21.   Because no other force of pressure in involved, grease, dirt, soap of hair easily accumulate to stop the water flow.

22.   Because no other force or pressure is involved, grease, dirt, soap or hair easily accumulate to stop the water flow.

23.   Ball-type faucets control water flow with a hollow ball.

24.   Because the water flow is less, often half the regular flow, aerators also help conserve water.

25.   Before attempting to replace a supply pipe, close the shutoff valve to stop the water flow.

26.   A giant restoration project there aims at saving the Everglades and Florida Bay by bringing back the natural cycle of water flow.

27.   A water hammer is caused by pressure changes in pipes as water flow is stopped and started.

28.   Allow the valve to remain open until all the air escapes and only water flows out, then close the valve.

29.   But some worry that the drilling could interfere with hopes of eventually restoring natural water flows into the Everglades.

30.   But the park is at the mercy of water flow from the north.