CLASS A CHIMNEY PIPE

[jimdeq]

I was fortunate to have a friend give me 18' of used Hart - Cooley class A stainless steel chimney pipe. The pipe is in very good condtion. My Tarm solo 60 has a 8 inch pipe discharge ,but the class A that I received is only 7 inch. Will this work or does one inch make a big difference?

 

[Fsappo]

What does your owners manual say? My experience is downsizing 1" some of the time in some cases works fine. But if it goes against the manufacturers specs, why risk it. What is your tarm hooked up to now?

 

[oldspark]

That almost falls into "it should work just fine" but for one reason or another it might not and if you have a problem that will be the first thing blamed.

 

[webbie]

In general I would suggest trying to calc your total chimney w els, etc and using the available charts to determine capacity. if the capacity is about 50 percent higher than the output of your boiler you should be ok
http://www.engineeringtoolbox.com/chimney-sizing-d_175.html

 

[patch53]

I would think it would work fine, but you may have to go a little higher with the chimney to get sufficient draft

 

[jimdeq]

Thanks everyone, I have enough pipe to get a foot over the peak of the roof. Does anyone have a idea how I can adapt from the 8 inch on the tarm to the 7 inch on the class A? Does anyone make such a fitting?

 

[webbie]

Sure, you can get un crimped 8 to 7 adapters and then crimp the end that you want.
Some even have it already crimped - scroll down on this page
http://www.gascoals.net/accessories/blackstovepipe/tabid/413/default.aspx

 

[RobC]

The Tarm should have a coupling that came with it so you would want to go off that correct ? I looked on the site I linked below but didn't see 7-8 they had 6-8. The Heat Fab 22guage is very nice and seems are factory welded. I did see that have crimping available. They may have a piece that goes from 7-8 not listed. They do have fittings that go from single wall to insulated.
http://hartshearth.com/chimney/stovepipe.htm

 

[RobC]

Here are some 7 - 8 adapters in 22 ga welded.
http://www.ventingpipe.com/index.cfm?page=search:browse&categoryID=4472