The 12000 Gallon Plastic Water Storage Tank from Norwesco is a vertical polyethylene tank standing 193 inches tall on a 141-inch-diameter footprint, built for bulk water storage where one large reservoir beats a manifold of smaller tanks - municipal-adjacent supply, agricultural irrigation reserve, fire-water reserve, and process-water buffering. At this volume the numbers are what matter, so here is how it works, how it ships, and the one thing most buyers get wrong on a tank this size.
How it works
This is a 12,000-gallon vertical water storage tank molded in polyethylene with a specific gravity rating of 1.0 - the rating for water and water-like fluids at standard density. Filled to capacity it holds 100,080 pounds: the full water weight and the maximum rated contents weight are the same 100,080 lb because this shell is rated for 1.0 SG service. That rating is also the qualifier - it covers potable and non-potable water and water-like fluids at standard density. For anything heavier than water, such as fertilizer solutions, brine, or many chemicals, a 1.0 SG model is not the right shell; that service calls for a heavier-rated vertical (1.5 or 1.9 SG) rather than filling a 1.0-rated tank with a denser fluid. The cylindrical body sits on a 141-inch (11.75-foot) diameter base, and the 193-inch overall height puts the top better than 16 feet up, so plan fill access, vent, and level-sensing around that reach.
Sizing and the pad underneath it
A vertical storage tank of this footprint loads its pad with more than 100,000 pounds when full, so the foundation is not an afterthought - it is the install. Before ordering, confirm the unit physically fits and can be set: a pad at least 12 feet wide plus working clearance, at least 16 feet of vertical clearance for the set, and an overhead-obstruction check for crane or gantry access. Work the volume and footprint against your site with the Tank Sizing Calculator and the Tank Sizing Guide, and design the slab for the full contents weight using the framework in Concrete Pad Sizing for Above-Ground Polyethylene Tanks. If this reservoir is part of a private fire-protection stack, the Fire-Water Reservoir Tank Design guide covers NFPA 22 sizing discipline and freeze protection; for grey-water, rainwater, and condensate aggregation, the Industrial Water Reuse Tank Topology guide maps the storage train. The exact fill inlet, gravity-feed outlet, bulkhead size, and gasket schedule are shown in the technical drawing on this page - spec your manifold and valves to those fittings before the install.
The mistake to avoid
The error on a tank this large is commissioning it the day it arrives. Polyethylene tanks need to be filled with water and held - settling on the pad reveals leveling problems and lets you check every fitting for leaks before the tank is in service carrying six figures of weight. Follow the discipline in the Hydrostatic Test Methodology guide: fill with water, monitor pad settlement, detect fitting leaks, and observe the hold time before you trust it. Catching a leveling or fitting issue on a controlled test fill is straightforward; catching it after the reservoir is full and in service is not.
This tank ships LTL freight, quoted live to your ZIP from the nearest of two Norwesco plants - Fairfield, TX or Hanford, CA - which materially changes the cost on a 141-inch-diameter unit depending on where you are. Get a real number to your delivery address with the Freight Cost Estimator, or call 866-418-1777 to talk it through with someone who knows how a 12,000-gallon vertical storage tank actually gets delivered and set.
3 Year Warranty
