The Enduraplas 210 Gallon Dark Green Vertical Water Storage Tank is a polyethylene vertical tank built for above-ground non-potable water storage where you need real capacity without a large footprint. It holds 210 gallons in a tank that stands 48 inches tall on a square base that measures 40 inches wide by 40 inches deep, so it fits tight pad spaces, equipment yards, and the corner of a pump house while still giving you usable on-site reserve. The dark green color cuts light penetration to slow algae growth in outdoor service, which is why this Enduraplas vertical storage tank is a common pick for rainwater holding, irrigation supply, and rural water storage tank duty.
Will it work for your job?
This is a 210-gallon vertical water tank rated to a specific gravity of 1.1, meaning the polyethylene wall is engineered for contents up to 1.1 times the density of water. Plain water sits at 1.0, so you have headroom for water plus typical dissolved solids. Filled to capacity, the water alone weighs about 1,751 pounds, and the tank is rated for a maximum contents weight of 1,927 pounds. That 1,927 lb figure already reflects the 1.1 SG ceiling, so it is your design load, not a number to stack additional dense contents on top of. Plan your pad and tie-downs around that loaded weight, not the empty shell. The square 40 by 40 inch footprint is what your concrete pad or compacted base needs to fully support, edge to edge. Review the technical drawing on this page for the dimensional layout before you set it, and use our Tank Sizing Calculator and Tank Sizing Guide if you are still confirming whether 210 gallons matches your draw-down and refill cycle.
Setting it up the right way
A vertical water tank lives and dies by its base. This is a standalone vertical storage tank with no integral containment, so a level, fully supporting foundation across the entire 40 by 40 inch footprint is on you; a partial or uneven pad concentrates that 1,900-plus pounds of loaded weight on a few points and stresses the wall. Our guide on concrete pad sizing for above-ground polyethylene tanks walks through the ACI 360R-10 framework for getting that base right. Once it is installed, run a controlled water fill and watch for pad settlement and fitting leaks before you put it into service; the hydrostatic test methodology for new-install tank acceptance guide covers fill discipline and hold-time math. If this tank is part of a rural fire reserve or a water-reuse train, our writeups on fire-water reservoir design and industrial water reuse tank topology show how a storage tank this size fits the larger system.
The mistake to avoid
The most common error on a tank this size is treating the 1.1 specific gravity rating as a green light for anything heavier than water. It is not. This is a water storage tank; the 1.1 rating gives you margin over plain water, but it is not a chemical-service spec. If your contents are denser than 1.1 SG, you need a tank rated for that higher density, not this one, so confirm your fluid before you order. The second mistake is under-building the pad. Size the foundation for the full 1,927-pound rated contents weight, support the complete square 40 by 40 inch base, and you will get long, trouble-free service from this vertical storage tank.
This tank ships LTL freight from the Enduraplas plant in Converse, TX, so a buyer on the coasts can gauge transit distance before pricing it out. Freight is quoted live to your ZIP code rather than bundled into the listed price. Get an exact number with our Freight Cost Estimator, or call us at 866-418-1777 and we will quote it for you and help confirm this is the right size and rating for your water storage job.
