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This replacement set was good, but it took me two trips to finish the install. Two observations: 1) The included 4 inch lower pipe was too short, so a second trip to the store was required. Why they do not include the necessary 6" pipe is beyond me. Is cost-cutting that important here? I don't see anyone selling 4" pipe lengths, so I'm not sure why anyone thinks a 4 " pipe will be sufficient, unless you want to completely redesign the drain pipes. 2) It is not as heavy-duty as the installation it replaced, but I guess I should expect that, given that the original installation was at least 20 years old, and maybe as much as 45 years in age.