The Norwesco 15500 Gallon Black Heavy Duty Vertical Storage Tank is built for serious bulk water storage, holding 15,500 gallons in a single black polyethylene vessel rated to 1.9 specific gravity. At 244 inches tall on a 141 x 141 inch footprint, this is a large-capacity vertical storage tank, and the opaque black resin blocks light transmission through the wall for long-term outdoor service. Whether you are sizing for fire-water reservoir capacity, agricultural water, or industrial process storage, this Norwesco vertical storage tank covers high-volume needs in one footprint.
Specifications at a glance
- Capacity: 15,500 gallons
- Height: 244 in
- Footprint: 141 x 141 in (square)
- Color / material: Black polyethylene
- Specific-gravity rating: 1.9
- Lid: 22 in (technical drawing on this page is revised for the 22" lid)
- Ships from: Hanford, CA
Will it work for your site?
This is a vertical storage tank with a 22-inch lid. The footprint is square at 141 x 141 inches, so plan your pad to the full footprint. The numbers that matter most for a tank this size are the loaded weights: filled with water it carries roughly 129,270 lb, and at its full 1.9 specific-gravity rating the contents alone can reach 245,613 lb. That is a structural load, not a rounding error - your foundation has to be engineered for it. The 1.9 specific-gravity rating is meaningful headroom: it carries water (SG 1.0) with a wide margin and is rated for denser fluids up to 1.9 SG, well above the standard 1.5 rating, so you have density room as your application grows. Use the Tank Sizing Calculator and Tank Sizing Guide to confirm capacity against your draw schedule, and review our guide on concrete pad sizing for above-ground polyethylene tanks before you pour. For rural fire-protection storage, the fire-water reservoir design guide walks through NFPA 22 sizing discipline and freeze protection.
The mistake to avoid
The single most common error on a tank this large is treating it like a small poly tank and skipping the foundation engineering. With 245,613 lb of potential contents load, a flat or under-built pad will fail before the tank ever does. The 1.9 specific-gravity rating tells you the wall can handle dense contents - it does not tell you your ground can. Confirm the pad is level, full-footprint, and rated for the loaded weight. The other detail to lock down is the openings: our data lists the 22" lid, but no outlet or bulkhead fitting is specified, so confirm fitting layout - size and placement - with our team at 866-418-1777 before ordering. Any vented manway lid, screen, or gasketed accessory must match the 22" opening, and a properly seated lid gasket is required for a weather- and debris-tight seal outdoors.
Reuse and high-volume water storage
At 15,500 gallons this Norwesco vertical tank fits water-reuse and aggregation trains where you are banking grey-water, rainwater, or HVAC condensate before treatment. See industrial water reuse tank topology for staging quality-banded storage, and the first-flush diverter sizing guide if you are feeding it from a roof catchment.
This tank ships LTL freight from the Norwesco plant in Hanford, CA, quoted live to your ZIP. Because it stands 244 inches tall, it moves as an oversized LTL load - have three things ready for the tightest quote: your delivery ZIP, site access (truck and turn-radius clearance), and your offload plan (it ships empty, but plan crane or equipment for placement). Get your number with the Freight Cost Estimator or call 866-418-1777. Questions on lid configuration, fitting layout, pad requirements, or scheduling delivery? Reach our team at 866-418-1777.
