The ritual handwashing sink, also known as the netilat yadayim sink would be a sink designated for the guests to wash their hands before the meal. We named this dedication after the hand washing vessel of the Temple, known as the Kiyor. There are many references to this in the end of Shemos in the way it's referred to as the vessel and its stand, “Hakiyor Ve’es Kano”. In addition to being inscribed on the dedication wall, this dedication can also be displayed above the sink.