Chem-Tainer 115 Gallon PE Rectangular Open Top Tank

The Chem-Tainer 115 Gallon PE Rectangular Open Top Tank is a polyethylene rectangular open top tank built for batching, mixing, washdown, and general water storage where you need full top access to load, stir, or monitor the contents. The open top lets you add material by hand, drop in a mixer, or check levels without working around a sealed fitting, and the rectangular footprint sits cleanly against benches and walls.

Will it work for your setup?

This tank holds 115 gallons of water-service capacity. The number that drives your stand or pad is the loaded weight: 115 gallons of water alone is about 959 lb, and the polyethylene shell adds to that, so size your support for the loaded total - not the 115-gallon figure. An open top rectangular tank carries its mass across a flat base, so it wants a level, fully supported surface underneath, not a frame that only catches the corners. If you are using this as a batching or aggregation vessel - grey-water, rainwater, or condensate collection - our guide on industrial water reuse tank topology covers how quality-banded storage trains fit together. Still deciding between this and a larger or smaller vessel? Run the numbers through our Tank Sizing Calculator and review the Tank Sizing Guide before you lock in a footprint. People shopping this tank often search for an open top tank, an open tank, or simply a rectangular tank - this is the rectangular open top version of that family.

Mounting and support

Because this is an open top design, the rim is not a sealed flange - it stays accessible. Set the tank on a continuous, flat surface sized to its full base, and confirm the exact outside dimensions with us before you commit a bench or wall location, so the footprint matches your space. If you are pouring a concrete pad for above-ground polyethylene storage, our guide on concrete pad sizing for above-ground polyethylene tanks walks through the ACI 360R-10 framework and where the ACI 318 boundary sits, so the pad carries the loaded weight without cracking or settling. Cross-check the technical drawing on this page for the as-built layout.

One thing to get right

The most common mistake with an open top tank is treating the rim like a closed-tank fitting boss. It is not. Do not drill or thread the upper wall for pressure connections as if it were a sealed vessel - this style is designed for gravity fill, mixing, and manual access from the top. If your process needs a fully enclosed, vented, or pressure-rated arrangement, that is a different tank type, and a quick call to our team will point you to the right one before you buy.

This tank ships LTL freight, quoted live to your ZIP, from the nearest stocking plant - Hummelstown, PA or West Babylon, NY. A buyer in the Northeast corridor should expect a shorter lane from whichever of the two is closer, which is exactly why the rate is quoted to your address rather than guessed. Get a real number with our Freight Cost Estimator, or call 866-418-1777 and we will quote it for you and confirm the right tank for your application.