The Chem-Tainer 22 Gallon PE Rectangular Open Top Tank is a compact polyethylene open-top vessel built for batch mixing, small-volume water holding, parts soaking, and point-of-use storage where an accessible top opening matters more than a sealed lid. At 22 gallons in a rectangular open-top format, it fits tight footprints and tucks under benches or beside equipment, which is exactly why buyers searching for an open top tank or a rectangular open top tank land on a unit like this one.
Will it work for your job?
This is a polyethylene rectangular open-top tank with 22 gallons of capacity. Use the open top for easy fill, hand-mixing, and visual monitoring of the liquid level. Plan your stand or shelf around a full load: filled with water at a specific gravity of 1.0, this tank carries about 183 pounds, so the surface beneath it needs to support that operating weight plus the tank itself. Because it is an open-top design, it is intended for ambient, vented service rather than pressurized or fully sealed applications. If you are unsure whether 22 gallons matches your draw-down and refill cycle, run the numbers with our Tank Sizing Calculator or read the Tank Sizing Guide before you commit.
Reading the specs and drawing
For exact outside dimensions and wall geometry, see the technical drawing on this page. That drawing is the reference for confirming the tank clears your cabinet, secondary containment basin, or equipment skid, and for laying out any support framing. Since this is an open-top rectangular tank with no factory fittings called out, any outlet, bulkhead, or drain you add is an aftermarket modification, so verify wall thickness and flat-area placement against the drawing before you drill. This open-top format also suits batch holding in grey-water, rainwater, and HVAC-condensate reuse setups; for how a small vessel like this fits into a larger reuse train, see our guide on industrial water reuse tank topology.
The mistake to avoid
The most common error with a small open-top tank is treating it as a sealed or chemical-service vessel. This unit is sized for water-service holding and mixing at a specific gravity of 1.0; it is not specified here for higher-density or aggressive chemical contents, and an open top offers no spill or vapor control. If your liquid is heavier than water or chemically active, that is a different tank specification entirely. Match the tank to the actual liquid, not just the volume.
Keep the two weights straight: the roughly 183 pounds above is the filled operating load for sizing your stand or pad, while LTL freight is quoted on the empty tank and its dimensions. This unit ships LTL freight from the Chem-Tainer plant in Delano, MN, with the cost quoted live to your ZIP code. Get your number instantly with our Freight Cost Estimator, or call 866-418-1777 and we will quote it for you. Planning a permanent install? Our guide on concrete pad sizing for above-ground polyethylene tanks covers the support details that keep a filled tank level and stable for the long haul.
