Hello,
Could any of the forum members suggest the easiest way to get to the heat exchanger to clean it?

As I believe, the set of elements marked in green should be disassembled. The obvious thing is to unscrew the "red" nuts. However, I have a problem with the metal water supply tube (blue) that prevents the element from being pulled out. Can I unscrew it, or is it better (easier) to disassemble another element?
Could any of the forum members suggest the easiest way to get to the heat exchanger to clean it?

As I believe, the set of elements marked in green should be disassembled. The obvious thing is to unscrew the "red" nuts. However, I have a problem with the metal water supply tube (blue) that prevents the element from being pulled out. Can I unscrew it, or is it better (easier) to disassemble another element?