15 gpm/30# Poly Grease Interceptor. Ashland traps are the ones that don't rust. Ashland Grease Traps are seamless, easy to install and easy to ship. The Poly 4800 series trap product line is PDI approved and available from IAPMO and UPC. Ashland Grease Traps are available in a variety of sizes and varieties for virtually any application that requires it.