What is another word for check valve?
Pronunciation: [t͡ʃˈɛk vˈalv] (IPA) 
Check valve is a device that permits the flow of fluid in one direction while stopping the backflow of fluid in the opposite direction. It is also known as non-return valve or one-way valve. Other synonyms include clack valve, reflux valve, retention valve, and backflow valve. The term "clack valve" refers to the sound produced by the valve when it closes. "Reflux valve" describes its ability to prevent the reverse flow of fluid. "Retention valve" highlights its capability to hold fluid in a particular section. "Backflow valve" emphasizes the valve's function of stopping fluid from flowing backward. All these synonyms aptly describe the function of a check valve.
