PVC Sink Waste Set and Round Overflow set Require a sink with an 85mm drain hole 1 1/2" For traditional kitchen sinks Centre pin fixing No sealants required Easi Plumb 1 1/2" Pvc Sink Wast Kit With Round Overflow | Epfsw2pc The Easi Plumb PVC Sink Waste Set with Round Overflow - 1.5in is a PVC waste outlet for traditional kitchen sinks with round overflow holes. The centre pin fixing connection has the advantage of a quick, simple and neat installation. No sealants are required when fitting this waste set.