Water dispenser

A water dispenser having a week-day operation mode and a holy-day operation mode, the dispenser comprising:

• a pressurized water feed line for receiving pressurized water from a pressurized water inlet;
• a water treatment unit, in selective liquid communication with the pressurized water feed line through a first electromechanical valve fitted in the pressurized water feed line, the water treatment unit being configured to remove one or more contaminants from the water to obtain treated water;
• a main water feed line, being in liquid communication with said water treatment unit to receive said treated water;
• a cold water reservoir, configured to receive treated water from the main feed line through a first feed line, the cold water reservoir being in selective liquid communication with the first feed line through a second electromechanical valve fitted in the first feed line;
• a cold water dispensing nozzle, in liquid communication with said cold water reservoir, configured for on-demand dispensing of cold water;
• a hot water reservoir, configured to receive treated water from a second feed line, the second feed line being in selective liquid communication with the main feed line through a check-valve fitted between said main feed line and said second feed line and configured to permit passage of water from the main feed line to the hot water reservoir through the second feed line;
• and
• a hot water dispensing nozzle, in liquid communication with said hot water reservoir, configured for on-demand dispensing of hot water via a third electromechanical valve;
• during operation in week-days mode:
• (i) said first, second and third electromechanical valve being operated electrically on demand of cold or hot water, and (ii) the check valve permits passage of water from the main feed line to the hot water reservoir through the second feed line;
• and
• during operation in holy-day mode:
• (i) said first, second and third electromechanical valves being operated mechanically, and (ii) the first and second electromechanical valves being mechanically coupled one to the other, such that mechanical opening the first electromechanical valve occurs at a delay from mechanical opening of the second electromechanical valve, the opening of the first electromagnetic valve at said delay from the second electromagnetic valve causes reduction in water pressure in the main feed line during dispensing of cold water from the cold water reservoir, thereby maintaining the water pressure in the main feed line below a pre-determined pressure threshold, such that the check valve is maintained closed to prevent water flow into the second feed line.