I don't know what this is.

We had a manabloc system in a Monaco Windsor years ago. It worked okay. The only disadvantage I saw to it is that because of bringing all the water lines to a central position, the lines to any given fixture are longer than when the standard system is used. This meant that we had to run the water a lot longer if we wanted hot water. Since we normally run off the water in our tank, this was a monor disadvantage to us. Other than that, the system worked fine.

Ed Headington