The 175 Gallon Plastic Water Storage Tank from Norwesco is a black polyethylene vertical water tank standing 64 inches tall on a 30-inch-diameter footprint, rated to hold 175 gallons. It is built for water storage where vertical floor space is at a premium and a compact base keeps the tank stable on a small pad.
Will this tank work for your application?
This is a vertical storage tank with a specific gravity rating of 1.1, meaning the wall is engineered to carry contents up to 1.1 times the density of water. For straight water storage that gives you comfortable headroom: a full tank of water weighs 1,460 pounds, and the tank is rated for contents up to 1.1x water density, or 1,605 pounds, about 145 pounds above a full water load. That margin suits water storage, livestock and irrigation supply, rainwater collection, and rural water hauling. One guardrail: do not put liquids heavier than 1.1x water in this tank, because most concentrated chemicals exceed that ceiling and need a higher-SG-rated tank. Call 866-418-1777 if you are storing anything other than water and we will confirm the right tank.
Sizing and siting the pad
Because a full tank concentrates 1,460 pounds of water onto a 30-by-30-inch base, the pad underneath has to be level, continuously supported, and rated for that load. At full rating, 1,605 pounds bears on 6.25 square feet, roughly 257 pounds per square foot, which is the number to hand your concrete contractor. Our Tank Sizing Calculator and Tank Sizing Guide help you confirm 175 gallons matches your draw and refill cycle, and our guide on concrete pad sizing for above-ground polyethylene tanks walks through building a base that carries the full load without settling.
The mistake to avoid
The most common error with a tank this size is filling it before the pad has settled and before the connections have been leak-checked. Fitting and lid configuration is not specified in our catalog data for this SKU, so confirm the exact bulkhead, outlet, and lid layout with us at 866-418-1777 before you plumb it, and check the technical drawing on this page. Set the tank on its prepared base, then fill it with water and hold it to watch for pad movement and weeping at every connection before you put it into service. Our hydrostatic test methodology guide lays out the fill discipline, settlement monitoring, and hold-time math for accepting a new install. If this tank will feed a rural fire-protection reservoir, our fire-water reservoir design guide covers NFPA 22 sizing and cold-climate freeze protection.
Dimensions are 64 in H x 30 in dia, and this water storage tank ships LTL freight from the Norwesco plant in Burnet, Texas, with freight quoted live to your ZIP code. Get an exact number with our Freight Cost Estimator, or call 866-418-1777 and we will quote it for you. Listed price is before freight.
3 Year Warranty
