The Chem-Tainer 225 Gallon PE Rectangular Open Top Tank is a 225-gallon polyethylene rectangular open-top vessel built for water batching, mixing, washdown, and reservoir duty where you need an unrestricted top opening for filling, manual additions, agitation, or inspection. If you have searched for an open top tank, a rectangular open top tank, or simply a rectangular tank that drops into a tight footprint and gives you full access from above, this is that tank.
Will it work for your application?
This is a single-material polyethylene tank with an open top, so there are no factory lid fittings, bulkheads, or sealed-tank gasketing to design around: any side-wall outlet or bulkhead fitting is field-added by the installer. The open top makes it straightforward to top-fill, hand-add solids or liquids, drop in a pump or mixer, and clean out between batches. Plan your installation around full-water load. The decision-relevant numbers are simple: empty, the tank is light enough to position by hand, but at 225 gallons of water it weighs roughly 1,876 lb full, so the pad, stand, or floor underneath must be rated for that static load plus any contents heavier than water. To size your storage volume against actual draw, batch, or reserve needs, work through the Tank Sizing Calculator and the Tank Sizing Guide before you commit to a footprint. Confirm the exact length, width, height, and open-top clearance against the technical drawing on this page so the tank fits the opening, doorway, or pad you have planned.
Set it on the right base
A rectangular open-top tank holds its shape best on a flat, fully supported, level surface. Voids or high spots under a loaded poly tank concentrate stress and can deform the wall over time, so a continuous pad matters. For above-ground placement on a poured base, our guide to concrete pad sizing for above-ground polyethylene tanks walks through the ACI 360R-10 framework so the slab is sized correctly for the load. If this open top tank is serving as a stored reservoir, our guide to fire-water reservoir tank design covers NFPA 22 sizing discipline for reserve volume. If instead it is feeding a water-reuse, rainwater, or condensate-aggregation train, our breakdown of industrial water reuse tank topology covers how to sequence quality-banded storage stages.
The mistake to avoid
The most common error with an open-top water tank is under-building the support and the plumbing for the full load. At nearly 1,900 lb full, this is not a tank to set on bare soil, an uneven deck, or a partially supported frame, and any pump or transfer plumbing should be supported independently rather than hanging off the tank wall. Because there are no factory connections, plan and reinforce any field-added bulkhead before filling rather than after. Confirm the actual exterior dimensions against the technical drawing on this page before you finalize the opening or pad it has to fit.
This tank ships LTL freight from the Chem-Tainer plant in West Babylon, NY, with freight quoted live to your ZIP. Get your exact rate with the Freight Cost Estimator, or call us at 866-418-1777 and we will help you size the tank, confirm dimensions, and lock in delivery.
