The Chem-Tainer 100 Gallon Plastic Portable Flat Bottom Utility Tank is a compact white polyethylene tank built for mobile and stationary water duty where a low, stable footprint matters more than height. Measuring 26 in H x 26 in W x 42 in L, it sits low enough to load onto a truck bed, trailer, or skid and still keep its center of gravity down when full. Whether you searched for a 100 gallon utility tank, a 100 gal portable tank, or simply a Chem-Tainer 100, this is the flat-bottom workhorse that fits that brief.
Will it work for my job?
This tank is molded from FDA-approved polyethylene, which makes it suitable for potable and drinking-water transport and storage, not just generic water duty. It holds 100 gallons in a single molded shell with a 1.5 specific gravity rating and a 26 by 42 inch flat bottom that gives it a broad, self-supporting base, so it does not need a contoured cradle the way a cone-bottom or elliptical leg tank does. Filled with water, the contents alone weigh about 834 pounds. The 1.5 SG rating is what buys you headroom: the tank is rated to carry contents up to 1,251 pounds, meaning it legally holds fluids up to 1.5 times water density, so the same tank covers denser solutions like fertilizer or brine down the road rather than water alone. For rural fire-suppression storage, the volume and footprint also suit a small reservoir role; our guide on fire-water reservoir tank design under NFPA 22 covers that application. Before you finalize placement, run your numbers through the Tank Sizing Calculator and review the Tank Sizing Guide to confirm 100 gallons matches your refill cycle and water demand.
How it ships
This tank ships LTL freight from Marked Tree, Arkansas, the named plant for this model, with freight quoted live to your ZIP code. Because flat-bottom utility tanks are bulky relative to their weight, LTL is the standard mode rather than parcel. Pull a real number for your delivery address with the Freight Cost Estimator, or call 866-418-1777 and we will quote it for you over the phone.
The mistake to avoid
The most common error on a portable utility tank is treating that low, broad footprint as if it is fully self-supporting on any surface. It is self-supporting, but a flat-bottom tank still transfers all 834-plus pounds of full water weight straight down into whatever it sits on. On a bed or trailer, strap it down and back it against a bulkhead so it cannot shift under braking; on the ground, give it a level, continuous surface. If you are setting it on a slab, our guide on concrete pad sizing for above-ground polyethylene tanks walks through the support requirements. For mobile farm-fleet hauling, the breakdown of portable utility tank DOT classification under 49 CFR 173.5 is worth reading before you put it on the road. Confirm your fill and outlet specs against the technical drawing on this page, then get your freight quote with the Freight Cost Estimator or call us at 866-418-1777.
