About a year ago, I bought a small counter top dishwasher; the apartment I lived in a the time had a kitchen with a connector for it on back of the tap. I have since moved, and the new apartment's kitchen does not come with the necessary facilities.
My first thought was to buy a tap with the required connector, but since this kitchen is quite old, no modern taps (one large cylinder) fit into the counter (two small holes).
So instead I've prepared a connector for the dishwasher under the sink, and all I need now to get it installed is to make an hole in the counter top to route the plastic water pipe through.
How would I best go about this to make the hole look clean and have a raised edge to prevent leakage?