The Henny Penny 21800 Check Valve 3/4" helps maintain proper fluid flow and prevents unwanted backflow in compatible foodservice equipment. This check valve is a flow-control component designed to allow liquid or pressure to move in one direction while restricting reverse movement. It operates automatically as flow conditions change, opening when fluid moves in the intended direction ... https://partsfe.ca/valve-34-check-for-henny-penny-part-21800