-
What's wrong, is the pipe leaking, or is it rusting, and the pipe needs to be replaced?
A pipe that drains the water from the roof of a building on a rainy day.
You are a squatting toilet, chopsticks can't be flushed, generally blocked in the elbow on your picture, you can loosen the lid below to take out the chopsticks, and then cover it.
The squatting toilet itself has a trap, and it is redundant to use this again. (Except for the straight-down squatting toilet, which is required for the straight-down type).
There's nothing wrong with that, this sign is just to keep people from going to the wrong toilet.
There is no water meter for a toilet, the water consumption is small, and it is not necessary, the property has a general meter, and someone will place an order on a regular basis, and the water and electricity bill.