Chem-Tainer 155 Gallon Plastic Open Top Batch Storage Tank with Cover

The Chemtainer 155-gallon open-top batch storage tank (SKU TC3636AA) is a cylindrical polyethylene vessel built for mixing, holding, and drawing down batches where you need full top access. It stands 36 inches in diameter and 36 inches tall, weighs just 60 pounds empty, and ships in Natural White. The open top is closed by a full-diameter cover, with a separate 8-inch lid opening for filling and sampling. The tank carries FDA and NSF 61 certifications and a 1.9 specific-gravity rating. If you have been searching "155 gallon chemtainer tank," "open top batch," or just "155 gallon tank," this is the cylindrical batch unit those searches point to.

Will it hold your batch

Filled with water, this tank carries roughly 1,293 pounds of contents; at its full 1.9 specific-gravity rating it is engineered for up to about 2,456 pounds of denser liquid. That headroom is the reason to choose an open-top batch tank over a lighter general-purpose drum: you can run heavier mixed solutions without exceeding the wall rating. Because it holds FDA and NSF 61 certifications, it is suited to potable-water and food-contact batching, not just industrial mixes. The maximum service temperature is 120°F (48°C), so keep hot fills below that line. The footprint is a compact 36-inch circle, which makes pad layout and containment sizing straightforward. If you are still deciding between capacities, run your numbers through the Tank Sizing Calculator or read the Tank Sizing Guide before you commit.

The mistake to avoid

This is an open-top tank with a lift-off cover, not a sealed or pressurized vessel, and it ships with no pre-installed side outlet or fittings. Plan on top-access mixing and gravity or dip-out draw-down; do not plumb it as a closed system or expect the cover to seal against vapor, pressure, or splash-out during agitation. Confirm your process temperature stays under the 120°F ceiling, and verify the 1.9 SG rating covers the density of whatever you are batching before you fill it. At 60 pounds empty, one or two people can set it in place before filling, so stage it exactly where you want it first. Check the technical drawing on this page for exact dimensions and the cover and lid openings.

Freight

This tank ships LTL from Chemtainer's Hanford, California plant, freight quoted live to your ZIP rather than bundled into the list price. Get an exact number in seconds with the Freight Cost Estimator, or call us at 866-418-1777 and we will walk your delivery through. Planning a permanent install on a slab? The guide on concrete pad sizing for above-ground polyethylene tanks covers the base you will want under a filled 155-gallon load.