The Enduraplas 6250 Gallon Black Vertical Storage Tank (SKU THV06250B) is a bulk-scale polyethylene reservoir built for large-volume water and non-potable liquid storage. Molded from black polyethylene, it stands 147 inches tall on a 120 x 120 inch square footprint and carries a 1.9 specific gravity rating - the top SG rating for this unit, meaning it holds liquids denser than water as well as plain water with no step-up tank needed up to its weight ceiling. Black PE blocks light to suppress algae growth and is intended for non-potable service. If you have searched for a black Enduraplas vertical storage tank in this size class, this is the unit that answers that requirement without stepping down in capacity.
Will it work for your site?
Full of water, the 6250-gallon volume weighs about 52,125 lb, and the tank is rated to hold contents up to 99,038 lb - the margin between those two figures is what the 1.9 SG rating buys you for denser fluids. On the 120 x 120 inch footprint (14,400 square inches), that ceiling works out to roughly 6.9 psi average bearing pressure fully loaded, versus about 3.6 psi water-full - hand those average figures to whoever pours your slab. The 147-inch height decides the vertical clearance you need under any roof or canopy. Because point loads at this scale are unforgiving, size the pad deliberately - our concrete pad sizing guide (ACI 360R-10 framework) walks through the engineering boundary, and the Tank Sizing Calculator and Tank Sizing Guide help you confirm the volume matches your draw and refill cycle before you commit. Review the technical drawing on this page for confirmed dimensions.
Common uses at this capacity
A 6250-gallon vertical tank sits in the range where a single reservoir replaces a cluster of smaller tanks - rural and remote fire-water storage, industrial process water, and reuse or aggregation trains. If fire protection is the driver, the fire-water reservoir design guide (NFPA 22 sizing) covers stored-volume discipline and cold-climate freeze protection. For grey-water, rainwater, and HVAC condensate aggregation, the industrial water reuse topology guide maps how a bulk tank this size fits a quality-banded storage train.
The mistake to avoid
The most common error on a tank this large is under-building the foundation and ignoring the height. Design the pad for the 99,038 lb ceiling if you will ever store a dense fluid - not the ~52,125 lb water-full weight, and not the empty shell. At 147 inches tall, a marginal or unlevel pad is the single biggest cause of premature failure. One more gap to close before you plumb it in: fitting and outlet sizes and positions are not published for this SKU - confirm the port schedule with us at 866-418-1777 before you spec bulkhead fittings or gaskets.
This tank ships LTL freight from the Enduraplas plant in Converse, TX, with the exact cost quoted live to your ZIP - use our Freight Cost Estimator for a freight quote to your ZIP, or call 866-418-1777 and we will build the quote with you. Listed price is before freight.
