A pump adapted to be attached between a reservoir and an inflatable penile implant of an implantable penile prosthesis includes a pump body connected between a pump bulb and tubing that is attachable to the reservoir and to the inflatable penile implant. An inlet valve and an exhaust valve are disposed within the pump body between the pump bulb and the tubing. A deflate valve is disposed within the pump body between the inlet valve and the tubing. The deflate valve includes a valve stem connected between a spring stabilizer and a valve surface. An aperture is formed to extend entirely through the deflate valve.
