Thought the adapter would work on my tap as it is fairly new(pull-out type with sprayer) but of course it didn't. Bought this while back and have yet to get the proper adapter. Was going to send it back but it's more of a hassle than what it is worth. Culligan should really get a modern adapter as most people don't have old taps!!!! Guess I will never know how it works until maybe oneday I do find the right one!!!