Question about chimeny flue

[palmettoinspect]

I wanted to post this picture and ask for some of your opinions. It doesn’t look right to me how these two pieces of the fireplace flue are lapped. Shouldn’t the lower piece be installed inside the upper piece? There were no signs of smoke or soot leaking in the chase or attic.

Thanks,

Kiel

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[Phillip]

It is lapped like it is suppose to be. It lapped that way so if there is a built up of the liquid form it will drain back into the fire place ,not to the outside of the pipe.

[Mike Lamb]

I called the manufacturer of a fireplace unit with this same question a few years ago and sent a picture. They said that is the way it is supposed to be. You could do the same thing if you know who makes it.