I'm withdrawing my question. Was hoping to get this cleared up by 10PM.
Hi Rick. I have a Kohler kitchen faucet -- single handle with a pull-out sprayer. It was in the apartment we bought a couple of years ago, and was probably a couple of years old then, at least. The only identifying info I have in on the back: Kohler 2.2 GPM, 8.3 L/min., A112.18.M. Anyway, it leaks a bit -- say a couple of tablespoons a minute. I'm wondering if there's a way I can fix it on my own. I don't have any experience, but I took it apart and it seems like it would be pretty straightforward to replace the plastic parts with the washers. Might that do the trick? Or would you recommend having a professional look at it. Thanks a lot!