The Enduraplas 3100 Gallon White Vertical Storage Tank (SKU THV03100W) is a molded polyethylene vertical storage tank built for bulk water and liquid storage where footprint and stability matter. It stands 103 inches tall on a 100 x 100 inch footprint, holds a nominal 3,100 gallons, and carries a 1.9 specific gravity rating, so it is rated to hold liquids substantially heavier than water. This is the tank people reach for when they search for a large white vertical storage tank that can anchor a water system without spreading across the yard.
Will this tank work for my site?
Start with weight, because that is what drives your pad and your placement. Filled with water, this tank carries about 25,854 pounds of contents; at its full 1.9 specific gravity rating it is engineered to hold up to roughly 49,123 pounds of contents. That is a serious static load on a 100 x 100 inch base (roughly 8.3 ft x 8.3 ft), so the tank needs to sit on a level, continuously supported foundation. For above-ground polyethylene tanks of this size, a properly sized concrete pad is not optional reading — our guide on concrete pad sizing for above-ground polyethylene tanks walks through the ACI 360R-10 framework so your foundation matches the load. If you are still deciding on capacity, the Tank Sizing Calculator and Tank Sizing Guide help you match gallons to demand before you commit.
Common uses and sizing notes
At 3,100 gallons this vertical tank is a natural fit for rural and remote water reserves, irrigation supply, and industrial water reuse trains. If you are building fire-water storage, our write-up on fire-water reservoir tank design for rural and remote sites covers NFPA 22 sizing discipline and cold-climate freeze protection. For grey-water, rainwater, and condensate aggregation, see our industrial water reuse tank topology overview, and if you are capturing rooftop runoff, our guide to rainwater harvesting and first-flush diverter sizing follows the Texas Manual on Rainwater Harvesting, 3rd Edition. One clearance note before you site it: the tank's overall height is 103 inches, so plan for headroom above the water column to reach the fill dome and manway and to run any overhead plumbing — measure to the full 103 inches, not just the liquid level.
The mistake to avoid
The most common error on a tank this size is treating the specific gravity rating as a license to skip foundation work. The 1.9 rating tells you the shell can hold heavy liquids, but it does not lighten the load on your ground — it means you may be putting up to 49,123 pounds of contents on that 100 x 100 inch footprint. Set it on unprepared soil or an undersized pad and you invite uneven settling. Prep the foundation to the full rated load, not just the water weight, and confirm the outlet and fitting arrangement against the technical drawing on this page matches your piping before delivery.
This tank ships LTL freight from the Enduraplas plant in Converse, TX, quoted live to your ZIP — get your freight rate with the Freight Cost Estimator, or call us at 866-418-1777 and we will price the haul and confirm fit for your application. Listed before freight; freight is quoted separately to your delivery ZIP.
