Georgia Septic Installer Practice Test

For fiberglass tanks not exceeding 1500 gallons, what is the minimum wall thickness required?

1. 3 inches

2. 4 inches

3. 5 inches

4. 6 inches

The correct answer is: 4 inches

The minimum wall thickness required for fiberglass tanks not exceeding 1500 gallons is established to ensure structural integrity and durability, keeping in mind the environmental and operational stresses these tanks may encounter. A thickness of 4 inches strikes a balance between providing sufficient strength and maintaining manageable weight. This standard is particularly important because fiberglass tanks are often used for septic purposes and must withstand soil pressure, potential impacts, and internal pressures from the liquid contents. A thickness greater than 4 inches may be unnecessary for tanks of this size, potentially leading to increased material costs and weight without corresponding structural benefits. Adhering to this standard also promotes safety, ensuring that the tanks can function effectively over their intended lifespan without risk of failure.