The 878-40 from Sioux Chief is a 4” FIP Cleanout Flush Plug. It's designed to close the FIP outlet of a 4" cleanout fitting when it is not in use. Comes with molded-in brass insert which allows to connect a threaded rod and install a cleanout drywall cover (cap) when the finished walls are in place.
|Connection:||MPT (MIP) Threaded|
|Size:||for 4" PVC/ABS/Cast Iron FIP cleanouts|