But before you try it out, learn how to use a penis pump the right way. Make sure that your penis is erect and fully inserted within the cavity from base to tip. Apr 19, - A penis pump is one of several nondrug treatments for erectile dysfunction (ED). A penis pump is also known as a vacuum pump or a vacuum erection pump. But if you’ve been diagnosed with moderate ED, a penis pump may be a nondrug treatment option to consider.