Water purification apparatus and methods for cleaning the water purification apparatus

A water purification apparatus for producing purified water, the water purification apparatus comprising:

• a tank including at least one fluid level sensor;
• a pre-treatment fluid path configured to fluidly couple the tank to a fluid source;
• at least one valve located along the pre-treatment fluid path;
• a feed fluid path fluidly coupled to the tank and configured to receive fluid from the tank;
• a pump located along the feed fluid path for pumping fluid from the tank;
• a heater fluidly coupled to the feed fluid path and arranged to heat fluid from the tank;
• a recirculation fluid path fluidly coupled to the heater to receive heated fluid and transport the heated fluid to the tank;
• and
• a control unit configured to control cleaning of the water purification apparatus, the control unit being configured to cause the water purification apparatus to:
• cause the at least one valve to open to cause the tank to fill with fluid from the fluid source,
• receive a signal from the at least one fluid level sensor indicative that a fluid level in the tank has reached a predetermined level,
• cause the at least one valve to close after receiving the signal from the at least one fluid level sensor,
• cause the pump to circulate fluid through the feed fluid path, the heater, and the recirculation fluid path to heat the fluid to fulfill a temperature dependent disinfection criterion.