What materials are commonly used for septic tank construction?

The most commonly used materials for septic tank construction are concrete, fiberglass, and plastic due to their durability, ease of installation, and effectiveness in handling wastewater.

Concrete is favored for its strength and longevity, able to withstand soil pressures and the corrosive environment of septic systems. It's highly resilient, making it a popular choice for permanent installations. Fiberglass is lightweight and resistant to corrosion, allowing for quick installation and reducing the risk of leaks. It also does not rust, rot, or corrode like some other materials may. Plastic, similar to fiberglass, is lightweight and resistant to corrosion, which makes it easier to transport and install compared to heavier materials. Its use in septic tank construction has increased due to its cost-effectiveness and versatility.

The other materials listed in the different options, such as wood, steel, brick, glass, or aluminum, are not commonly used in the construction of septic tanks due to their susceptibility to decay or corrosion and their inability to effectively contain and treat wastewater over the long term.