Abstract: A cap assembly includes a body, a punch assembly, a safety ring and a connector strip. The body has a cap connector, a primary tube, a cover, a drive tube and a chamber. The primary tube is formed coaxially on the cap connector and has at least one annular seal. The drive tube is mounted on the cap connector and has multiple outer pawl teeth and multiple top pawl teeth. The punch assembly includes a drive cap, a punch tube and multiple upper teeth corresponding to the top pawl teeth. The punch tube is formed coaxially on and extends down from on the drive cap, is longer than the body and presses against the at least one annular seal. The safety ring is connected to the cap connector. The connector strip is connected to the punch assembly and has multiple inner pawl teeth engaging the outer pawl teeth.