He wondered how that worked; perhaps the squeeze opened a pressure valve.

And if the landslide dam held that long, then they would have their pressure valve.

That's where I'll start adjusting the pressure valve so we don't waste too much air.

"This is one of their political pressure valves," he said.

Firefighters said they spent at least seven hours the night of the fire trying to release the pressure valves on the water pipes.

"The pressure valve on the distiller is acting up again," he told her.

A 9-inch model of an oil well's pressure valve.

Volcanoes are pressure valves that release energy from deep within the Earth.

The doctor is slowly turning the pressure valve attached to the cuff.

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