The Enduraplas 3100 Gallon Black Vertical Water Storage Tank (SKU TLV03100B) is a polyethylene vertical tank built for bulk water storage where you need real volume in a square footprint. It stands 103 inches tall on a 100-inch by 100-inch base, holds 3,100 gallons, and carries a 1.1 specific gravity rating - meaning the wall thickness is engineered for liquids up to 10 percent heavier than fresh water. The black color blocks light, which slows algae growth in stored water far better than translucent or lighter tanks.
Will this tank work for your site?
Plan around the loaded weight, not just the empty shell. Filled with plain water this tank carries roughly 25,854 pounds, which is the design load that matters for water service. Its maximum rated contents weight is about 28,439 pounds - the ceiling at the 1.1 specific gravity rating - so if anything denser than water is ever stored, the pad has to be sized to that higher figure. Either way, that load lands on a level reinforced concrete pad over a 100.0 x 100.0 inch footprint. Before you pour, work through our Concrete Pad Sizing for Above-Ground Polyethylene Tanks guide, which walks the ACI 360R-10 framework and the ACI 318 boundary so the pad matches this tank's bearing load. If you are still settling on capacity, the Tank Sizing Calculator and Tank Sizing Guide help you match a vertical storage tank to your daily draw and refill cycle.
Common applications and what to verify
A 3,100 gallon vertical tank in black is a workhorse for rural and remote water storage, fire-water reserve, and industrial water reuse. For private fire protection, the reservoir has to be sized to a real standard rather than a round number, and in cold climates the black shell still needs freeze protection planned around it - our Fire-Water Reservoir Tank Design guide covers NFPA 22 sizing discipline and freeze-protection engineering for cold-climate service. If you are aggregating grey water, rainwater, or HVAC condensate, the Industrial Water Reuse Tank Topology guide explains quality-banded storage trains. Fitting locations and sizes are not standardized on this model from the listing data - confirm the outlet and any bulkhead fittings against the technical drawing on this page, or call us at 866-418-1777 before you plumb it.
The mistake to avoid
The biggest first-fill error is skipping a controlled acceptance test. Do not slam this tank from empty to full and walk away. Fill it in stages, watch the pad for settlement, and check every fitting for leaks while the water level rises. Our Hydrostatic Test Methodology guide lays out the water-fill discipline, pad-settlement monitoring, and hold-time math so the first fill becomes your acceptance test instead of your first failure.
This tank ships LTL freight from the Enduraplas plant in Converse, TX, quoted live to your ZIP - get your number with the Freight Cost Estimator or call 866-418-1777. At more than 100 inches in every dimension and a full water load over 25,000 pounds, plan delivery access and offload equipment in advance so the tank lands clean on its pad.
