Kevink1955
Member
Has anyone ever had a dielectric coupling (3/4 X 3/4 MPT) rust internally and restrict water flow
I have a Larrs/Bradford White RV 75 indirect that devolved a restriction to the DWW flow. When flowing DHW you can hear a hissing noise around the HW outlet on the top of the tank so I am thinking it's in the dielectric coupling the factory so thoughtfully installed.
There is a similar fitting on the bottom of the tank and attached to it is a combination water inlet and drain valve of a type I have never seen before. I wrote a question years ago about how to flush this heater when the cold inlet ant drain valve are in the same fitting. Opening the drain valve just flows water from the cold water line straight out the drain, nothing moves thru the tank at all.
Need to pull a few things apart but am looking for a direction to start in.
Thanks Kevin
I have a Larrs/Bradford White RV 75 indirect that devolved a restriction to the DWW flow. When flowing DHW you can hear a hissing noise around the HW outlet on the top of the tank so I am thinking it's in the dielectric coupling the factory so thoughtfully installed.
There is a similar fitting on the bottom of the tank and attached to it is a combination water inlet and drain valve of a type I have never seen before. I wrote a question years ago about how to flush this heater when the cold inlet ant drain valve are in the same fitting. Opening the drain valve just flows water from the cold water line straight out the drain, nothing moves thru the tank at all.
Need to pull a few things apart but am looking for a direction to start in.
Thanks Kevin