Enduraplas water storage cistern tanks and septic tanks are designed specifically to store liquids underground. Every below ground tank we manufacture is quality tested and comes standard with an industry-leading 10-year warranty. Used in several industries, these one-compartment and two-compartment underground tanks are ideal for safely storing wastewater, fresh water, potable water and more. They also work great with water irrigation systems, rainwater harvesting systems and fire suppression systems. All our underground cistern tanks are FDA-approved and BPA-free making them the preferred choice for storing water that will be used for drinking and other applications where clean, potable water is needed. Compared to underground concrete tanks, these holding tanks are light weight, easy to transport and quick to install. Best of all, because of their low profile, the hole you dig does not have to be as deep.