We are remodeling the bathroom and want to replace the shower/tub faucet with a water-saving one we had in a previous house years ago. There was a lever that allowed you to keep the water pressure and temperature at the shower head while shutting off the spray for soaping/shampooing, so you wouldn't have to turn the faucets off and on and re-adjust the temperature just to save water. We have been unable to find a system like this. Does anyone know of such a tub/shower water holding system??