Step 4 · Clean Threads and Flush Pipe
With the arm removed, look into the threaded female fitting in the wall. Use a rag or a small brush, like an old toothbrush, to clean out any old thread seal tape, plumber's putty, or mineral deposits. After cleaning, place a rag over the opening and turn the shower water on for just 2-3 seconds. This will flush out any loose debris that could clog your new shower head. Turn the water off immediately.