Anti-twist Adapter is composed of two parts: the thread port and the pagoda head. When the adapter is tightened or loosened, the tube does not rotate with the joint, and a step plane is left at the male threaded port, face-to-face contact is sealed by thread extrusion. The adapter is made of PP/PPS material, 1/4-28 UNF non-toxic and odorless food-grade material.