Clean-out plugs usually can be sealed with plumber’s tape, or pipe thread tape, (commonly known as “Teflon tape,” although there’s no such product of that name) or with pipe dope, or pipe joint compound.Click to see full answer. Keeping this in consideration, how do you seal a PVC cleanout plug?PVC and ABS plugs have the same kind of pipe threads as metal plugs, so they can be installed directly into the metal cleanout fitting without an adapter. Place a thick layer of plumber’s thread sealant on the threads of the cleanout plug. Put the plug into the cleanout fitting by turning it clockwise.One may also ask, what is a cleanout plug? Beneath their drain covers is a plastic or metal cap, also known as a cleanout plug, as well as a standard drainage pipe. That cap stops waste water from flowing into the cleanout, forcing it to pass directly into the sewage pipe. Also question is, how do you fix a cleanout plug? How to Replace a Main Drain Clean-out Plug Step 1 – Remove the Old Clean-Out Plug. You’ll need to remove the old clean-out plug. Step 2 – Clean Clean-Out Threaded Opening. Step 3 – Apply Pipe Compound to New Plug. Step 4 – Insert and Tighten New Plug. What is a PVC cleanout plug? Product Overview Temporarily cap your drain, waste and vent system with the NIBCO 2 in. PVC DWV MIPT Cleanout Plug. The plug is used with a PVC cleanout fitting (sold separately). PVC DWV is easy to install and is joined by solvent cementing or threading.