The Chem-Tainer 125 Gallon Open Top Batch Storage Tank (part TC3630AA) is a cylindrical white open top tank built for batch mixing, holding, and short-cycle storage where you add product from the top, watch the level, and draw from the working volume. At 30 inches tall on a 36-inch diameter base, this is a low, stable open tank that fits under most fill lines and lets an operator reach in or drop in a mixer without fighting a tall sidewall. It is molded in natural white polyethylene so you can read the liquid level through the wall.
Will it work for your job?
The working capacity is 125 gallons in a 36.0 x 36.0 inch envelope, 30 inches high. Plan your stand and overhead clearance around those numbers. Filled with water, contents weigh about 1,042 lbs, so the pad or floor under this tank needs to carry roughly half a ton before you add the tank itself. The wall is molded to a 2.0 specific gravity rating, meaning the structure is rated to hold a batch up to twice the weight of water at the same volume, with a maximum rated contents weight of about 2,085 lbs. That high SG rating is the reason this open top suits heavier mixed batches, slurries, and dense solutions rather than just plain water. Use the Tank Sizing Calculator and the Tank Sizing Guide to confirm the 125-gallon working volume and headspace match your fill rate and batch size.
What it ships as, and the mistake to avoid
As listed, TC3630AA is a bare open-top vessel: it is filled from the open top and drawn from the working volume, with no bulkhead fittings, outlets, or gaskets pre-installed. If you need a bottom drain or a gasketed penetration, specify it before ordering and we will confirm what can be fitted. The bigger trap is treating the specific gravity rating as a free pass. The 2.0 SG rating describes the structural limit, not your contents. Weigh your actual batch: a 125-gallon batch at 2.0 SG approaches the 2,085 lb maximum rated contents weight, and overfilling a dense batch past that line stresses the wall. Because this is an open top design, it is meant for vented, atmospheric service, not sealed or pressurized storage, and the rim is open, so site it where splash, evaporation, and airborne contamination are acceptable or add a separate cover. As a batch and storage vessel it shows up in searches for an open top tank, white open top tank, and storage tank for exactly these reasons. If your contents are aggressive, confirm chemical compatibility against the resin before you commit.
Pad and placement
This tank performs best on a flat, fully supported surface. Size the slab to the full 36 x 36 in. envelope; the tank's contact is the 36 in. circular base, and it must sit on full support across that base rather than on a ring or partial bearing. For a permanent install, our guide on concrete pad sizing for above-ground polyethylene tanks walks through sizing the slab to the loaded weight. If this open top feeds a process from a larger train, the industrial water reuse tank topology guide covers staging batch and storage tanks in sequence; for fire-water staging in rural or remote service, see our fire-water reservoir tank design guide. See the technical drawing on this page for the dimensioned profile.
This tank ships LTL freight from West Babylon, NY, which is the only ship point, so buyers outside the Northeast should pull a ZIP quote early before committing. Get an exact number with the Freight Cost Estimator, or call 866-418-1777 and we will quote it and confirm the right tank for your batch.
