A rainwater harvesting system comprising an auxiliary water storage tank and float valve

摘要

A rainwater harvesting system, comprising one or more supplementary water storage tanks 1 to store and automatically release harvested rainwater. The rainwater is released on activation of a water closet flushing mechanism 7 in preference to a mains water supply 10. When the rainwater is exhausted, ball cock 12 operates and allows the mains water supply to fill the tank 1. The system comprises a filter 4 for filtering the incoming rainwater and may also comprise a releasable observation porthole for maintenance to the stop ball cock 12.