Has anyone pulled apart their sink mounted RV HOT WATER unit?
Ours is starting to make a grating sound when the mixer handle is moved left or right as though it's starting to seize up.

Scratchy,I have never done it myself but just out of curiosity,have you got an inline filter on the intake side of the unit?.FWIW,I would find out if there was a way to clean and flush the system before pulling it apart.Glenn.