Insulation coupling (RID 1824311) made of metal, avoids electrolysis between 2 different metals in contact with each other in an installation.
The insulating coupling should be screwed directly to threaded connection of the cold and hot water inlet and outlet of the water heater. Ensure that the steel outlet of the water heater is connected to the steel part of the coupling and that the pipe of red copper or brass is connected to the brass part of the coupling.
The
complete installation and commissioning instructions can be found in the manual
under “Downloads”.