Aspirator water is a device used to create a vacuum in a laboratory setting. It works by utilizing the flow of water to generate a vacuum. The water is pumped through a narrow tube, creating a low-pressure area that draws air into the tube and creates a vacuum.

The vacuum generated by the aspirator water can be used for a variety of laboratory tasks, such as filtering liquids or removing gases from a system. Aspirator water is a simple and low-cost alternative to mechanical vacuum pumps and is commonly used in schools and small-scale research laboratories. It is also used as a backup or emergency source of vacuum in larger laboratory setups.