An implantable system for erectile dysfunction treatment includes an implantable pump having an inlet and an outlet port. The inlet port is configured to receive blood from an artery within the body. The outlet port is configured to receive the blood from the inlet port and deliver that blood to an artery having a direct or indirect path to the corpora cavernosa of the penis. Activation of the pump, preferably via manual compression or electrical activation, causes the transfer of blood and ultimately an erection. Upon conclusion of sexual activity, blood drains from the penis in a normal manner and returns the penis to a flaccid state. The pump preferably incorporates a non-return valve to prevent backflow of blood from outlet port to inlet port.