For the Moen, I kept all the paperwork, unscrew the handle, pull the "E" clip and then the cartridge should pull out, I'll have to emphasize SHOULD, if I pulled any harder, the whole chitten faucet would have come up through the counter top. Took the whole unit out, and finally in a 6 inch bench vise and wrecking bar it came out, bad molding or whatever, but never another Moen.