Better N Bens

[bholler]

Well to start off that adapter needs to be stainless not plain steel. And it should fit down inside the hole. If you are going to do it that way i would cut slits and bend tabs out on the bottom to create a flange. Then cut out a circular trim piece to go over it. Attach it all down and as long as you do it right that should be pretty tight. But get a stainless piece not that one

 

[Firefigter148]

Why SS? This is rated for flue. Also why a flange or inside

 

[bholler]

Why SS? This is rated for flue. Also why a flange or inside

No that is rated for connector pipe. If you are putting the surround up legally you cant use black pipe there. But even if it will be exposed you want something that will last not something you will be needing to replace every few years. The best option for the adapter would be if you could slide it into the stove collar that would be the correct way and any thing that was running down the pipe would then end up in the stove not on top of it. But if that is a non standard size and you cannot fabricate one to fit like we do then a flanged boot would be the next best thing. The way you have it now there is no real seal there and any sealant you use will be temporary in that application.