The Chem-Tainer 180 gallon rectangular open top tank is a polyethylene reservoir for batching, washdown, parts soaking, and open-access water storage where you need to see and reach the liquid surface. At 180 gallons, a full water load reaches roughly 1,501 lb, so the pad and footprint under this tank carry real weight - plan the base before you fill it. The open top makes this tank easy to dip, ladle, mix, or top off by hand, which is exactly why people search for an open top tank, open tank, or rectangular open top tank when a closed reservoir gets in the way of the work.
Will it work for your job
This is a rectangular open top polyethylene tank rated at 180 gallons. The rectangular footprint sits flat against walls and fits tighter into corners, alcoves, and equipment skirts than a round tank of the same capacity - useful when floor space is the constraint. Interior and overall dimensions, rim height, and wall thickness are called out on the technical drawing on this page - read the overall length, width, and height off the drawing before you commit to a wall, curb, or containment pan, and confirm the rim height works for how you will fill and empty it (whether you can ladle or dip over the rim, and whether it slides under existing equipment). For help matching capacity to your actual draw and refill cycle, run the Tank Sizing Calculator or read the Tank Sizing Guide.
What to get right before you buy
This tank ships as a bare open-top vessel - no pre-installed outlets, bulkheads, or fittings. A drain or bulkhead fitting and its gasket are a separate add you install yourself, not an option to select here. The most common mistake on an open top rectangular tank is treating it like a pressure or transfer vessel: it is an open atmospheric reservoir, not built to be sealed, pressurized, or run with a tight-fitting closed lid that pulls vacuum on drawdown. If you do plumb a wall fitting, locate it off the technical drawing and confirm the wall thickness at that point rather than guessing. And because the top is open, account for evaporation, debris, and freeze exposure: an above-ground polyethylene tank in cold climates needs a planned base and freeze strategy, which the concrete pad sizing guide for above-ground polyethylene tanks walks through.
Where it fits in a water system
Open top rectangular tanks earn their place as buffer, blend, and aggregation vessels. If you are collecting and reusing grey-water, rainwater, or HVAC condensate, the open top simplifies inlet routing and inspection - the industrial water reuse tank topology guide shows how these tanks slot into a staged reuse train. For on-site fire-water reserve thinking, the fire-water reservoir design guide covers NFPA 22 sizing discipline and freeze protection.
This tank ships LTL freight from West Babylon, NY, quoted live to your ZIP - get your exact number from the Freight Cost Estimator or call 866-418-1777. Listed price is before freight, and because freight scales with distance from West Babylon, NY, estimating it early helps you budget separately before you order.
