The Chem-Tainer 75 Gallon PE Rectangular Open Top Tank (SKU TC-R243024A) is a 75-gallon polyethylene open-top rectangular tank built for batch mixing, washdown stations, parts soaking, secondary catch, and general water handling where you need easy top access for filling, dipping, or hand-stirring. Its squared footprint sits flush against walls and slides into corners better than a round tank of the same volume, which makes it a practical fit for tight wash bays, greenhouse benches, equipment skids, and grey-water, rainwater, or HVAC-condensate collection points - see our industrial water reuse tank topology guide if you are aggregating reclaimed water.
Will this open top tank work for your setup?
This is a straight polyethylene open-top rectangular tank rated at 75 gallons. Filled to capacity with water it carries roughly 626 pounds, so plan your stand, bench, or pad to hold that load with margin and keep the base fully and evenly supported - an open-top rectangular tank wants a flat, continuous surface under it, not point supports at the corners. Because the top is open, this tank is meant for vented, atmospheric-pressure service; it is not a sealed or pressurized vessel. The open top makes it straightforward to drop in a sump pump, mixer, float switch, or aerator and to clean it out by hand. If you are not certain a 75-gallon footprint matches your refill rate and dwell time, run the numbers with our Tank Sizing Calculator or read the Tank Sizing Guide before you commit to a size.
Dimensions, fittings, and the drawing
For exact length, width, height, and wall thickness, see the technical drawing on this page - it is the controlling document for this rectangular open top tank and shows the molded footprint you will need to fit your space. This open-top model ships without pre-installed bulkhead fittings, so if you want a drain or outlet you will add it yourself in the flat sidewall: confirm the fitting size against the drawing's molded boss before you drill, then pick a fitting and gasket suited to your contents and torque it against a clean, flat surface. If your installation will sit on a poured slab, our guide on concrete pad sizing for above-ground polyethylene tanks walks through supporting the filled weight correctly.
The mistake to avoid
The most common error with an open-top rectangular tank is treating the flat walls like the curved walls of a round tank. Flat polyethylene panels flex more under a full head of water than a cylinder does, so do not mount heavy fittings high on the sidewall, do not rely on the rim to carry external load, and never let the tank overhang its support at the edges. Keep it fully supported underneath, fill it as a vented atmospheric tank, and it will give you long, predictable service. If you are storing anything other than water, confirm compatibility first rather than assuming an open-top water tank is rated for it.
This rectangular open top tank ships LTL freight from Chem-Tainer's plant in West Babylon, New York, with the rate quoted live to your ZIP - get your number on the Freight Cost Estimator or call us at 866-418-1777. Planning a larger water reservoir or a multi-tank layout? Our team can help you spec it - reach out and we will quote freight to your delivery address.
