Don’t try to play games with the federal restriction on maximum flow rates.
I was asked to inspect a plumbing rough-in installed in a beautiful new home on the shores of Lake Michigan. The home was gorgeous, but the plumbing, well let’s just not go there.
As I hit the main floor, I was immediately drawn to the shower. There were two shower valves roughed-in for the shower. It wasn’t a large shower, so I asked, “I noticed the two shower valves, is there a reason for that?” The woman who owned the house smiled and responded, “For fun!”