How do I replace this accordion pipe? Should I call a plumber (no plumbing experience)?

Please help me identify this plug waste thread. It's 16 years old & made in China. It's about 36.5 mm OD and about 17 threads per inch.

Touch or not to touch

Should I hit this with rust converter then paint over to prolong the life. Or, just let it be because it's normal. There is no leak. Pipe is located outdoor. Not in direct rain and sun but it does get sprinkled when it rains hard.

Threading worn out toilet

Tried to install a bidet and it didn’t work out now I can’t re tighten the supply line Can I cut the area where the thread worn out or what else can I do?

Black liquid keeps coming up the sink.

Walked into the bathroom to find this situation. In both sinks in the same bathroom. Looks like I caught it right before overflowing, it seems to have stopped right at the top. We’ve been emptying the water just in case. And contacting our management in our building so they know when the issue happened, and also contacting an emergency resource. Does anyone know what is going on? Or any ways to resolve in the meantime? Thanks

When you realize you could have just scooped out some lava from Mt Doom when you were there as a contingency for when the ring was available..............

Once I catch you, you little piece of s***…

I’m not very affluent with dating apps

Grond

This is getting out of hand!

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