please help! need thimble advice.

[charliesal7]

Hi, I am trying to bring an 8 inch single wall stovepipe through a wall. I bought a thimble that says it is 8", but the hole on the thimble is about 10 inches. Is there supposed to be a gap of air between the thimble and the pipe so the pipe does not actually touch the thimble?

Any help would be great. thanks

 

[webby3650]

The thimble is for 8" chimney, which measures 10" on the outside. You never want to run single wall pipe through a wall. It's neither safe or permitted by code or insurance. Stop drop and roll!

 

[charliesal7]

i was thinking i might need to replace with a double wall. do you know why the hole for a 8" thimble is 10" wide?

 

[begreen]

It's 10" wide because 8" ID chimney pipe is typically 10" OD in diameter. What pipe is being currently used for a chimney?

 

[webby3650]

i was thinking i might need to replace with a double wall. do you know why the hole for a 8" thimble is 10" wide?

8" chimney measures 10" on the outside. It's for double wall class A chimney.