Underground Water Storage Tanks | Reliable Plastic Units

Underground Water Storage Tanks

Plastic Underground Tanks

Underground Water Storage TankUnderground water storage tanks are designed to provide you with a firm and stable chamber for storing potable water. When storing water beneath the ground, concern over materials such as sediment contaminating your supply is a legitimate problem. To address this issue, these plastic below ground tanks are made with the same design as a septic tank. This gives them the required strength and water holding ability needed for this type of storage.

These underground tanks are primarily used for storing drinking water, collecting and retaining rainwater, and fuctioning as a water irrigation system. Their lightweight nature makes them easy to move when installing, while their low profile design allows them to feat neatly under a home, cabin, or on a construction site. View more Plastic Water Tanks and our tank selection guide.

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  • Covers Lock to Seal Tank
  • Rugged Exterior in Ribbed Design
  • Constructed with only one Piece of Polyethylene
  • Complies with FDA 21 CFR 111.150 (c) 3.1 and 3.2


  • Difficult for Water to Escape the Tank
  • Lightweight for Swift Mobility
  • Easy to Install
  • No Seams for Cracks or Leaks
  • Can Store Drinking Water or Rainwater
  • Could Function as a Cistern
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Underground Storage Tank
Part Number Capacity (gallons) Size
 TN5451WT    325    54D x 51  
 TN6464WT    550    64D x 64  
 TN600XWT    600    101 x 51 x 58  
 TC1000WT    1000    86 x 65 x 68  
 TN1200WT    1200    102 x 60 x 58  
 TC1250WT    1250    86 x 76 x 68  
 TN1700WT    1700    143 x 55 x 66  

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