ORDERING OF SENTENCES: S1: A water tap is a device for turning on and off a flow of water. S6: The washer is made of a flexible material such as rubber or plastic. P: The metal parts of a water tap are usually made of brass because brass resists corrosion. Q: The other part is a washer which is fixed to the bottom of the rod. R: One is a rod with a handle on the top. S: It has two important parts. The correct sequence should be: