| 摘要 |
<p>A Cistern 100 comprises an upper water tank 102 as a first chamber, and a lower water tank 104 as a second chamber connected by an opening 106. At the top of the upper tank 102 a mains water inlet 108 allows mains water into the tank through an inlet valve 110, which is under the control of an upper float 112. An auxiliary water inlet 114 allows water from an auxiliary supply (not shown), such as condensate from an air-conditioning unit, into the tank 102. At the bottom of lower tank 104 is an water outlet 116, which allows flushing water from the lower tank 104 to flush an appliance (not shown) under the control of an outlet valve 118. The outlet valve 118 is under the control of an actuator 120, which is configured to move up and down, and is also under the control of a lower float 122. The cistern is able to make use of condensate or other unwanted fluid that would otherwise be discarded. This allows a considerable saving of mains water.</p> |
