Apparatus, including a pump system, comprising: a first pump configured with a first pump actuating portion; a second pump configured with a second pump actuating portion; an assembly frame configured to receive the first pump and the second pump, having a first pedal coupled to the first pump actuating portion, a second pedal coupled to the second pump actuating portion, and also having a rocker arrangement with at least one rocker (20a, 20b) configured to pivotally couple the first pedal to the second pedal, so that a pushing movement of the first pedal in one direction causes a pulling movement of the second pedal in an opposite direction, and so that a corresponding pushing movement of the second pedal in the one direction causes a corresponding pulling movement of the first pedal in the opposite direction; the first pedal configured to respond to a pushing force, move the first pump actuating portion for pumping a fluid from the first pump, and also correspondingly move the second pump actuating portion for drawing the fluid to be pumped into the second pump; and the second pedal configured to respond to a corresponding pushing force, move the second pump actuating portion for pumping the fluid from the second pump, and also correspondingly move the first pump actuating portion for drawing the fluid to be pumped into the first pump; wherein the assembly frame comprises a first elongated assembly frame member having one end portion configured with a first extended pedal, and having another end configured to couple pivotally to one part of the assembly frame and a second elongated assembly frame member having one corresponding end portion configured with a second extended pedal, and having another corresponding end configured to couple pivotally to another part of the assembly frame characterized in that the first elongated assembly frame member has an intermediate portion configured with a first wheel rotationally coupled thereto for rolling on the first pedal; and the second elongated assembly frame member has a corresponding intermediate portion configured with a second wheel rotationally coupled thereto for rolling on the second pedal. a first pump configured with a first pump actuating portion; a second pump configured with a second pump actuating portion; an assembly frame configured to receive the first pump and the second pump, having a first pedal coupled to the first pump actuating portion, a second pedal coupled to the second pump actuating portion, and also having a rocker arrangement with at least one rocker (20a, 20b) configured to pivotally couple the first pedal to the second pedal, so that a pushing movement of the first pedal in one direction causes a pulling movement of the second pedal in an opposite direction, and so that a corresponding pushing movement of the second pedal in the one direction causes a corresponding pulling movement of the first pedal in the opposite direction; the first pedal configured to respond to a pushing force, move the first pump actuating portion for pumping a fluid from the first pump, and also correspondingly move the second pump actuating portion for drawing the fluid to be pumped into the second pump; and the second pedal configured to respond to a corresponding pushing force, move the second pump actuating portion for pumping the fluid from the second pump, and also correspondingly move the first pump actuating portion for drawing the fluid to be pumped into the first pump; wherein the assembly frame comprises a first elongated assembly frame member having one end portion configured with a first extended pedal, and having another end configured to couple pivotally to one part of the assembly frame and a second elongated assembly frame member having one corresponding end portion configured with a second extended pedal, and having another corresponding end configured to couple pivotally to another part of the assembly frame characterized in that the first elongated assembly frame member has an intermediate portion configured with a first wheel rotationally coupled thereto for rolling on the first pedal; and the second elongated assembly frame member has a corresponding intermediate portion configured with a second wheel rotationally coupled thereto for rolling on the second pedal.