How do you replace a male plug/cover on an existing female cleanout that is not a perfect round anymore?

Hi WV

It would help me to answer your question if I knew the material the pipe and cleanout are made of, OK?

Are we talking cast iron, galvanized metal, or PVC/ABS plastic pipe here?

I can tell you that if you have metal pipes and are trying to install a cleanout then one option besides cutting-out/removing the old cleanout and installing a new one is to TRY to find a properly sized universal LEAD CLEANOUT PLUG (see image). Here, the lead cleanout plug (only available online or at a local plumbing wholesaler) is slightly malleable and you can CUT threads into them as you turn the plug into the cleanout... works pretty good.

Another option might be to purchase a wing-nut type rubber plug... see image.

Back to you...

Mark

Hello Mark,
Thanks for the prompt answer.
The clean out is PVC. It is 6" in diameter (female) and it is located in a concrete driveway (about an inch above the driveway). I bought a male plug but could not screw it because the existing female clean out is not perfectly round.
Thanks again,
WV