Should a Sealant Be Applied to Stove Pipe Sections?

Yes or no? And if yes, what is your favorite type/brand?

I never saw the need for this. If your pulling anything over .01" WC, then sealant is useless. Maybe if your concerned about flyash from a puffback ... but flyash under that circumstance will come out of places you never knew existed.

Ask me how I know .....

But if I were to use anything it would be Permatex Ultra Copper RTV.

Never did but make sure you have the male end going towards the thimble.

Funny, I've always had the male end going towards the stove--wood or coal--it's worked well for 50 yrs I've never used any sealant at the pipe joints.

Richard S. wrote:Never did but make sure you have the male end going towards the thimble.

male to stove for wood due to creasote running back into stove

male away from stove so all coal gas goes into next section and out of living area..

I have on occasion used Rutland high temp stove pipe sealant by wiping a sealing bead around each joint after inserting and securing with 3 screws, just cause........ it has a 2000* rating......

I used foil tape on the EFM's pipe joints. The biggest difference I noticed is when I take the pipe down to clean out the flyash. With the seams taped I no longer get flyash shaking out the seams. That might sound trivial, but when you are trying to get eight feet of 8" pipe out of the basement without making a dust cloud...it makes a difference.

freetown fred wrote:Funny, I've always had the male end going towards the stove--wood or coal--it's worked well for 50 yrs I've never used any sealant at the pipe joints.

There is a chance you'll have a gap and if the male end is facing towards the the stove it could potentially leak.

Poconoeagle wrote:male to stove for wood due to creasote running back into stove.

Never heard that but then again I don't do wood stoves. Makes sense.

The paradoxical question is what if it's wood/coal combo.

markviii wrote:I used foil tape on the EFM's pipe joints. The biggest difference I noticed is when I take the pipe down to clean out the flyash. With the seams taped I no longer get flyash shaking out the seams. That might sound trivial, but when you are trying to get eight feet of 8" pipe out of the basement without making a dust cloud...it makes a difference.

I'm assuming you have elbow going into 8 foot section? If so use a T instead and cap the end, when it comes time for cleaning just use a shop vac. When we cleaned flue pipe we never disconnected it from boiler because the whole thing was accessible from either the T or the baro.

Yes, I have an elbow instead of a cleanout tee. No one had an 8" cleanout tee in stock when I installed the boiler, so it ended up with elbows on each end of the flue pipe. At some point I will swap them out for tee's.

if its wood/coal the answer is easy................

change your name to john and move to new jersey!

markviii wrote:Yes, I have an elbow instead of a cleanout tee. No one had an 8" cleanout tee in stock when I installed the boiler, so it ended up with elbows on each end of the flue pipe. At some point I will swap them out for tee's.

The T's are great. Instead of having to shut down to clean out fly ash, you just pop off the end cap, stick in the shop vac hose and your are back in business in about 30 seconds.

Poconoeagle wrote:if its wood/coal the answer is easy................

change your name to john and move to new jersey!

Hah! Good point.
In the beginning it was 1 wood stove and 1 coal stove, it didn't take long to see the light.