Underground Tanks: Water and Septic Tanks

The fiberglass of our tanks is: 

  • 100% Waterproof —You avoid corrosion, residue and maintenance… No more leaks!
  • Sustainable — This is the perfect option for peace of mind.
  • Economical — It’s important to save on transport and installation costs thanks to its lightness, but also on maintenance and repair costs: fiberglass lasts over 30 years!

Imagine being able to benefit from affordable personalized services and the best delivery times on the market! Discover the many possible applications here. 

Blasting, excavation and installation are handled by our customers or by one of their suppliers. The Granby Composites team can assist and advise you every step of the way. We have an installation manual for all our customers’ tanks. To consult the manual: click here.

About Fiberglass Septic Tanks

Granby Composites offers industries and institutions septic tank options that facilitate wastewater recovery and treatment. Indeed, the configuration of each tank is adapted to meet your needs. For example, the number and configuration of inputs and brackets for equipment are developed according to your specifications. 

Choosing an underground tank maximizes every square foot of surface. 

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6′ Tanks

6′ TANKS ( FROM 2 000 US GALLON TO 12 500 US GALLON )

8′ Tanks

8′ TANKS ( FROM 4 500 US GALLON TO 24 000 US GALLON )

10′ Tanks

10′ TANKS ( FROM 10 000 US GALLON TO 41 000 US GALLON )

6′ Septic Tanks

6′ SEPTIC TANKS (FROM 8.5 M³ TO 42 M³)

8′ Septic Tanks

8′ SEPTIC TANKS ( FROM 16.5 M³ TO 82.5 M³)

10′ Septic Tanks

10′ SEPTIC TANKS (FROM 34.5 M³ TO 140 M³)

Types of uses