The Chem-Tainer 300 gallon vertical water storage tank in green (SKU TC3581IW-GREEN) is a polyethylene tank built for straightforward bulk water storage. It stands 81 inches tall on a 35-by-35-inch round footprint and holds 300 gallons at a full weight of roughly 2,502 lb. It carries a 1.0 specific gravity rating, the standard rating for fresh water, and the polyethylene is FDA approved for water-contact service, which is the reason to pick it over a non-rated utility tank for a potable or graded-reuse train. This is a true vertical storage tank: it carries its volume upward rather than out, so it claims a compact patch of floor for a haul-water reserve, irrigation supply, or rainwater collection point.
Does it fit your job?
At 35 inches across and 81 inches tall, this 300 gallon vertical storage tank works as a water-storage reserve where floor space is tight. The full water weight of about 2,502 lb is also the maximum rated contents weight, since the 1.0 SG rating is set for water. Plan a level, continuously supported pad rated for that load. To confirm this size matches your draw-down and refill cycle, run the numbers through our Tank Sizing Calculator or read the Tank Sizing Guide before you buy. The molded-in dimensions and outlet location are shown on the technical drawing on this page, so confirm the outlet and fitting size against that drawing before you plan your plumbing. For larger collection and treatment trains, the industrial water reuse and rainwater aggregation guide shows how a tank like this fits a quality-banded storage scheme, and for rural fire-protection reserves the fire-water reservoir design guide walks through NFPA 22 sizing discipline and freeze protection.
The mistake to avoid
This tank is rated for 1.0 specific gravity. That rating is correct for water and water-like fluids near a 1.0 density, and it is the line not to cross. If you are weighing a heavier liquid, a fertilizer concentrate, or any chemical with a specific gravity above 1.0, this is the wrong tank: the wall is sized for water, and overloading it with a denser fluid is the single most common error on a water tank purchase. For water duty at 1.0 SG, this Chem-Tainer is a correct match.
Freight
This 300 gallon tank ships LTL freight, quoted live to your ZIP code. Chem-Tainer molds at several plants, and your order ships from the location nearest you to keep freight down: Bensenville, IL; Hanford, CA; Hummelstown, PA; Lake Wales, FL; or Marked Tree, AR. Get a real number for your delivery address with our Freight Cost Estimator, or call 866-418-1777 and we will quote it by hand. If you are weighing build quality across brands at larger sizes, the Snyder vs Norwesco vs Chem-Tainer vertical storage tank comparison is worth a read. Need a slimmer profile that clears a gate or doorway instead of this round 35-inch body? That is a different tank entirely, covered in our 300 gallon green doorway water tank buyer's guide. Questions about fit or freight? Call 866-418-1777.
