Rico in Spanish means rich in English just if your talking about money. If your talking about food rico means it's delicious, good, etc. Example, esto huele rico mean this smell good or  que Rica la comida means like delicious food in English. Puerto Rico means Rich Port in Spanish.
Tankless or demand-type water heaters heat water directly without the use of a storage tank. Heat pump water heaters move heat from one place to another instead of generating heat directly for providing hot water. Solar water heaters use the sun's heat to provide hot water.
Most water heaters come with a drain valve at the bottom of the tank that you can open. This valve will drain the sediment out of the tank (this should be done occasionally to keep the tank clean and operating well). In a self-cleaning water heater, youâll find a curved dip tube in the tank instead of a straight one. This dip tube will be equipped with a fitting that swirls the water around instead of simply dispensing it to the bottom. By swirling the water, it keeps the sediment moving and requires less draining.