A vacuum water pump, also known as a vacuum pump or water aspirator, is a device used to create a vacuum or low-pressure environment by removing air or other gases from a closed system. While there isn't a specific type of water pump called a "vacuum water pump," there are various types of vacuum pumps that can be used in conjunction with water to create a vacuum.

One common type of vacuum pump that utilizes water is a water-ring vacuum pump. It operates by using a rotating impeller within a cylindrical chamber partially filled with water. As the impeller rotates, it creates a liquid ring by centrifugal force, which acts as a seal and forms a continuous vacuum within the chamber. The water also helps to cool and lubricate the pump during operation.

Another type of vacuum pump that can use water as a medium is a steam ejector or jet pump. This pump uses steam or water vapor to create a vacuum by entraining and compressing the gases within the system. Water can be introduced into the pump to condense the steam and enhance the vacuum generation.