The Norwesco 250 Gallon Black Vertical Storage Tank (SKU 43127) is a 250-gallon polyethylene vertical tank built for general water storage and bulk liquid holding where floor space is tight. It stands 89 inches tall on a 30-by-30-inch base, so it holds a full 250 gallons in a column that takes up just two and a half feet of floor in either direction. The black exterior blocks light, which keeps algae growth down compared with a translucent tank. Its molded-in 1.5 specific gravity rating means the wall is engineered to hold liquids up to 50 percent denser than water, giving you margin for water plus dissolved solids or brine within that rating.
Specifications at a glance
Capacity: 250 gallons. Dimensions: 89 in height x 30 in diameter (30 x 30 in footprint). Full-water weight: about 2,085 lb. Maximum rated contents weight at 1.5 SG: about 3,128 lb. Color: black. Material: polyethylene. Specific gravity rating: 1.5. Use these numbers to check your pad rating before you order.
Will it work for your storage
Plan your pad and supports around real loaded weight. At 250 gallons of plain water the tank carries roughly 2,085 pounds full, and because the wall is rated to 1.5 specific gravity it is built to handle contents weighing up to about 3,128 pounds at that maximum - useful headroom if your liquid runs heavier than water, anywhere in the 1.0 to 1.5 SG band. A 30-by-30-inch footprint concentrates that load, so a level, continuous, load-rated base is not optional. Convert your fluid's specific gravity into actual loaded weight with the Tank Sizing Calculator, and use the Tank Sizing Guide before you lock in a tank height and diameter. For the pad itself, the concrete pad sizing guide walks through the engineering framework for an above-ground polyethylene tank.
Common applications and freeze protection
A tall, narrow 250-gallon vertical tank suits rural and remote water storage, supplemental supply, and reserve volume where space is at a premium. If it is part of a private fire-protection setup, the fire-water reservoir design guide covers NFPA 22 sizing discipline and cold-climate freeze protection. For sites aggregating grey-water, rainwater, or HVAC condensate, the water reuse tank topology guide and the rainwater harvesting guide cover storage trains and first-flush diverter sizing.
The mistake to avoid
The most common error with a tall vertical tank is treating the footprint as forgiving. At 89 inches of height on a 30-inch base this is a top-heavy column when full, so it must sit on a level, fully supported pad and, in exposed or elevated locations, be secured against wind and seismic movement. Do not read the 1.5 specific gravity rating as permission to store any liquid; that figure governs allowable contents density, not chemical resistance - confirm your liquid is compatible with polyethylene and stays within the 1.5 SG ceiling before filling. Fitting configuration - outlet size, lid, and vent - is not assumed; confirm it against the technical drawing on this page and size your gaskets and bulkhead hardware to the drawing's actual port before you order.
This tank ships LTL freight and is produced at multiple Norwesco plants - Fairfield, TX; Griffin, GA; Hanford, CA; Owego, NY; Shawnee, OK; Sheldon, IA; St. Bonifacius, MN; Tooele, UT; Washington Court House, OH; and Washougal, WA. The originating plant and the actual freight cost are confirmed at quote time for your ZIP, not by proximity alone. Get a live rate with the Freight Cost Estimator, or call 866-418-1777 and we will quote it for you.
