Garbage disposal started making a helluva racket a few days ago 11 yrs old and one of the blades had broken..Thought about a plumber to replace and then decided what the hell..I'll give it a try. Took me about 3 hrs but finally finished.Nothing is easy it seems.. Plastic Drain pipe supplied was curved and it said must use this one or won't discharge properly if you use the old one. I would have had to replace all the other plumbing to get this curved one to work.. So..said screw it and used the old one..Appears to be working fine but will check for leaks often for awhile. Oh yeah, had to hacksaw off about an inch of the old pipe as it wouldn't go back in place..Not sure how it ever fit.