A diaphragm pump comprising: a motor; a diaphragm plate having a plurality of similarly defined circular regions; a valve housing having defined therein at least one outlet valve seat and at least one inlet valve seat, the at least one outlet valve seat being in fluid communication with the outlet chamber and the at least one inlet valve seat being in fluid communication with the inlet chamber; and a wobble plate having a central boss and a plurality of similar piston sections equal in number to the number of circular regions on the diaphragm plate, the piston sections and circular regions on the diaphragm plate being correspondingly secured together, whereby in use, when the motor is activated, the wobble plate is subject to nutating motion to cause reciprocating action of the circular regions and thereby provide a pumping action; characterised by a housing for receiving and securely holding the motor, the housing comprising an elongate portion having a closed end and an open end, the elongate portion being adapted to securely receive and house the motor; and a collar portion being provided at the open end of the elongate portion for receiving the wobble plate; a cover for the housing, the cover being adapted to securely receive therein the valve housing and to engage with the housing, the cover having substantially axially aligned inlet and outlet ports (18, 20), each leading to mutually exclusive inlet and outlet chambers (22, 24) respectively; and a motor locking plate adapted to be secured to the motor such that when the motor locking plate is secured to the motor and with the motor inserted in the elongate portion of the housing, at least a portion of the motor locking plate is provided within the collar portion; wherein the diaphragm plate extends across the open end of the housing, between the collar portion of the housing and the cover, and is secured therebetween when the cover is engaged with the collar portion of the housing. a motor; a diaphragm plate having a plurality of similarly defined circular regions; a valve housing having defined therein at least one outlet valve seat and at least one inlet valve seat, the at least one outlet valve seat being in fluid communication with the outlet chamber and the at least one inlet valve seat being in fluid communication with the inlet chamber; and a wobble plate having a central boss and a plurality of similar piston sections equal in number to the number of circular regions on the diaphragm plate, the piston sections and circular regions on the diaphragm plate being correspondingly secured together, whereby in use, when the motor is activated, the wobble plate is subject to nutating motion to cause reciprocating action of the circular regions and thereby provide a pumping action; characterised by a housing for receiving and securely holding the motor, the housing comprising an elongate portion having a closed end and an open end, the elongate portion being adapted to securely receive and house the motor; and a collar portion being provided at the open end of the elongate portion for receiving the wobble plate; a cover for the housing, the cover being adapted to securely receive therein the valve housing and to engage with the housing, the cover having substantially axially aligned inlet and outlet ports (18, 20), each leading to mutually exclusive inlet and outlet chambers (22, 24) respectively; and a motor locking plate adapted to be secured to the motor such that when the motor locking plate is secured to the motor and with the motor inserted in the elongate portion of the housing, at least a portion of the motor locking plate is provided within the collar portion; wherein the diaphragm plate extends across the open end of the housing, between the collar portion of the housing and the cover, and is secured therebetween when the cover is engaged with the collar portion of the housing.