The Chem-Tainer 300 gallon vertical water storage tank in black is built for outdoor bulk water storage where UV exposure and algae control matter. It stands 81 inches tall on a compact 35 x 35 inch footprint, so it slots into tight pump-house corners, equipment pads, and the side of a barn or shop without sprawling. Molded from polyethylene and rated to 1.0 specific gravity, it is purpose-built to hold water - that is exactly the service it is engineered for.
Will this tank work for your job?
The numbers a buyer actually checks: 81 in tall, 35 in diameter, 35 x 35 in footprint, and 2,502 lb when full of 300 gallons of water. Measure your doorway, gate, and pad against those before you order. The pad or slab underneath has to be flat, level, and rated to carry the full load - a vertical water tank set off-level puts uneven stress on the sidewall, and at over 2,500 pounds full that is not a margin to gamble on, so cure your concrete and check it with a level before you fill. The 81-inch height also makes this a strong fit for gravity-feed setups: the taller the column of water, the more head pressure you get at the outlet for stock watering, irrigation, or a rural fire-water reservoir. If you are not certain 300 gallons matches your draw rate and refill cycle, run the numbers through our Tank Sizing Calculator and the Tank Sizing Guide before you commit.
Why black, and where it fits
The black wall blocks sunlight from passing into the water, which suppresses the algae growth that plagues translucent and lighter tanks left out in the sun. That makes this a sensible pick for fire-water and emergency reserves, livestock and irrigation supply, rainwater and graywater holding, and any water storage application where you want the contents to stay cleaner sitting in the open. If you are designing a private fire-protection reserve, our guide on fire-water reservoir tank design for rural and remote sites covers NFPA 22 sizing and freeze protection. For reuse trains, see our breakdown of industrial water reuse tank topology across grey-water, rainwater, and condensate aggregation. Confirm the molded fitting locations on the technical drawing on this page before you plumb your supply and draw lines.
The mistake to avoid
This tank is rated for 1.0 specific gravity - water-weight contents only. Do not press a water-grade vertical tank into chemical or heavier-than-water service; products that weigh more than water per gallon need a higher specific-gravity tank built for that load, and ignoring the SG rating is the fastest way to overstress a sidewall and shorten the tank's life. Keep this one on water and it will earn its keep. If you are weighing Chem-Tainer against the other major polyethylene makers, our Snyder vs Norwesco vs Chem-Tainer comparison lays out the brand-level differences (written up on a 2000 gallon vertical, but the build and material distinctions carry across sizes).
This 300 gallon vertical water storage tank ships LTL freight, quoted live to your ZIP from the nearest stocking plant - Chem-Tainer molds from Bensenville, IL; Hanford, CA; Hummelstown, PA; Lake Wales, FL; and Marked Tree, AR, so your rate depends on which plant is closest to you. Get an exact number now with our Freight Cost Estimator, or call us at 866-418-1777 and we will quote the freight and answer any sizing questions before you order.
