I used this Cobra to route a kitchen sink drain under a garbage chute. To do this, I unhooked the siphon P under the drain and crawled straight into the galvanized pipe under my sink. Since I had to reconnect the drain to keep the water running and make sure the clog was cleared, I had to insert and remove the entire 25-foot length of snake twice before clearing the clog, but after the second flush my sink just drains fine. At first I lowered it into the canal by hand, but after about 15 minutes of fiddling I attached it to a cordless drill and the job went much quicker. The length of pipe I coiled had four 90 degree turns, one of which was a T-connection to the vent pipe. I was lucky that both times I got to the T-junction, the line went DOWN, not up, into the attic. I'm not sure if it was skill or luck. The only real downside is that, as others have said, the snake itself is not connected to the drum at the very end. So if you continue to slither beyond 25 feet, the snake will break out of the drum. Don't worry if this happens, simply loosen the 4 Phillips head screws holding the drum together, insert the serpentine end into the hollow handle and reattach. You can do all this while the snake is still in stock. To fix the problem permanently, wrap a zip tie around the small, thick part of the snake that is designed to keep the end from coming out when the snake is fully extended. It's just not big enough, but the zip tie keeps it from coming out again. Replace the 4 screws and then manually thread the snake back into the drum. All in all I would definitely recommend trying this on a drain before calling a plumber. Spending $25 on it saved me at least $100.