Fiberglass septic tanks are specialized equipment made from a synthetic resin matrix and reinforced with glass fiber materials, designed for the treatment of domestic wastewater. These tanks are actively promoted by the state as composite material products, offering advantages such as lightweight, high strength, excellent flexibility, corrosion resistance, vibrant colors, and a glossy finish resembling a mirror.

Far surpassing similar products made of ceramics, rigid plastics, and steel, they are widely used in industries such as chemicals, petroleum, construction, textiles, aviation, navigation, transportation, electricity, metallurgy, machinery, food, papermaking, and environmental protection.