| 摘要 |
<p>A drainage fitting comprising a hollow member within inlet thereto and an outlet therefrom. A valve is positioned or positionable within the hollow member such that by operating the valve liquid flow through the hollow member can be substantially prevented or allowed. There is a second inlet to the hollow member which is positioned such that liquid entering the hollow member from the second inlet can be directed either through the outlet or through the first inlet by operation of the valve.</p> |
