Removing a Siezed Cleanout Plug

[OneGuyInCA]

The square knob on my cleanout plug broke off. It broke off when I tried to unscrew it with a pipe wrench. The cleanout plug is made of some sort of fairly soft metal (possibly brass). What is the best way to remove the plug? Someone suggested making two cuts (quarter circle apart) all the way to the edge with a metal sawser.. and using a hammer to hammer it in, thereby collaspsing the plug??

 

[Cwhyu2]

The square knob on my cleanout plug broke off. It broke off when I tried to unscrew it with a pipe wrench. The cleanout plug is made of some sort of fairly soft metal (possibly brass). What is the best way to remove the plug? Someone suggested making two cuts (quarter circle apart) all the way to the edge with a metal sawser.. and using a hammer to hammer it in, thereby collaspsing the plug??

That is the only way to get it out, have done it many times then install new plug when finished with your work.

 

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[Reach4]

Here is another thread too.
https://terrylove.com/forums/index.php?threads/main-drain-caps-brass-vs-lead.24963/

 

[Jadnashua]

You could drill a hole in it near an edge, then use a chisel and hammer to try to unscrew it, but cutting it should work, too.