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Underground Water Storage Tank

Potable Water Cistern

underground water storage tank

Plastic Underground Water Storage Tanks are an economical option for below ground water storage. Safe for holding and storing a range of water types, these potable water cisterns have been used as drinking water holding tanks, rainwater cisterns, and even gray water storage tanks. All underground poly tanks are built with interior resisns that meet FDA requirements for the safe storage of potable water.

Due to the demanding nature of below ground storage, plastic underground tanks are made with a ribbed design that increases the strength and storage potential of the tanks. Each potable water cistern is sized to hold up to 1600 gallons of water.

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For pricing information, please check out these products in our Plastic Water Tanks Web Store.



  • Made from One Piece of Seamless Polyethylene
  • Ribbed Exterior
  • Self Locking Covers
  • Light in Weight
  • Resin Complies with FDA 21 CFR 177.150 (c) 3.1 and 3.2


  • Light Weight Fabric
  • Easy Installation
  • Robust and Rugged Exterior
  • Rated for Underground Storage
  • Safe for Potable Water

Typical Applications:

  • Rainwater Collection
  • Water Storage
  • Vacation Home Water Storage
  • Below Ground Water Storage

Questions? Call us at: +1-772-646-0597
Or Submit a Price Quote Below!

Underground Water Storage Tank Technical Specifications

Part Number
Capacity (gal)
Size in Inches
325 54D x 51
600 101 x 51 x 58
1000 86 x 65 x 68
1200 102 x 60 x 58
1250 86 x 76 x 68
1700 143 x 55 x 66

Looking for an underground tank that can store more than 1600 gallons?
Not a problem! For sizing above 1600 gallons, please check out the following tank options:

Tanks. Typical fiberglass sizing includes capacities up to 20,000 gallons, while steel sizing can go as high as 50,000 gallons. For more information, check out our Underground Water Storage Tanks.


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