A multiple-pump removable pump system comprising: a pump enclosure for receiving a plurality of removable pumps, the pump enclosure having at least a front panel, a rear panel, first and second side panels (20,22), a bottom panel, and a removable top panel, the panels defining a pump enclosure interior space, wherein the rear panel includes a plurality of openings and at least one horizontal lip disposed above the plurality of openings, the lip having a plurality of slots formed therein so that one slot is positioned above each of the plurality of openings; and a plurality of removable pumps at least partially disposed within the pump enclosure interior space, each removable pump including a pump housing having an internal pumping chamber, an inlet port and an outlet port, each of the ports being in flow communication with the pumping chamber, a spring biased retainer pin received within a retainer pin hole formed on an outer surface of the pump housing, a pump motor, and a pumping mechanism driven by the pump motor and at least partially disposed within the pumping chamber, the pumping mechanism being capable of receiving a fluid through the inlet port into the pumping chamber at a first pressure and discharging the fluid from the pumping chamber through the outlet port at a second pressure which is greater than the first pressure, wherein the pump motor and at least portion of the pump housing are disposed within the pump enclosure interior space, the inlet port and the outlet port extend through one of the plurality of rear panel openings, and a portion of the retainer pin extends through one of the rear panel slots so as to retain at least a portion of the removable pump within the pump enclosure. a pump enclosure for receiving a plurality of removable pumps, the pump enclosure having at least a front panel, a rear panel, first and second side panels (20,22), a bottom panel, and a removable top panel, the panels defining a pump enclosure interior space, wherein the rear panel includes a plurality of openings and at least one horizontal lip disposed above the plurality of openings, the lip having a plurality of slots formed therein so that one slot is positioned above each of the plurality of openings; and a plurality of removable pumps at least partially disposed within the pump enclosure interior space, each removable pump including a pump housing having an internal pumping chamber, an inlet port and an outlet port, each of the ports being in flow communication with the pumping chamber, a spring biased retainer pin received within a retainer pin hole formed on an outer surface of the pump housing, a pump motor, and a pumping mechanism driven by the pump motor and at least partially disposed within the pumping chamber, the pumping mechanism being capable of receiving a fluid through the inlet port into the pumping chamber at a first pressure and discharging the fluid from the pumping chamber through the outlet port at a second pressure which is greater than the first pressure, wherein the pump motor and at least portion of the pump housing are disposed within the pump enclosure interior space, the inlet port and the outlet port extend through one of the plurality of rear panel openings, and a portion of the retainer pin extends through one of the rear panel slots so as to retain at least a portion of the removable pump within the pump enclosure.