Underground and Aboveground Grease Interceptor tanks are commonly used in commercial and institutional kitchen design applications. The fats, oils and grease (FOG) that is found in these tanks creates a very corrosion environment which is ideally suited to fiberglass tanks. Regulations are increasingly focusing on the Interceptors being water tight and structurally competent. Our Interceptors are available in a wide range of sizes including IAPMO-listed models.