Abstract: An external catheter includes a groin piece that is anatomically shaped to a user's pelvis and rests on the user's pelvis. A flange extends from the groin piece and defines an opening through the groin piece. The opening is sized to receive the user's penis therethrough. At least one indentation is formed at least partially around the flange. A removable tube is attached to the flange. The tube is sized to receive the penis extending through the opening. A locking ring is positioned in the at least one indentation to secure the tube to the flange.