1.   And foreign steel companies use the United States as a pressure valve when their own market drops.

2.   As a public outlet for impulses that are suppressed in ordinary life, carnival was, and still is, a pressure valve for the frustrations of poverty.

3.   Chiles shows how the operators of the Three Mile Island plant relied on an indicator light that told them a pressure valve was closed.

4.   In town, the diesel engine switches off and a pressure valve opens.

5.   Look for the pressure valve on the house side of the water meter.

6.   Near the top of the hot water heater you should find a pressure relief valve, possibly fitted with a long downspout.

7.   Pressure valves send sprays of water into the air, representing gunfire.

8.   That forces the majority leader to compromise, acting as a kind of pressure valve, diffusing anger and frustration before it might build into a revolt.

9.   The adjustment screw on the pressure valve can be turned to regulate the water pressure coming into the house.

10.   The cure is to replace the pressure relief valve.