old guy wrote:
you can heat the blade of a screw driver and shove it into the broken piece and screw it right out.
Not really sure that a screwdriver will get enough ump to remove a stuck plug and if it is a OEM style plug it is hollow inside. It would take a huge screw driver in order to grab the sides..
The right tool is a pipe nipple extractor which is designed for extracting broken pipes..
HERENotice that it is NOT the same thing as a a "easy out" which are designed for extracting bolts which tend to break off leaving you with a bigger mess..