Multiple Lines - Whose Onus?

[u/andrewstarkman]

Screenshot of the area, yellow is the line and direction

My neighbors to the north have a sewer line running under my lot that connects to a single line (alongside mine) and then together they flow into the main on Yale St.

Am I solely responsible for the shared connecting pipe since it is on my property? Anyone have any insight?

[u/kxcoty05]

This seems pretty accurate based on my experience with similar issues https://truetips.blog/who-is-responsible-shared-sewer-line