The Chem-Tainer 120 Gallon PE Rectangular Open Top Tank is a polyethylene rectangular open-top vessel built for straightforward bulk water storage, batching, and transfer work where you need easy top access for filling, mixing, or dipping. With a 120-gallon working capacity in a rectangular footprint, it tucks tight against walls and into corners where a round tank wastes floor space - a practical pick for wash stations, holding reservoirs, and rectangular open tank setups where the open top is the whole point.
Will it work for your application?
This is a 120-gallon open top tank molded from polyethylene, so it handles water and water-based liquids in a non-pressurized, gravity-fed arrangement. Plan your support structure around the full load: filled with water this tank carries roughly 1,001 lbs, so the pad or platform underneath needs to be flat, level, and rated for that weight with margin. Because it is an open top design, it is meant for atmospheric storage and easy access rather than sealed or pressurized service. If you are not certain 120 gallons matches your draw rate or storage window, run the numbers with our Tank Sizing Calculator and review the Tank Sizing Guide before you commit.
Dimensions, fittings, and siting
Confirm the exact length, width, and height against the technical drawing on this page so you can verify clearance and fit in your space before ordering - on a rectangular tank, that footprint is the whole reason to choose this shape, so check it against your wall or corner. This tank ships as a bare open-top vessel with no pre-installed bulkheads, outlets, or overflow fittings: any fitting you add has to be field-installed on a flat, unstressed section of wall with a properly rated gasket, and the tank kept vented and unpressurized. For an above-ground install, a properly sized concrete pad keeps the rectangular base fully and evenly supported under that ~1,001 lb full-water load; our guide on concrete pad sizing for above-ground polyethylene tanks walks through the ACI 360R-10 framework. If this tank is one piece of a larger reuse or aggregation setup, our overview of industrial water reuse tank topology covers how grey-water, rainwater, and condensate streams get banded and sequenced.
The mistake to avoid
The most common error with an open top tank is treating it like a sealed pressure vessel, or plumbing it with fittings it was never designed to take. This is an atmospheric, gravity-fed open-top design - any outlet, bulkhead, or overflow has to be installed correctly, with the tank vented and unpressurized. Just as important, do not underestimate the full-water weight: at about 1,001 lbs loaded, the gap between a flat level pad and a slightly uneven one shows up fast as stress on the tank base.
This tank ships LTL freight from a Chem-Tainer plant, quoted live to your ZIP code. Get your exact freight number with the Freight Cost Estimator, or call us at 866-418-1777 to talk through sizing, siting, and shipping for your project.
