bench or cabinet tank, footprint and height clearance are the questions that decide the job. To match capacity to your real draw and refill cycle, run the numbers through our Tank Sizing Calculator or walk through the Tank Sizing Guide.
What you get - and what you add
This ships as a bare open-top vessel: no pre-installed bulkhead fittings, outlets, or gaskets. That is by design - an open-top tank is filled and served from the top. If you need a drain or outlet, it must be field-added and properly sealed to a flat section of wall. Plan the tank as gravity-fed or hand-served rather than plumbed into pressure service, and do not treat the rectangular walls as a structural mount for heavy piping.
The mistake to avoid
An open top tank is a storage and handling vessel, not a pressure or closed-process container - do not cap or seal the top and pump into it. Just as important, match the contents to the tank: this is a standard polyethylene water-service tank. Before you put anything other than water in it, confirm chemical compatibility against the resin and specific gravity rating rather than assuming it handles your solution. This pack carries no SG rating or chemical-rated companion variant for this model, so do not infer one - if your service is anything other than water, call 866-418-1777 for the resin and SG spec and a chemical-rated alternative before you order.
This tank ships LTL freight from the Delano, Minnesota plant, quoted live to your ZIP code. Because freight on a small open-top tank moves with your delivery location and accessorial needs (liftgate, residential, limited access), get an exact number before you order with the Freight Cost Estimator, or call 866-418-1777 and we will quote it and help you size and ship the 12 Gallon Rectangular Open Top Tank right.
