Connecting a 4" flue to a 5" stove?

[WotEver]

Just keep scraping and chiselling the gap. Eventually you’ll free whatever it is that’s holding it. 

[rusty69]

Had trouble getting ours out in the past, and have resorted in cutting the pipe in half and removing the feet from the stove and dropping it from the stove collar. 

Good luck. 

[bizzard]

If its dangling with no stove under it, be careful, if it suddenly drops, they don't half drop with a thump, and can damage hearths, floor. Put a pile of cushions or something beneath it. Go easy waggling it and banging, cast iron collars can crack quite easily. Just chip away calmly and easy. You could pour a drop of vinegar down around it, might help.  A good plan also is to stick a long pole down through it so that when it does let go it won't fall over and bust things inside the boat.

Edited October 16, 2017 by bizzard

[jhodgski]

Thanks for the replies. What I could do is take the feet off the new stove, trim the flue and then put the stove in place, and then put the feet back on, but I'd really like to get the flue right off as it really needs rubbing down and respraying.

So I'm wondering if it may be a good idea to remove the flue+collar together, then hopefully I'll be able to get a bit more purchase on them once they're on the ground?

Then, if necessary, I could apply heat to the collar before trying to prise it off?

I'll take it easy with the collar, but is it OK to give the flue a few whacks?