The Enduraplas 3100 Gallon Black Vertical Storage Tank is a polyethylene bulk-water vessel built for above-ground storage where you need real volume without spreading across your site. At 103 inches tall on a 100 x 100 inch base, this black vertical storage tank holds 3,100 gallons on a footprint of roughly 8.3 feet square, and it carries a 1.9 specific gravity rating, so the shell is engineered for liquids substantially heavier than water. The black resin blocks light to slow algae growth, which is why buyers searching for a black vertical storage tank for outdoor water service land on this configuration.
Will it work for your site?
Plan around the loaded weight, not the empty shell. Filled with water this tank carries roughly 25,854 pounds, and at its maximum rated contents it can reach about 49,123 pounds. That near-doubling is the 1.9 SG rating at work: the shell is rated for liquids up to about 1.9 times the density of water, which is why the contents rating is nearly twice the plain-water fill. Whatever you store, that weight has to land on a properly engineered, level foundation. Before you pour anything, walk the numbers in our concrete pad sizing guide, which frames above-ground poly tank pads against ACI 360R-10 and the ACI 318 boundary. If you are still deciding on capacity, the Tank Sizing Calculator and Tank Sizing Guide help you match gallons to draw-down and refill cycles. Review the technical drawing on this page for fitting locations and dimensional detail before you finalize plumbing.
Common applications
A 3,100-gallon vertical tank sits in the sweet spot for rural and remote water reserves. It works as a fire-water reservoir, a rainwater or industrial water-reuse holding vessel, and general bulk or process water storage. If fire protection is the goal, our guide to fire-water reservoir tank design covers NFPA 22 sizing discipline and freeze protection for cold-climate service. For reuse trains, the industrial water reuse tank topology guide walks grey-water, rainwater, and HVAC condensate aggregation, and the rainwater harvesting guide covers first-flush diverter sizing.
The mistake to avoid
The biggest error on a tank this size is treating the pad as an afterthought. Build the foundation to the loaded weight first, up to about 49,123 pounds at the tank's 1.9 SG rating, then set the tank; an uneven or under-built base invites uneven settling and shell stress. Second, do not undersize your connections for the pressure at the outlet, which is driven by the roughly 103-inch liquid column when the tank is full, not by gallons alone. Fitting sizes, outlet locations, and gasket requirements are not published in our data for this SKU, so confirm them on the technical drawing on this page or by calling before you order valves and fittings.
This tank ships LTL freight from the Enduraplas plant in Converse, TX, quoted live to your ZIP. Get your freight rate on our Freight Cost Estimator, or call 866-418-1777 to lock in freight and confirm lead time. We will help you match the right vertical storage tank to your site before it ever leaves the yard.
