According to an aspect, an inflatable penile prosthesis includes a fluid reservoir configured to hold fluid, an inflatable member, and a pump assembly configured to transfer the fluid between the fluid reservoir and the inflatable member. The pump assembly includes a pump bulb, a valve body, a valve disposed within the valve body, a first fluid port configured to be fluidly coupled to the fluid reservoir, and a second fluid port configured to be fluidly coupled to the inflatable member. The valve is configured to move between an inflation position and a deflation position. The valve includes a first member and second member, the first member being configured to move with respect to the second member.