PVC Schedule 40 DWV. Used at the base of a vertical drain pipe to provide a cleanout opening flush with a finished wall. hub x hub tee with threaded side opening and plug. No. 71315: 1-1/2'' Schedule 40 PVC No. 71320: 2'' Schedule 40 PVC No. 71330: 3'' Schedule 40 PVC No. 71340: 4'' Schedule 40 PVC