Hello, I have a kitchen mixer tap with filtered water that needs replacing. It is mounted through granite worktop. The hole in the granite I'm guessing is 22mm. Certainly not wide enough for the ~32mm pipe that comes with the new tap. The tap that is currently on there appears to have horseshoe fitting to secure it with 'threaded pipe' going through the hole in the horseshoe. (Not a bolt as I've seen before). The threaded pipe I guess screwed into the filtered water inlet? Before I take the tap off I cant think of another way of doing this. The new tap has only 32mm pipe for all three water pipes to pass through to the tap. Thats not going to work. so should I just use the smaller threaded pipe from the old tap going to the filtered water to secure this? Sorry if this sounds confusing! Cant/ dont want to enlarge the hole in the granite! any advice appreciated.