Toilets have such new features as a tank concealed in the wall and built in odor control. New residential toilets must be 1.6 gallon. Many architects, however, do not find this amount of water satisfactory, and find their clients must flush two or three times to evacuate waste.
New models function better, requiring fewer flushes.
New technology for showers involves valves for balancing temperature and volume, and faucet finishes. An antiscald valve is required in some states. Pressure-balancing valves track pressure changes in the hot or cold lines and adjust the water pressure accordingly. Thermostatic valves monitor pressure and temperature changes. Faucets with the new ceramic disk valve last much longer than the old metal and rubber fittings.