The Chem-Tainer 265 Gallon PE Rectangular Open Top Tank is a polyethylene rectangular open-top vessel built for batch mixing, parts washing, secondary containment, and general bulk water staging where you need full top access for filling, agitation, or manual loading. With 265 gallons of capacity and an open top, it suits open-batch processes and rainwater or process-water holding where a sealed dome would only get in the way. If you searched for an open top tank, a rectangular open top tank, or an open tank, this is the rectangular footprint that seats squarely against a wall or inside a bermed containment area without the wasted floor space of a round drum.
Will it work for your job?
This tank holds 265 gallons and is molded from polyethylene. The single most load-bearing number for your install is the full water weight: filled to the top with water at roughly 8.34 lb per gallon, it carries about 2,210 pounds. Size your pad and support for that full load, not the empty shell. If you are mixing or storing anything heavier than water, the higher specific gravity of that fluid raises the load further, so plan around the heaviest fluid you intend to run. For matching capacity and footprint to your throughput, run the Tank Sizing Calculator or read the Tank Sizing Guide; for setting it on a slab, the concrete pad sizing guide walks through the ACI framework for above-ground polyethylene tanks.
Specifications and setup
Confirm exact exterior dimensions, wall layout, and lip height against the technical drawing on this page before you build a stand or order containment, since the rectangular footprint and wall height determine how it seats against a wall or inside a berm. As an open-top tank, it ships without a sealed dome or top fittings, so any plumbing, overflow, or outlet you need is added at installation to match your process. Keep this vessel to water and water-based duty rather than aggressive chemical storage. Quick reference: capacity 265 gallons, material polyethylene, configuration rectangular open top, full water weight about 2,210 lb.
The mistake to avoid
The most common error with an open-top rectangular tank is treating the wall as if it carries the same hoop strength as a closed cylindrical tank. It does not. Support the full footprint on a flat, continuous surface, never on point loads or a partial frame, and account for the full 2,210-pound water weight at the base. Do not assume this open-top model is rated for sealed-pressure or buried service, and do not press it into chemical duty it was not built for. If your application is water reuse, the industrial water reuse topology guide covers grey-water, rainwater, and condensate staging trains.
This tank ships LTL freight from West Babylon, New York, with cost quoted live to your ZIP code. LTL pricing depends on the tank's shipping weight and your destination, so get a real number with the Freight Cost Estimator before you order, or call 866-418-1777 for help sizing, fitting, and freighting the right open top tank for your site.
