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.
Turn to power OFF to the water heater at the circuit breaker (electric heater ) or main gas line (gas heater). 2. Fasten a length of garden hose to the drain valve at the bottom of the heater. Put the other end of the garden hose. in the nearest floor drain or snake it outside the home. 3. Close the shut off valve at the cold water inlet line. 4. Open the temperature and pressure relief valve at the top of the heater. Now open the drain valve and allow the. water to drain. You will probably notice some small white particles (called scale or sediment) during the early. stages of the flow. 5. When the water stops, close the drain valve and remove the hose. Also close the temperature and pressure relief. valve at the top of the heater.