3 Installation 153.1 General notes on installation ......................................................................................... 153.2 Storage and transport .................................................................................................... 153.3 Typical measuring point ................................................................................................. 163.4 Installation order............................................................................................................ 173.4.1 Mounting of the sludge level meter...................................................................................... 183.5 Installing the cleaning unit (optional) ............................................................................ 243.5.1 Installation of the water hose to cleaning unit..................................................................... 25