I have an addition on a 100+ year old house that was built around 60 years ago for a kitchen and full bath. We've been in the house 15 years. The kitchen sink is backing up and draining out very slowly. This has happened once many years ago and the plumber had to cut the stack pipe just above the clean out (it was corroded shut).
So, last night I went in the basement and removed the sleeve (the cut was about a foot above the basement floor) and poured in some water to confirm that the clog was somewhere between the clear out and the main line. Everything else in the house is draining fine, including the bathroom fixtures on the other side of the addition. The pipe filled up quickly, so I ran a hand auger down the pipe a distance of about 15 ft. I removed the auger and found very little residue on the auger tip. I poured water again and the water quickly backed up again to the top of the pipe. Then, Gross Alert!!!, I noticed something floating on top. I examined it and it appeared to be a piece some dog fecal matter. I told my wife about it and she confirmed that she had flushed a dog accident a few hours earlier in the toilet on the other side of the room.
So, how did that happen?! I understand the two pipes join together at some point. But how could a still intact portion of a dog pile make its way up the kitchen sink pipe when the pipe will barely allow water to drain down. If the clog was farther down the line from where the toilet and sink come together that would make sense. But the toilet, bathtub, and bath sink all drain perfectly. Thanks in advance for any helpful thoughts or ideas. I’m puzzled.