Rusco 1-100ST-F Polyester Screen Sediment Trapper System The Rusco clear cover is made of high impact polymer resin for maximum strength and durability. The top of the Rusco system is made of PVC. The Rusco sediment trapper filters usecentrifugal separation technologyto filter sediment from water. The Rusco sediment trapper filters usecentrifugal separation technologyto filter sediment from water. The Rusco filtration system has a polyester screen filter.