The Chem-Tainer 530 Gallon PE Rectangular Open Top Tank is a polyethylene rectangular vessel built for above-ground bulk water storage, batching, and process holding where you need easy top access for filling, mixing, or manual monitoring. With 530 gallons of capacity in an open-top rectangular footprint, it sits flat against walls and tucks into corners far more efficiently than a round tank - which is why it shows up so often in open top tank and rectangular tank applications across water-handling operations.
Will it work for your job?
This is a polyethylene open top tank rated for 530 gallons. At full water capacity it holds roughly 4,420 lbs of water, so the loaded total your pad has to carry is that water weight plus the empty tank weight - check the technical drawing on this page for the empty and shipping weight, and for the exact external length, width, and height so you can confirm the footprint fits your bund, wall run, or corner before you order. Polyethylene is a strong fit for non-pressurized water service: rainwater capture, grey-water and process-reuse holding, and general batch storage. Because it is an open top design, it is intended for atmospheric (vented) service, not for sealed or pressurized applications. If you are sizing this tank into a larger system, run the numbers with our Tank Sizing Calculator and review the Tank Sizing Guide before you commit to a footprint.
Mounting, pad, and application notes
A rectangular open top tank lives or dies on its support. Open-top rectangular tanks carry their water load against flat walls, so they must sit on a fully supported, level, smooth pad with no point loads or gaps under the floor. For a permanent install, size the concrete pad to the loaded weight - water plus empty tank - using our guide on concrete pad sizing for above-ground polyethylene tanks. If this is going into a water-reuse train aggregating rainwater, grey-water, or HVAC condensate, our write-up on industrial water reuse tank topology walks through quality-banded storage and stage sequencing. For rural fire-protection reserve planning, the fire-water reservoir design guide covers NFPA 22 sizing and freeze protection.
The mistake to avoid
The biggest error with an open top tank is treating it like a pressure or transport vessel. It is not. Do not seal the top, do not pressurize it, and do not move it with water in it - 4,420 lbs of liquid will deform an unsupported wall fast. This open top tank ships with no pre-installed plumbing: there is no factory outlet on this SKU, so any bulkhead fitting you need is field-added. It must land on a flat, fully-backed wall section and be supported, since rectangular walls flex more under head pressure than round ones do. Confirm the fitting size and placement against the technical drawing on this page, and call 866-418-1777 to confirm fitting options before you cut anything.
This open top tank ships LTL, freight quoted live to your ZIP - get your number from the Freight Cost Estimator or call 866-418-1777 to confirm your ship-from point, lock in your order, and check lead time. Freight is quoted separately from the list price.
