Order Online CONDUIT RAT - SMALL/MEDIUM 1/2″ – 1-1/2″ PVC or EMT CONDUIT The Small CONDUIT RAT™ will go into a small ½” PVC or EMT pipe up to 1-1/2”. CONDUIT RAT - LARGE 2″- 8″ PVC or EMT Conduit The Large CONDUIT RAT™ will go into a large PVC or EMT conduit from 2” to 8”.