Problem with top of liner

[Garrin]

Howdy all,

I've got an insert running through a 20x20 clay tile flue.

I fabricated (if you can call it that) a cap and cut a hole to accommodate my 6" liner, then used a worm gear clamp to secure the liner at the top. I've still got a multiflue cap that fits over this and two other flues (one for basement fireplace another for water heater).

At some point last season (near the end) the clamp slipped and the liner fell about 3" through the cap.

Any ideas on the right way to fix this?

Let me know if more information is needed.

Thanks in advance,
Garrin

 

[EbS-P]

How much was sticking out the top of the cap above the hose clamp when installed?

 

[Garrin]

Not much at all. I went for a 15' liner with a 15' flue.

 

[Garrin]

I should clarify that I've only got about 4" clearance from the clay flue to the multiflue cap.

 

[Garrin]

My thought is just to get a thicker gauge piece of metal and cut a slightly more-tight hole, pull the liner up, and clamp it again but also tighter.

 

[EbS-P]

This is the correct solution

https://a.co/d/avcqRuP

I’m not sure how to make that work you need to keep water out and hold the liner. Maybe a 6” splice piece?

 

[Garrin]

My only concern would be that the extension on top would put me within an inch or so of the top of the multiflue. Is that not cool?

 

[EbS-P]

My only concern would be that the extension on top would put me within an inch or so of the top of the multiflue. Is that not cool?

That’s a valid concern. You have to get it high enough to secur it. You don’t need to add anything on top of this. I’d make some right angle “feet and secure to this

Flexible Chimney Liner to Liner Connector - Female to Male Coupler - Rockford Chimney

Stainless steel, dripless flexible liner to liner connector features butt welded seams. Female to male ends connect from flex liner to almost anything!

www.rockfordchimneysupply.com

 

[Garrin]

I like that idea. I think that'll be tall enough not to need a splice either.

Think I could silicone where it meets my cap or should I use something else?

 

[EbS-P]

I like that idea. I think that'll be tall enough not to need a splice either.

Think I could silicone where it meets my cap or should I use something else?

I’d use high temp black rtv. Under the multi flue cap it probably stays pretty dry stoping hot air leaving the chimney will help keep the house warmer if you use a block off plate.

 

[EbS-P]

I like that idea. I think that'll be tall enough not to need a splice either.

Think I could silicone where it meets my cap or should I use something else?

I’d use high temp black rtv. Under the multi flue cap it probably stays pretty dry but I’d seal it for air flow.

 

[Garrin]

Got that adapter ordered. I'll grab some L-brackets and bolt them on once it arrives. Thanks for all the help!

 

[Woody Stover]

Storm collar might be useful.

https://www.efireplacestore.com/vnt-vdv-sc04.html?campaignid=20664843968&adgroupid=169825665812&gad_source=1&gclid=EAIaIQobChMI6Nev28ayiQMVakb_AR3qlQVjEAQYASABEgLn-_D_BwE

 

[Garrin]

Potentially stupid mistake:

Got frustrated that the female end wouldn't fit into my liner, so I just flipped it without thinking much. However, now I've got this gap between my liner and the adapter.

Should I yank and flip it while the rtv isn't set?

 

[Garrin]

Also realizing the way I did this means it'll still be too close to the multiflue cap.

 

[Garrin]

Options:

- I could try to use milpak or something to fill the gap and sawzall/angle grind the top of that adapter to get another couple inches between the top of the adapter and the multiflue cap.

- I could go take off the adapter, clean up the flue cap, then just semi-begrudgingly go for three single-flue caps. That'd solve both problems.

- I could seal with milpak or something and then buy a taller multiflue cap. Downside: expensive and a lot of work to install. I could also try to fabricate some sort of extension for the mesh sides of my multiflue cap.

Sorry to spam the thread y'all, thanks again.

 

[EbS-P]

Seal the gap between liner and adapter with rtv. Tou don’t want creosote running down the outside of the liner. That would make cleaning really hard/impossible smelly a d dangerous. Take an angle grinder to the adapter and cut to length.

Other options is to cut a hole in the multi cap and then add screen to hole.