6500 Gallon Vertical Liquid Storage Tank in Blue

The Norwesco 6500 Gallon Vertical Liquid Storage Tank in blue is a large-format polyethylene vertical storage tank standing 147 inches tall on a 120-inch diameter footprint. This SKU (N-42317) is 120 in dia x 147 in tall, molded as a single self-supporting cylinder for bulk liquid storage where you need real volume in one tank. Below are the three things that decide whether it fits your site: how it works, how it ships, and the one mistake to avoid.

Will it work for your application?

This is a 6500-gallon vertical tank molded from polyethylene with a 1.9 specific gravity rating, meaning the wall is rated to hold contents up to 1.9 times the weight of water. Filled with water, contents weigh about 54,210 lbs, and the tank is rated to a maximum contents weight of 102,999 lbs at the full 1.9 specific gravity. Use those numbers to plan your pad: this is a heavy, 120-inch-diameter tank whose base has to carry the entire loaded weight without settling. Run your volume and footprint through the Tank Sizing Calculator and the Tank Sizing Guide to confirm 6500 gallons on a 120-inch diameter is the right vertical storage tank for your site. Note that our 119 x 150 buyer's guide covers a different Norwesco configuration, so plan your pad to this tank's 120 x 147 footprint.

Pad and site planning

A vertical tank this size lives or dies on its foundation. The 120-inch footprint has to sit on a level, fully supporting pad that carries the loaded weight across the whole base, not just the perimeter. Our concrete pad sizing guide walks through the ACI 360R-10 framework for getting the base right. If this Norwesco tank is going into rural water or private fire-protection service, the fire-water reservoir design guide covers NFPA 22 sizing and cold-climate freeze protection for polyethylene tanks.

The one mistake to avoid

Don't over-fill this tank against its rating. The 1.9 specific gravity number is the ceiling: the wall is engineered for a full tank of a liquid up to 1.9 times heavier than water, not a license for any liquid. Water sits at 1.0, so plain-water service runs at about 54,210 lbs of the 102,999 lb rated capacity — wide wall margin, but the pad still has to carry the full loaded weight, and that is your binding constraint. The other mistake is ordering plumbing off a photo: the technical drawing on this page is the sole authority for port and outlet locations, sizes, and any gasket requirements. Verify those against the drawing before you buy fittings.

This tank ships LTL freight, quoted live to your ZIP from the nearest Norwesco plant — Albertville, AL or Fairfield, TX. Because a 54,210 lb (water) to 102,999 lb (rated) load is freight-dominated, get a real delivery number early with the Freight Cost Estimator, or call 866-418-1777 and we'll quote it for you. For deeper spec detail, compare our buyer's guides for the 120 x 147 natural-white variant and the 119 x 150 natural-white variant before you order.