How can I effectively drain a Rheem water heater?

To effectively drain a Rheem water heater, follow these steps:

1. Turn off the power or gas supply to the water heater.
2. Connect a garden hose to the drain valve at the bottom of the heater.
3. Place the other end of the hose in a drain or outside.
4. Open the drain valve and let the water heater drain completely.
5. Close the drain valve and remove the hose once the water heater is empty.
6. Turn the power or gas supply back on and refill the water heater before turning it back on.