A fluid pump comprising: a housing defining a longitudinal axis ( X-X'); and a base adapted to be movably coupled to the housing, wherein the base is adapted to move relative to the housing along the longitudinal axis ( X - X') between at least a first position and a second position, the housing further includes a locking element movably coupled to the housing, wherein the locking element defines a first structural feature; and the base defines a second structural feature, wherein the first structural feature and the second structural feature together define a first relative configuration and a second relative configuration such that: the housing and the base are fixed relative to each other in the first relative configuration, and the housing and the base are adapted to move relative to each other in the second relative configuration; the base further includes: at least one primary inlet and at least one secondary inlet; characterized in that: the at least one secondary inlet provides an adjustable inlet area; the at least one primary inlet is adapted to receive a flow of fluid in each of the first position and the second position; and the at least one secondary inlet is adapted to receive the flow of fluid in the first position. a housing defining a longitudinal axis ( X-X'); and a base adapted to be movably coupled to the housing, wherein the base is adapted to move relative to the housing along the longitudinal axis ( X - X') between at least a first position and a second position, the housing further includes a locking element movably coupled to the housing, wherein the locking element defines a first structural feature; and the base defines a second structural feature, wherein the first structural feature and the second structural feature together define a first relative configuration and a second relative configuration such that: the housing and the base are fixed relative to each other in the first relative configuration, and the housing and the base are adapted to move relative to each other in the second relative configuration; the housing and the base are fixed relative to each other in the first relative configuration, and the housing and the base are adapted to move relative to each other in the second relative configuration; the base further includes: at least one primary inlet and at least one secondary inlet; characterized in that: the at least one secondary inlet provides an adjustable inlet area; the at least one primary inlet is adapted to receive a flow of fluid in each of the first position and the second position; and the at least one secondary inlet is adapted to receive the flow of fluid in the first position. at least one primary inlet and at least one secondary inlet; characterized in that: the at least one secondary inlet provides an adjustable inlet area; the at least one primary inlet is adapted to receive a flow of fluid in each of the first position and the second position; and the at least one secondary inlet is adapted to receive the flow of fluid in the first position. the at least one secondary inlet provides an adjustable inlet area; the at least one primary inlet is adapted to receive a flow of fluid in each of the first position and the second position; and the at least one secondary inlet is adapted to receive the flow of fluid in the first position.