Rheem electrical water heater drainage

[Sjking]

Need some help draining the above heater. The draining outlet is connected to a non return valve and inlet. Do i unscrew this Draining outlet or is there another way?
Thanks in advance
Si

 

[hj]

That appears to be the cold water inlet for a "bottom supplied" water heater. Whoever connected it did NOT know he had to install a tee with a drain valve. You have to "redo" the connection to install the valve but will probably get very wet doing it.

 

[Sponsor]

 

[Dj2]

You might as well drain the WH to do what the above answer suggests...also you will have a hard time soldering a wet pipe.