A coupling for fluid pathways, such as for use in connecting showerheads to a fluid source. The coupling includes a fixed member, a movable member rotatably connected to the fixed member, and a locking assembly connected to the fixed member and received within the movable member. In response to a rotational force exceeding a predetermined threshold the locking assembly permits rotation of the movable member relative to the fixed member and when the rotational force drops below the predetermined threshold, the locking assembly prevents rotation of the movable member to the fixed member.