Water Dispensers, namely domestic and commercial bottle water dispensers, water purification units and equipment, namely, bottle water dispensing systems having water purification equipment thereon to render water potable, namely, water filters, sediment filters, chemical filters, bactricide dispensers for dispensing a bactricide into the water prior to final filtration, ozonators for adding ozone to the water for purification, UV light emitters for radiating water with Ultraviolet bandwidth light for purification, and conversion kits for converting off-the-shelf bottle water dispensers into combination water dispenser/water purification units, and conversion kits for converting off-the-shelf bottle water dispensers into automatic filling dispensers wherein a controlled water source is tapped into the bottle water dispenser utilizing equipment, namely tubing, valves, connections, and water filters