1.   In a metal joint, a rubber washer is positioned between the flange and the mouth of the trap to form an airtight seal as the nut is tightened.

2.   In joining the pieces do not forget the rubber washers.

3.   Some of the connections will have rubber washers.

4.   The handle is connected to the top of the stem, and a rubber washer is on the bottom.

5.   There are usually rubber washers at each end of the trap.

6.   This lifts the rubber washer off the mouth of the valve and allows water to flow through.

7.   You should replace all the fittings, including the rubber washers, even if they look good.

8.   Twice, red rubber washers popped off connectors and began floating away, but Barry caught them.