At the front of my house are two sprinkler pipes that come out of the ground and are connected by some type of valve. This valve is leaking and I need to fix it. Tell me how.

The science pros at TKOR explain how to make a cheap and simple one-way check valve.

BRIDGETON, New Jersey (WPVI) -- A small device is having a big impact on the quality of life for some emphysema patients. We learn how these tiny one-way valves got a local woman back on her feet. ...

An experimental procedure using one-way valves to achieve lung volume reduction shows promise for an emphysema patient. Emphysema, a lung disease usually caused by smoking, damages air sacs in the ...

The one-way valve can create an air gap in the line, making it impossible for some pumps to prime. Tom King. Look out for one-way valves located in your bilge-pump overboard discharge hose. The ...

A Tesla valve (above) creates one-way flow without backflow or moving parts. A shark’s spiral intestine (below) has a similar structure. Samantha Leigh / California State University, Dominguez Hills ...