1.   Constantly running water through gravel means that any hardness will be leached into the water.

2.   She sipped water all the way through the interview.

3.   They could feel the chill of the water through the rubber of their Wellington boots.

4.   This type of system works by pumping pond water through a quartz tube running parallel to an ultra violet germicidal lamp.

5.   Topping up is by a hose, placed soas to pass water through the filter before reaching the pond.

6.   They flush clean water through the pipes once a day.

7.   Plants release water through their leaves by transpiration.

8.   A pump circulates the water through the filter.

9.   He examined small grains on the surface of water through a microscope.