According to an aspect, an inflatable penile prosthesis includes an inflatable member, a reservoir configured to hold fluid, and a pump assembly configured to facilitate a transfer of the fluid from the reservoir to the inflatable member when in an inflation mode, and facilitate the transfer of the fluid from the inflatable member to the reservoir when in a deflation mode. The pump assembly may include a pump, and a valve body defining at least three ports operatively coupled to the pump such that three separate fluid channels extend to the pump. The valve body defines at least one port operatively coupled to the reservoir, and at least one port operatively coupled to the inflatable member. The pump assembly includes a spool configured to move within the valve body to switch between the inflation mode and the deflation mode.
