The Science

The Bathmate Hydro Pump works by replicating the natural process of nocturnal erections. During sleep, particularly in the REM (rapid eye movement) phase, men experience multiple spontaneous erections, known as nocturnal penile tumescence (NPT). These night time erections are the body's natural mechanism for maintaining penile health by encouraging blood flow and oxygenation to the tissues.

When the penis becomes erect, it brings fresh, oxygen-rich blood into the tissues, helping to keep the smooth muscle and endothelial cells in the corpus cavernosum healthy and functioning properly.

The Bathmate Hydro Pump replicates aspects of this natural process by using controlled vacuum pressure to induce an artificial erection.

How It Works

The Hydropump functions by creating a vacuum seal against the pubic area of the user, enclosing the flaccid penis. When the pump is pushed against the body, the bellows compress and water is ejected from the end of the pump via the open valve.

When released the bellows expand and the valve closes, creating a partial vacuum inside the pump. This causes the penis to expand and fill with blood, creating an erection. Re-pumping increases the vacuum, and so increases the size of the erection.

The level of vacuum is controlled by depressing the valve inwards against the spring, opening the valve and allowing air or water back into the body of the pump, thereby partially or fully releasing the vacuum.