Cast iron sewer pipe fittings
That lead and oakum is nearly impossible to get out sometimes,,,and when(if) you get that section out,,even chain snapping it out, you run the risk of the whole damn thing coming down into the basement like a periscope going down. Being a sewer line, Its not under pressure,,and even so, drains are only tested to 25psi,,,so based on the pain in the *** factor, and the diy factor,,,i would jb weld it then purchase some of that rubber stretch repair tape. Its not adhesive,,but super stretchy,,,and you pull tension on it as you wrap it around the repair,,blue monster makes it,,im sure others do too,,,but it works amazingly good.