Yep thats right.... Ran a vent today cause I have had bad experinces with pulling toliets. I some how managed to drop a 7ft section on my K-50 cable down the stack. I said OH S So I went ahead a ran the vent, hoping I would push the cable on down the line. Which it did. But I still had to pull the toliet and run the camera to retrieve my cable. It pushed down about 2 ft from the toliet stub up. Lucky for me I had the big cutter head on it and was able to pull the cable back to me. I love cameras!