This water system is not connected to the house water supply. It consists of a barrel; an electric, foot operated, pump that takes water from the barrel through a filtered intake and sprays it out a hand controlled garden-style faucet. When attached to a vertical surface as shown it remains self-primed unless fully drained by removing the intake hose. The foot operated switch pumps air to the electric plug controller to turn on the electric current. A second step on the foot valve turns of the electric switch. No need to stand with your foot on the valve and no danger of electric shock as all electric current is attached to the vertical surface above and away from the water. A GFI plug offers redundant safety.