Escutcheon needed for 4" boiler flue

[abenn]

The escutcheon (collar, gaiter ??) split and fell off my gas boiler flue where it exits through the outside brick wall. I've googled and can't find anything like it -- maybe because I'm using the wrong terminology.

It appears to be made of some kind of rubber, maybe silicone, and is a tight fit on a 4" o.d. flue pipe. I suppose a metal one would do the job just as well, but I can't find anthing other than small ones for water pipes. Can anyone help me with a source please?

 

[thomp1983]

Try boiler flue collar

 

[abenn]

Thanks thomp1983. I tried 'collar' and it eventually led me to a 'rosette' which looks like it'll do the job

 

[Madrab]

Looks like they used the internal one given the UV breakdown, try 'boiler flue sealing collar', you might find a few more.

 

[muggles]

These make for a nice finish

FlueSnug 100mm Black | Toolstation

Replaces the need to make good around a boiler flue with mortar or plaster where it exits a wall. Creates an airtight, professional finish in seconds and can be used both internally and externally. Endorsed by leading boiler manufacturers.

www.toolstation.com

 

[CBW]

Try this. If you use @muggles suggestion, you might need a gas safe registered engineer

 

[abenn]

Thanks to everyone for the suggestions.

You may be right about the old one being an internal one Madrab, though it has lasted maybe 20 years.

My flue is sealed with mortor, so no gap between pipe and brickwork for your suggestion muggles. Seems like mine is only decorative.

The one in your link CBW is the one I found using thomp1983's search phrase, and I've emailed them to confirm it's for a 4"/100mm flue pipe.