| 摘要 |
Pumped drainage apparatus ( 10 ) for a shower, comprises a waste water unit ( 12 ) having a waste water inlet ( 14 ) for accepting waste water runoff from a shower, and a waste water outlet ( 16 ) in fluid communication with the waste water inlet ( 14 ); a pump ( 20 ) in fluid communication with the waste water unit ( 12 ); a sensing circuit including one or more sensors ( 36 ) for sensing waste water; and a control circuit for controlling and varying a flow rate of the pump ( 20 ) based on an output of the sensing circuit. Preferably, the or each sensor is isolated to prevent in use contact with waste water. A variable flow control device ( 34 ) is also provided.
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