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3731 Northcrest Rd, Suite 28, Atlanta GA 30340             404-991-0404​

Underground plastic Cisterns &
​Water Storage Tanks 


The strength and versatility of Infiltrator underground cisterns enable a wide range of installation possibilities, including shallow installations and multiple and serial tank configurations. Both the standard and potable IM Series offer the quickest installations in the residential rainwater harvesting industry. Other benefits include:

  • Lightweight construction allows for easy storage and delivery
  • Clamshell design allows stacking of up to 7 tanks, minimizing freight costs
  • Reinforced lid and access ports
  • Stable when the tank is dry
  • Approved for installation with 6 to 48 inches of soil cover
  • Available for in NSF-61 approved materials for potable water storage

Perfectly Matched with the Purain Prefilter

These water storage tanks work especially well with the 4" Intewa Purain prefilters. The low invert of the Purain allows in-tank installation and maximum utilization. The Purain has a built-in skimming overflow, so a second outlet connection is not required. And the Purain screen will be below the water level when the tank is full, which provides additional cleaning. Finally, the 4" Purain is sized for a 1500 s.f. roof, which is a also a good size for the 1787 gallon tank, using the 1:1:1 ratio.

Available Sizes

 The Infiltrator IM Series underground cistern is available in 1787, 1280, and 550 gallon sizes.