The Chem-Tainer 70 Gallon Open Top Batch Storage Tank (SKU TC2436AA) is a compact cylindrical open-top tank built for batch mixing, holding, and decant work where you need easy top access to your liquid. It measures 24 inches in diameter and 36 inches tall, sitting on a 24" round footprint (the 24 x 24 figure is the bounding square of that round base, not a square tank). It slides into a tight corner of a wash bay, treatment skid, or mix station without eating up floor space. Molded by Chem-Tainer in Natural White polyethylene, the natural-white wall lets you eyeball your liquid level at a glance instead of guessing. If you searched for an open top tank, a white open top tank, or a small open tank for storage, this is the size that fits a single batch without committing to a full bulk vessel.
Will it hold what you plan to put in it?
This tank carries a 1.9 specific gravity rating, which is unusually high for a tank this size and tells you the wall thickness is built for dense liquids, not just water. Filled with plain water (specific gravity 1.0), the contents weigh about 584 lb. At the full 1.9 rating, the tank is engineered to carry up to roughly 1,109 lb of contents, so you have real headroom for heavier liquids rather than water alone. That 1.9 is already the heavy-duty rating for this size, so there is no heavier-wall version of this tank to step up to. Match your liquid's specific gravity to that 1.9 ceiling before you fill, and use the Tank Sizing Calculator or the Tank Sizing Guide to confirm 70 gallons is the right working volume for your batch cycle. Refer to the technical drawing on this page for the dimensional and capacity details.
Open top means you supply the lid logic
This is an open top configuration, so the top is fully accessible for filling, manual mixing, hand-dipping, and cleanout, but it does not arrive plumbed with bulkhead fittings. It ships as a bare open-top vessel; bulkhead outlets, sidewall fittings, and gaskets are added per order, so call 866-418-1777 to spec them and we will match the install to how you actually run the tank. The wide-open top also makes it straightforward to add a mixer, drop in a pump intake, or lower a basket. For anyone aggregating grey-water, rainwater, or condensate into quality-banded batches, our guide on industrial water reuse tank topology walks through how to stage storage in a treatment train.
The mistake to avoid
An open top tank is not a sealed tank. Do not treat it as a contained vessel for anything that fumes, splashes during transport, or needs to be kept clean from airborne debris, and do not overfill past the working volume since there is no closed top to manage surge. Open-top tanks are not rated for transport while full or for pressurized, sealed service. And do not assume the 1.9 rating makes the tank right for every dense liquid: the specific gravity rating is a static structural figure, not a chemical-compatibility or transport approval. If you are mounting it outdoors or on an elevated stand, set it on a flat, fully supporting base, our guide on concrete pad sizing for above-ground polyethylene tanks covers the pad framework.
This tank ships LTL freight from Chem-Tainer's plant in West Babylon, NY, with the rate quoted live to your ZIP code. Because it leaves a single Northeast ship point and a 36"-tall open-top can pick up dimensional cost on the truck, customers far from the Northeast should pull a quote early, run your delivery ZIP through the Freight Cost Estimator for a real number or call us at 866-418-1777. We will confirm dimensions, fitting options, and the best freight lane for your location before you order.
