We might not think much about the evolution of plumbing systems in the last few decades, but there are various technological and modern appliances making a way in modern homes. For example, touch-free plumbing systems where the faucets and toilets automatically turn off & on without touching are becoming increasingly common in newly constructed buildings. These sensor-equipped restrooms and bathrooms are proving cost-effective and convenient for homeowners. Another is a tankless water heater, heating water when needed, providing an environment-friendly and energy-saving option better than conventional water heaters.