A process includes inserting a valve cartridge in a fitting of a yoke. The process also includes placing a ring around the fitting after inserting the valve cartridge in the fitting. The process also includes placing a nut around the fitting after placing the ring around the fitting. The process also includes threading the nut onto the fitting after placing the nut around the fitting. The process also includes tightening the nut against the ring. The process also includes pressing a handle onto the ring after tightening the nut against the ring.