If it hasn’t been a prob, why are you asking now? that being said, wait 7 more years the show that pic to the plumbing guy at Home Depot, he will be able to help you.I don’t hire anyone. I bought my house 12 years ago. Never had any issues.
There are plenty of posts on here from other people asking questions or wanting an opinion of something that aren’t plumbers. Glad you aren’t my plumber. I actually had a few private messages from people on here that were helpful, unlike you.