On-demand hot water repurposing system and method

A fluid control system comprising:

• a source of hot water;
• a source of cold or unheated water;
• and
• a valve comprising:
• (a) a first input port adapted to receive a first flow of water from said source of hot water;
• (b) a second input port adapted to receive a second flow of water from said source of cold or unheated water;
• (c) an outlet port adapted to allow an output of water;
• (d) a valve member adapted to move between a first position and a second position, said valve member in said first position adapted to allow said first input port to be in fluid communication with said outlet port, said valve member in said second position adapted to allow only said second input port to be in fluid communication with said outlet port;
• and
• (e) a thermal actuator positioned to detect a temperature of only said first flow of water such that said valve member is adapted to be in said first position or said second position based on said temperature of only said first flow of water;
• wherein said valve member is adapted to be in said first position when said temperature of said first flow of water is below a predetermined threshold;
• and wherein said valve member is adapted to switch to said second position when said temperature of said first flow of water reaches said predetermined threshold.