10 GPM/20# 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 Trap Series 4800 product line is approved by PDI and listed by IAPMO and UPC. Ashland grease traps are available in a multitude of sizes and varieties vor virtually any application you require.