The filter beds of Shek Lei Pui Water Treatment Works in Butterfly Valley. There are altogether 32 filter beds arranged in four sets with one set on each side of the east and west wing of the station.位於蝴蝶谷的石梨貝濾水廠內的濾水池，共有32個，分成四組，每組分別設於大樓東、西翼的兩邊。