The initial flow of water, which has cooled in the lines, is diverted back into the cold water lines and stored (either in a pressure tank [System A] or a rainwater or other suitable container [System B]) for reuse.
When water arrives at the correct temperature the thermal valve switches, directing the hot water immediately to the spout or shower rose. The first drop of hot water out is at the right temperature, and the cooled water is automatically saved.
System A: (Shown with two taps assembly)
Saves cold water within system.
System B: (Shown with ‘flick mix’ assembly)
Saves cold water to a rainwater tank or other suitable container.
Note: Both systems (A and B) are suitable for use with either two-tap or flick-mix tap assemblies.