Tapper

 is a water salesman for The Kings Gang living in the Mojave Wasteland in 2281.

Other interactions
He sells one drink of water for 10 caps. You pay per use, so when drinking, do not stop until your health is full. If you had done the quest High Times, and helped Bill Ronte, the Followers will work out a deal so, you'll get a free drink.

Appearances
appears in Fallout: New Vegas.