Comes with universal G1/2" threads. If our shower head doesn’t fit into the shower arm, please try rotating it at different angles. It will only screw in when the threads align perfectly.
It is recommended to take the shower head off the whole shower arm to replace the filter. Hold the panel part still and then rotate the rear part in a counter-clockwise direction to unscrew it. As this showerhead is relatively large, individuals with small hands may find it difficult to apply enough force to open it. You may seek assistance from someone stronger to help unscrew it.