quick question on a glowing red exhaust liner tee

[jwscarab]

Still installing my new T6. But I remember 2 years ago I had a runaway fire in my DW2479 everburn only to find the short horizontal run and the cleanout tee to be glowing red - not sure of temps. I believe my stuff is 304ss. My tee is now kinda rainbow colored.

I bought a new black elbow and horizontal pipe to match my new T6. I was going to mate to old tee/flex.

Do I need to replace the tee cause of the overfire? Did I break down the material in any way? Or am I still good to go with old tee? Obviously still looks and feels stout - the whole setup is only 3 years old.

Thanks guys!!

 

[begreen]

I'd keep the tee if it is sound. Be sure to keep the horiz. pipe as short as possible and have it pitched uphill going to the tee.

 

[jwscarab]

Thanks BeGreen!! Your help is always appreciated!!

I am running a 90 elbow right off the T6, then a 18" horizontal into the tee. I have room to tilt up a tad. Then 32ft flex/ridgid to top. External chimney.

Was considering a damper in the 18" horizontal run too, what do u think on that?

 

[edthedawg]

Very likely no permanent damage from the prior overfire. At least nothing that will be a problem due to the continued service as stovepipe. 304 SS will sensitize from welding (higher temps and a MUCH faster heat-up involved there) but even with that, any effects of property degradation and/or corrosion susceptibility aren't likely to be tested by your stove.

 

[begreen]

I wouldn't put a damper on the flue unless necessary. My guess is the stove might be a bit balky at first until the flue warms up. If the flex is insulated that will help. Pitch the horz run up 1/4" per foot.

 

[karri0n]

What are the advantages of a tee vs an elbow? My stove is top vented with a 90 to another 90 that attaches to the liner.

 

[begreen]

Easier cleaning without disassembling any pipe. The bottom tee cap is just popped off for cleaning.

 

[jwscarab]

Thanks all for the help! I'll try it w/o a damper first. I hope to be up and running soon. A HVAC friend is going to help me form a block off plate then I am ready to burn.

 

[South of Boston]

What would cause the bottom T cup fill with water in a couple of week of buring pellets? Could it be some kind of condensation? THe vent runs thru the chimney and has a cap.