Before installing flange rubber joints, the pipe to be connected should be put on a flat horizontal surface. At first, the end of the tube fixed should be put flat, then rotate the flange of rubber joints to make the flange holes aligned, put on screws and screw on the nut, then make the flange on the other end of the pipe horizontal with the flange of rubber joints, rotary flange of rubber joints to make the mouth of the flange relatively, put on screws and screw on the nut, tighten the nut to make them densely connected on horizontal direction to prevent sealed and lax circumstance.
