The present invention discloses a wall tap (1) comprising: an escutcheon (2); a piston (13) that can be fixed to a wall installation (18) for the water inlet (8); a spout (3), which can be fixed to the piston (13) at one end of the spout (3) where the water inlet (8) is housed; a solenoid valve (4); a proximity sensor (5); a battery (6); a microcontroller (7) connected to the proximity sensor (5); and, a cover (14). As a novelty, the proximity sensor (5) and the microcontroller (7) are located in the escutcheon (2), and the solenoid valve (4) and the battery (6) are in the spout (3). Moreover, the battery (6) is located at another end of the spout (3), which is closed by the cover (14).