OK... I live in a big old Victorian house built in the late 1800's. The sewer pipes are OLD and once again I had to rent a snake and clean out the main line to the street.
There is a floor drain in the basement which backs up and that's where I put the snake in. Anyway, I get to about 30 feet and the snake stops dead. However, once I hit that and drill at it for a minute or two, suddenly the flood waters disappear with a giant sucking sound. There's obviously something there, but I don't know what. So far I've not been able to get whatever it is out. Fortunately, even though I had to perform this ritual about 6 times last year, this is the first time since last spring that I've had to do it so I must have done a pretty good job of clearing it last year.
Any ideas on what the hell might be blocking it and how to be done with it once and for all, short of replacing all the pipe out to the street (about a $8,000 project from what I was told).