The Chem-Tainer 150 Gallon Open Top Flat Bottom Internal Flanged Tank (TC3151IF) is a white polypropylene open top tank built for straightforward water storage, batching, and open-tank transfer work. It holds 150 gallons in a cylindrical body that stands 51 inches tall on a compact 31 x 31-inch footprint, so it tucks into a tight corner of a shop, wash bay, or process line while still giving you real working volume. The flat bottom sits directly on a level pad or platform, and the internal flanged top rim adds rigidity where an open tank needs it most. Note this SKU carries a minimum order quantity of 6.
Does this open top tank fit your job?
Start with the numbers. At 150 gallons on a 31.0 x 31.0-inch footprint, a full tank of water weighs about 1,251 pounds, so plan the pad and floor loading around that filled weight, not the empty shell. The 51-inch height is worth a second look on an open-top unit you fill from above: at that reach, factor in a step or platform for topping off, dipping, or hand-adding product. The open top also makes the tank easy to clean out between batches. If you are matching this 150 gallon size to a demand or a refill cycle, run the numbers through our Tank Sizing Calculator and the Tank Sizing Guide before you commit to a footprint. See the technical drawing on this page for the full dimensional layout.
Set it up right
An open top flat bottom tank rewards a flat, fully supported base. Set it on a smooth, level concrete pad or a full-support platform so the flat floor bears evenly and the sidewall stays true when the tank is full. For above-ground pad work, our guide on concrete pad sizing for above-ground tanks walks through the ACI framework for sizing the slab under a filled tank. If this unit feeds a rainwater, grey-water, or reuse-storage train, the topology guide on industrial water reuse tank topology covers how to stage banded storage.
Fittings and the mistake to avoid
This SKU ships with no pre-installed fittings, so budget your own bulkhead or through-wall connection, plus a gasket sized to the sidewall, if you plan to plumb an outlet — and locate it to leave the residual heel you want above the flat floor. Confirm the internal flanged rim clears any lid, cover, or agitator bracket you plan to add, since the flange sits inside the top opening. Above all, match the tank to the liquid. This is a polypropylene, open top water-storage tank specified here for water and general open-tank service, not as a rated container for aggressive chemicals. Do not assume open top means "any liquid." If your process later moves toward a heavier or reactive fluid, that is a different tank selection with different resin and specific-gravity requirements, so re-spec before you switch service.
This tank ships LTL freight from the Merced, CA plant, quoted live to your ZIP code. Because the minimum order is 6, each around 1,251 pounds full, your shipment moves as a multi-tank LTL load — plan receiving accordingly. Get a freight quote to your ZIP in seconds with our Freight Cost Estimator, or call 866-418-1777 to confirm the minimum order of 6, lead time, and freight before you order.
