[Korean plumber] What if this came out when changing the faucet?

Hello?
This is the plumber's Vlog channel, 'Korean Plumber'.
Running out with eccentricity when changing the faucet!
It's a service socket
If you're a beginner, you might be a little unfamiliar.
Along with the video of replacing the sunflower faucet with a normal shower faucet,
Learn about service sockets.^^
Please enjoy watching it. If you have any questions or want to see the equipment,
Please leave comments!
Please subscribe and like!
Thank you!

[@youcg0121]

일단 사이좋게 감사합니다

[@sul_vlog]

😊