I can receive CCTV9 with both Video and audio. Do you have audio before? How about your video signal quality.
My old apartment have same situration the video quality very bad and no audio it is due to received signal too weak.
About the water support I don't know because I seldem use it. I am not all the time living in RC because Hang Cheong is not yet finished by apartment and right now still in very bad situration.