Is this a sewer vent pipe?

[MarianneW]

 

[MitchellMc]

Welcome to the Bunnings Workshop community @MarianneW. It's wonderful to have you join us, and many thanks for your question about vent pipes.

You would need to follow the pipe up to see where it terminates. If the pipe you have circled in yellow travels up and has a vent outlet at the top, then it's entirely likely that it is a sewer vent pipe.

Please let me know if you have any questions.

Mitchell
 

[MarianneW]

Hello, thanks for your reply. The pipe starts where it is rusty at the base at cement mound and travels up from downstairs apartment past upstairs apartment to the rooftop. The building is 100 years old and the pipe is not pvc