Review on KES K1140B-CH: High-Quality G1/2 Brass Shower Head Shut Off Valve for Precise Water Flow Control - Chrome Finish by Petr Webster

Just what I never needed. I like to take a long shower (yes, I know) or shave in it and unfortunately the hot water doesn't last forever. Also, the water regulator in my shower SUCKS, if you move it a little you will scald or freeze. So once I get it to the right temperature it STAYS there which means I can't easily adjust the pressure. Enter this little gadget. I DO NOT NEED ultra high pressure water for anything other than rinsing - otherwise a nice gentle jet of hot water is welcome. I reach in and move the valve about halfway and it reduces the pressure significantly while still being quiet. A little more and he even shuts off the water entirely, although there is a slight noise at this point. Very happy with it. Now I can go longer in the shower without hot water because I'm less addicted. Everyone wins :)