6-30-2023: tv’d kitchen line from under sink, saw a screw possibly drilled through pvc pipe or stuck in pipe, elbow at bottom of drop was holding water could not get camera through bottom elbow. Ran kitchen water no water made it to outside clean out or tee connection from kitchen(had camera in 4” main from outside clean out). Preformed a smoke test from under kitchen sink we had heavy smoke out roof vent stack, smoke where pvc pipe goes into concrete floor under cabinet, also smoke in laundry room area. No smoke made it to outside clean out, tee connection into main line, or main waste stack.