Unfortunately Patrick did not diagnose the problem accurately. What should have been a simple installation turned into a wrecking job. He needed an assistant but didn't have one so I was deputized. The situation was unacceptable, the job left incomplete with a 12 x12 in hole in my wall and numerous other objectionable details. Then he said I needed a completely new showerhead. He was wrong. I needed a new hot water cartridge. Poor communications, poor business practices. Never again.