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.
Flush the Water Heater. To flush a hot water tank, turn off the power supply for electric heaters or turn the gas knob to pilot mode first. Turn the cold water inlet valve off to the water heater. Connect a common garden hose to the drain valve at the bottom of the water heater to drain the tank. Lead the hose outside.