Method for collecting rainwater for secondary domestic use has particle filter and storage tank with fill level sensor which switches system to potable supply when empty

摘要

The house storage tank (9) supplies water for toilets, washing machines and watering use through an outlet pipe (12) and is filled from the rainwater tank (1) having a filter (5) below the fill pipe (3). The fill level sensor (14) switches to a fresh water supply if the tank is empty. An overflow pipe (6) directs rainwater to the drain system when the tank is full and a filter cleaning supply (16) is also provided.