Set up as shown. The two heat resistant hoses are used to feed steam into the chamber holder and release it into the sink. The steam chamber is filled one quarter to one half with distilled water.
Distilled water is used to minimize water deposits in the steam chamber and the pressure chamber.
The third hose is hooked to the air supply and left for later in the demonstration. Adjust the lens for good focusing on the side screen. The liquid-gas interface will be clearly seen. To demonstrate, heat the water in the steam chamber to boiling. This will take several minutes depending on the amount of water in the steam chamber.