The Norwesco 15500 Gallon Green (California Only) Water Storage Tank is a vertical polyethylene tank built for large-volume bulk water storage where one tank has to hold serious capacity. Note the region constraint up front: the green color is offered only in California, and this tank ships from the Norwesco plant in Hanford, CA, so it is effectively a California-region product. At 15,500 gallons it stands 244 inches tall on a 141 x 141 inch footprint and carries a 1.0 specific gravity rating. That rating means it is built for water and water-density liquids only (SG at or below 1.0); this is a water storage tank, not a chemical tank.
Pre-purchase go/no-go checklist
A tank this size needs its site confirmed before you order. Check three things against the pack numbers: (1) at least 244 inches of vertical clearance, including room to stand it up on delivery day; (2) a level, engineered pad sized for the 141 x 141 inch footprint and the fully loaded weight; and (3) confirmed site access for an LTL delivery of a tank this large. Run the load and dimensions through our Tank Sizing Calculator and Tank Sizing Guide, and get the base right the first time with our guide to concrete pad sizing for above-ground polyethylene tanks.
Fittings and load
Filled to capacity this tank carries 129,270 pounds of water, which is also its maximum rated contents weight at 1.0 specific gravity. That is the number your foundation has to be engineered around. On fittings, the only detail confirmed by the current drawing revision is a 22-inch manway lid. Outlet count, size, and placement are not confirmed in our data, so verify every outlet and bulkhead against the technical drawing on this page, or call 866-418-1777, before you plan your plumbing.
How buyers use it, and the mistake to avoid
A 15,500-gallon vertical tank is a workhorse for rural fire-water reserves and industrial water reuse trains. If you are sizing a private fire-protection reservoir, our fire-water reservoir tank design guide covers NFPA 22 sizing and freeze protection; for grey-water, rainwater, and HVAC condensate aggregation, see our industrial water reuse tank topology guide. The biggest error on a tank this large is filling it before the pad and site are ready. Do a controlled water-fill acceptance test, monitor pad settlement, and check fittings for leaks as the level rises, as walked through in our hydrostatic test methodology guide.
This tank ships LTL freight from Hanford, CA, quoted live to your ZIP. Because the origin is fixed in Central California, delivered freight scales with distance, so West Coast ZIPs will quote materially better than distant ones. Get a quote with our Freight Cost Estimator, or call 866-418-1777 and we will help you size, spec, and route it.
