I recently installed an aqua source single handle shower diverter for a tub and shower. I installed the unit in my new shower, after closing off the tub outlet. Like everyone else on this site i, had the severe banging, knocking, air hammer sound reverberationg throughout the house. Thought i was going to have to tear into the wall and replace the whole unit. But instead, i purchased a delta in2ition shower head for about $50. Now all there is a gentle spray with a sound like rainwater, coming from my shower head. Not even one knock since i installed the shower head about a week ago. Its too bad a product like the aqua source shower head is even on the shelf. For the $110. I paid for the aqua source, i could have purchased a much better unit.