A method and apparatus are provided for coupling a pump head (1) and a motor housing (4) of a pump together so that a rotational positioning ring (2) of the pump head (1) frictionally engages a snap ring (5) of the motor housing (4) so as to allow for 360° rotation of the pump head (1) in relation to the motor housing (4), where the orientation of the pump head (1) and the motor housing (4) are adjustable in relation to one another so as to allow an end user to set the orientation of the pump in any configuration. The positioning ring (2) has a plurality of members separated by slots for radially flexing when the rotational positioning ring (2) is axially coupled over the snap ring (5) of the motor housing (4). Each of the plurality of members has a rim so as to form a raised edge for frictionally engaging a corresponding raised edge of the snap ring (5) of the motor housing (4).