DISCONNECT BEER FLOW CONTROLDisconnect Beer Flow Control This Intertap liquid disconnect is made out of 304 stainless steel. It features flow control functionality allowing you to restrict the flow before the beer enters the beer line. Doing so ensures that the head pressure created by the beer line keeps the carbonation in the solution and provides far more resistance to foaming issues. The black O Ring is intended to be used to identify it as a beverage disconnect.