U-bend pipe’s under your kitchen sink helps transfer waste water to your home’s sewer line and contains water in its neck that keeps sewer odors from escaping into your home. The pipe, also known as a trap, contains two nuts securing the pipe in place and is removable for cleaning and removing any debris. Like other plumbing repairs, gather all of the tools you need for removing the U-bend pipe before starting the repair process.
Place a large, old towel under the U-bend pipe you want to remove, then sit a bucket directly underneath the pipe. The bucket will catch any water present in the pipe and the towel will keep the area under your sink dry.
Flush the pipe with water from a water hose. You will see soap scum, gray matter and other debris exiting from the pipe --- this is normal debris present in the pipe.
Cut a strip of waterproof plumber's tape and wrap it around each of the pipe's nuts to seal the edges of the pipe.