You can't easily siphon gas out of modern cars because they're built with one-way valves meant to let fuel easily flow in but ...

Scientists have dusted off the mechanics behind a 100-year-old valve and are reimagining it for use in current and future technology. The device, originally known as a “valvular conduit,” was invented ...

: I have a problem with my sprinkler system. 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 ...

Heart valves allow blood to flow one way and prevent it from flowing in the wrong direction. The tricuspid valve controls blood flow between the right atrium and right ventricle. The bicuspid or ...