water supplied through pipes to taps/faucets in a building 自来水
Is the tap water safe to drink?
这自来水喝了不会闹病吧？
tap:
(especially BrE) (NAmE usually fau·cet) [C] a device for controlling the flow of water from a pipe into a bath/ bathtub or sink 水龙头；旋塞
bath taps
浴缸水龙头
the hot/cold tap (= the tap that hot/cold water comes out of)
热水／冷水龙头
Turn the tap on/off.
打开／关上龙头。
Don’t leave the tap running.
别把水龙头开着白白流水。
the sound of a dripping tap
水龙头滴答的漏水声