Single vs. Double Wall Pipe

[RKBAGUY]

Getting ready to set a pre-owned pellet stove insert into my existing masonry fireplace, and wondering if there might be a way to economize on the venting. Since the existing fireplace is already masonry, I'm wondering why I wouldn't be able to get away with single wall galvanized from a box store like HD or Lowes, or if I have to use double wall insulated.

I have a ~12' run from the bottom of the fireplace to the top of the chimney, but if we subtract the ~2' from the bottom surface of the hearth to the bottom of the flue, I'm working with about a 10' run. The local ACE hardware store (which has a Fireside showroom) quoted me about $250-ish for double wall insulated straight pipe (I think it's Selkirk) along with connectors, silicone and so on, but I was hoping that since it's going into an existing chimney that I could cut the cost of that in half (or more) by using 'cheapo' stuff that's "good enough".

Thanks in advance!

 

[john193]

Single wall in masonry chimney is just fine. This is what I did with my insert running about 15 ft.

 

[RKBAGUY]

Single wall in masonry chimney is just fine. This is what I did with my insert running about 15 ft.

Does it need to be stainless, or can I use (cheapo) galvanized?

 

[Bioburner]

Still is burning a wood product so needs to be stainless

 

[john193]

Get a SS liner and it will likely outlive your stove. In other words, buy it once.

 

[imacman]

Fireplace installs require SS liner, preferably all the way to the top with a proper plate and cap at the top. A block off plate near the damper is needed also.