the type described only as an example the internal surface of cup closure 14 supports a generally upwardly extending filter strainer 18 mounted on a strainer leg 16 strainer 18 extends along a generally vertical cup closure axis 14 a directly across the wastewater flow pathway 28 the filter strainer 18 and strainer leg 16 are attached to or integral with cup closure 14 this enables the strainer 18 to extend automatically into the wastewater pathway as the closure 14 is threaded or otherwise fastened onto a lowermost surface of drain trap assembly 10 thereby closing service opening 22 wastewater from the sink or tub flowing into inlet 2 travels downwardly guided by lower and side surfaces 6 and 7 of assembly 10 where the wastewater impinges against strainer 18 when cup closure 14 is detached as for example by unscrewing a threaded connection with bottom surface 6 the filter strainer 18 will be withdrawn generally downwardly along with cup closure 14 in this way sediment 26 including dirt particles strands or dots of hair and other material entrapped by filter strainer 18 may be removed and recaptured valuables and other items accidentally included in the wastewater may be recovered in.