In case you cannot dispense water from the tap, then you need to first check whether the power supply is on. If it is on, then check if there are any fault indicators illuminated, or 'CHANGE GKK' and the Call Centre Number is illuminated on the Digital Display Panel. Call the Pureit helpline and get either the fault resolved or Germkill Kit replaced. If none of these lights are illuminated on the Digital Display Panel, then check if the Ball Valve is closed. If none of these cases are true, then please call Pureit Helpline for assistance.