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Underground Fiberglass Storage Tanks

Long Lasting Underground Liquid Storage

fiberglass underground storage tankUnderground Fiberglass Storage Tanks are a high-strength and long-lasting storage option used to contain drinking water, non-drinking water, wastewater, and chemicals. Fiberglass tanks are built with a robust outer exterior that holds up to below ground storage, while their interior fiberglass resins are built to match the liquid being stored in the tank. This creates a system of storage that can hold liquids for extended periods of time without damage to the tank.

Standard fiberglass storage tank construction allows the tanks to be buried up to three feet (3') below the ground. If a deeper burial is required, or if the tanks need to withstand vehicles driving over them, please let us know so that we can provide you with the most accurate quote for your location.

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Underground Fiberglass Tank Features & Specifications

Underground Fiberglass Storage Tank Features

  • Fiberglass Tank Construction
  • Sizing up to 20,000 gallons
  • Standard 0-2" Fitting Options
  • Standard Tank can be buried up to 36 inches (3') underground (Please specify if you would like a tank that can be buried more than 36 inches.)
  • Traffic-Rated Tanks Available

Underground Fiberglass Storage Tank Benefits

  • Lighter Weight for Easy Installation
  • Resistance to Leaking and Cracking
  • Equipped for Underground Elements
  • Corrosion and Rust Resistant
  • Resin Built to the Type of Liquid Store in the Tank
  • Minimal Site Prep Required

Fiberglass tanks can be manufactured to almost any specification, so please call to discuss your requirements. Each fiberglass underground storage tank includes an Inlet, Outlet, Overflow/Drain, Vent and a 20" Manway.

Standard construction of this tank allows you to bury it up to 36 inches (or three feet). If you will need to be burying this tank deeper than three feet or if you need a tank that is traffic-rated, please specify your requirements so your tank can be adjusted to meet your needs safely.

Standard Fittings are Galvanized (up to 2") or PVC (up to 4")
Flanged Fittings, ABS, or Other Fittings are Considered Specialty and are Extra
Description Dimensions Weight
PIP Adapter 20" D x 4" -
20” EXTENSION PER FOOT 20" D x 12" 20
24” EXTENSION PER FOOT 24" D x 12" 27
30” EXTENSION PER FOOT 30" D x 12" 35
Lift Eye - -
NYLON Tie-Down Strap 4” Wide 5
Jaw-&-Jaw Turnbuckle, 2 - 10
6-Hole Junction Bw/ rings 9"x14"x9" 6

Fiberglass Tank Uses and Options

Fiberglass Underground Storage Tanks are used in a range of locations to store liquids safely. Some of the most common uses for these tanks include the following:

  • Rainwater Collection and Storage
  • Potable Water Storage
  • Backup Supply for Wells
  • Irrigation Storage Tanks

Due to the strength of its exterior, fiberglass tanks are a great solution for below ground liquid storage. Able to withstand the pressure of below ground installation, these tanks store liquids without folding or collapsing under pressure. Fiberglass tanks are also high in chemical resistance, making them ideal for protection against below ground elements and interior chemical storage.

Additional Water Storage Tank Options

In addition to fiberglass water storage tanks featured here, we also offer several additional water storage tank options equipped to handle both potable and non-potable water. Please feel free to check out any of the pages below for
more information regarding individual storage options:


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