Check valves allow water to flow in only one direction, preventing backflow and ensuring system efficiency Historically, ...

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.

Look out for one-way valves located in your bilge-pump overboard discharge hose. The intended purpose is to prevent the water left in the bilge hose from flowing back into the boat after the pump ...

Endobronchial valve management has emerged as a minimally invasive intervention for the treatment of persistent air leaks and fistulas, conditions that are often associated with considerable morbidity ...