build up of solid material or air bubbles thus the pump is self cleaning which reduces the down time heretofore necessary for cleaning the pump secondly the pump disclosed herein produces a sudden pressure wave of fluid through the conduit in addition to augmenting the self cleaning feature of the pump this sudden pressure wave produces enhanced positive valve action each individual conduit of the pump may be adjusted to produce a different quantity of fluid flow this may be accomplished simply by adjusting the volume control screws 14 thus repositioning the overlying conduit in relation to the hammer head and if a finger adjustment of the relative fluid flow through the various conduits is desired a separate striker plate structure may be provided for each conduit with this modification of the construction shown in the drawings a three way adjustment of fluid flow may be provided for each conduit independently of the other conduits in other words with such an arrangement fluid flow for each conduit can be controlled by 1 adjustment of volume control screws 14 and or 2 adjustment of the frequency at which the hammer head strikes the conduit by for example increasing the speed of rotation of the rotor 25 and or 3 adjusting the magnitude of the energy impulses by.