In the Talmud we learn that during the times of the Temple there was a law which required hands to be washed before eating any food which was dipped into a liquid. Because this hand-washing precedes Karpas, when we dip a green vegetable into saltwater, the Urchatz remains as a reminder of these times.

DIRECTIONS: Ask a child to carry a pitcher of water, basin and towel and pour wather over each guest's hands. The washing is done in silence and without a prayer.

haggadah Section: Urchatz
Source: unkown