I'm working on this gas water heater with 3" hood almost attached to an elbow that reduces from a 4" exhaust flue. This was only attached by a lot of aluminum tape. The problem is that the ends of both sides are exactly the same size. What parts do I need to do this properly?
Here is a picture of the current situation
Best Answer
There are 3" coupling made for this. They are available at home stores and heating ans AC supply stores.
You'll probably need a few sheet metal screws or go back to some aluminum tape.