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.

The vacuum in Bathmate Hydropumps is created by the elastic recoil strength of the bellows gaiter pump, so you cannot exceed the safe partial vacuum levels allowed under European and USA medical regulations.

Traditional air pumps have been around for a long time so the basic concept of penis enlargement is not new. What is new is that the Bathmate range of pumps work in water rather than air.

This has BIG advantages.

AIR

Under pressure, air is inconsistent and unpredictable. When air is removed from a vessel, an uneven vacuum is created, which can lead to bruising, bending and bulging

of the penis.

WATER

Water is consistent under pressure. When water is expelled from the vessel, an even vacuum is created around the entire length and girth of the penis. This creates an even, solid cushion around the penis and allows for uniform expansion without bruising, bending or bulging, often associated with the use of air pumps.