The Chem-Tainer 40 Gallon PP Cylindrical Open Top Tank is a compact polypropylene vessel built for water and general-purpose liquid handling where you need easy top access to the tank interior. It stands 40 inches tall on an 18 x 18 inch footprint, holds 40 gallons, and molds in natural white polypropylene. If you have been searching for a white open top tank, an open tank, or a straightforward 40 gallon open top tank for mixing, dipping, or batch holding, this is that tank.
Will this tank do the job?
The open top design gives you an unobstructed opening across the full 18 inch diameter, which makes it practical for hand-mixing, manual dosing, parts dipping, or feeding a pump from above. Polypropylene is a rigid resin that holds its cylindrical shape well and handles a wider temperature range than standard polyethylene, so it is a common pick for warm-water and light process duty. Because the top is open, this is an atmospheric holding tank, not a sealed or pressurized one, and it is not designed for a bolted lid seal. To confirm exact dimensions and any molded features, see the technical drawing on this page.
Sizing, weight, and freight
Empty, this tank is light enough to reposition by hand, so set it in place before you fill it. Filled with water, a 40 gallon tank weighs roughly 334 pounds, so plan your stand or floor accordingly. On an 18 x 18 inch footprint that is a meaningful point load for the area, and a flat, fully supporting surface underneath the base is what keeps the wall from stressing over time. It ships LTL freight from West Babylon, NY, quoted live to your ZIP. If you are still deciding on capacity or how the tank sits in your space, run the numbers with our Tank Sizing Calculator or read the Tank Sizing Guide. Planning a fixed installation? Our guide on concrete pad sizing for above-ground tanks walks through a supporting base done right, and if this feeds a reuse or holding train, our industrial water reuse tank topology guide covers how top-access batch tanks fit into a larger system.
The mistake to avoid
Do not treat an open top tank as a transport or closed-storage vessel. With no sealed lid it is meant to stay put and stay upright, and it should not be moved with liquid in it or used where the contents must be enclosed. Match the tank to atmospheric, top-access service and it will do exactly what it is built to do.
This tank ships LTL freight from West Babylon, NY, quoted live to your ZIP with our Freight Cost Estimator so you see real transit cost before you commit. For help sizing or spec questions, call 866-418-1777 and we will point you to the right tank.
