Update:

Yesterday (Friday the 13th) we had the sewer scoped and located by a rooter company (under $200.00). Three homes sit side by side. I'm in the middle with one to the north of me and one to the south of me. It appears the Home to the North of us runs through our property and ties into my line. Then it continues on and it ties into the sewer that the neighbor to the south of me and finally hooks up to the sewer main. The three houses share one common sewer line.

If you read my 1st post - no easement has been recorded - Is this a case of a "Prescriptive easement"? If I wanted to replace my 80 year old cement sewer pipe with PVC could I replace it all the way to the sewer main without permission or do I stop at the property line? What if I wanted to run a separate sewer line from my house to the sewer main?

I'm wondering what rights each neighbor has over the neighbor the the south- I'm the one that's literally stuck in the middle.

Thanks for the help