The Norwesco 11000 Gallon Black Heavy Duty Vertical Storage Tank is built for high-volume bulk water duty where one large reservoir beats a row of smaller tanks. It holds 11,000 gallons in a single black polyethylene body, stands 167 inches tall on a 144 in (12 ft) diameter, and carries a 1.9 specific gravity rating - the heavy-duty part of the name. That SG rating means the tank is engineered to hold contents far denser than water, so for plain water storage you have substantial structural margin to spare.
Spec snapshot
- Capacity: 11,000 gallons
- Height: 167 in (just under 14 ft)
- Diameter / footprint: 144 in (12 ft) - plan a minimum 12 ft square pad
- Material: Black polyethylene
- Specific gravity rating: 1.9 (heavy duty)
- Full water weight: ~91,740 lb
- Max rated contents weight: 174,306 lb at 1.9 SG
- Ships from: Albertville, AL
Will it work for your site?
Run the numbers before you pour a pad. Filled with water this vertical storage tank weighs about 91,740 pounds, and its maximum rated contents weight at the 1.9 SG rating is 174,306 pounds. Over a 12 ft circular base (roughly 113 square feet) that works out to about 810 lb/ft of bearing pressure for water, and near 1,540 lb/ft at the full 1.9 rating - hand those figures to your concrete contractor. The black resin blocks light, which suppresses algae growth in stored water, a practical reason to choose black over a lighter color for long-term outdoor water reserves. If you are still deciding between this capacity and another, the Tank Sizing Calculator and Tank Sizing Guide help you match capacity to demand before you commit.
Foundation and large-volume planning
A tank this heavy lives or dies on its base. At roughly 91,740 pounds full of water - and far more at its rated contents weight - the pad under it has to be engineered, level, and continuously supported, not improvised. Our guide on concrete pad sizing for above-ground polyethylene tanks walks through the ACI 360R-10 framework and where the ACI 318 boundary applies. For fire-protection reserves, the fire-water reservoir tank design guide covers NFPA 22 sizing discipline and freeze protection for cold-climate service. If this tank anchors a reuse system, the industrial water reuse tank topology guide shows how grey-water, rainwater, and HVAC condensate aggregate into quality-banded storage trains.
The mistake to avoid
Do not underestimate the freight and rigging side of an 11,000-gallon tank. This is an oversize unit that requires equipment to offload and set - confirm site access for the delivery truck and have your placement crew and pad ready before it arrives. Confirm outlet size, fitting locations, and gasket requirements from the technical drawing on this page before ordering bulkhead fittings or mating flanges, so your plumbing and pad layout are finalized before delivery, not after the tank is sitting on site.
This tank ships LTL freight from the Norwesco plant in Albertville, AL, with cost quoted live to your ZIP code. Get a number with the Freight Cost Estimator, or call 866-418-1777 and we will quote it for you and answer any questions about setting a tank this size.
