One-Way Valve Replacement Part

The "Duckbill" one-way valve stops beer from flowing into the stainless steel tube and down to the one-hitter bowl while you do a Knockout.

 It works by staying closed when beer tries to flow through and by opening when air and smoke try to flow through in the opposite direction.

The main purpose is to stop beer as to keep your herbs dry in the one-hitter bowl.