Fiberglass Underground Water Storage Tanks

Flowtite® water tanks are available for a variety of water and wastewater storage applications.


We applied the same manufacturing process and experience to create Flowtite®, our own line of water storage tanks. These tanks are made to the same standard as our petroleum tanks and meet AWWA D120, NFPA 22, NSF 61 and IAPMO standards for water/wastewater storage tanks.

Typical Applications

  • Rainwater Harvesting
  • Stormwater Collection
  • Onsite Septic Systems
  • Fire Protection
  • Potable Water Storage
  • Grease Interceptors
  • Chilled Water
  • Graywater Reuse

Additional filtering components to separate oil and other contaminants are available to turn your tank into a separator or interceptor, which takes in dirty water and discharges clean water to be stored for recycling or fed into the local water infrastructure.

  • Containment Solutions Capabilities Brochure

  • Containment Solutions Capabilities Brochure (Spanish)

  • Containment Solutions Tank Sumps Brochure

  • Containment Solutions Tank Sumps Brochure (Spanish)

Related Products

Fiberglass Underground Rainwater Harvesting Storage Tank

Rainwater harvesting (RWH) captures, diverts and stores rainwater for later use.

Learn more

Fiberglass Underground Stormwater Collection Tank

The best solution to collect and store flood water.

Learn more

Fiberglass Underground Onsite Septic Storage Tank

Tanks for use in both aerobic and anaerobic septic applications.

Learn more

Fiberglass Underground Potable Water Storage Tank

Flowtite fiberglass tanks adhere to NSF 61 and AWWA standards for potable water storage.

Learn more

Grease Interceptor

A Flowtite Fiberglass tank for wastewater in grease producing areas.

Learn more

Fiberglass Underground Water Storage Accessories

Regardless of your project needs, we have a variety of water tank accessories to create the best tank for your specific application

Learn more

Explore More

Underground installation of pipeline tanks, separated into 4 parts, with employees around and on the tanks

Fiber Glass Systems

With manufacturing facilities located around the world, we provide composite piping systems, fittings, and structures to the oil and gas, chemical, marine, offshore, fuel handling, and mining industries.

Learn more
Machinery picks up a line of composite pipe

Composite Solutions

Our composite solutions are designed to address weight- and corrosion-related challenges.
Learn more