I've ordered 2 of these to hook together so I can gain another inch or 2 from my stove to the corners. How much would say 30° get me?
Question about 45° adjustable dvl elbows
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kuma.jason
Member
Two of the fixed 45’s would give about 4.5" of offset if I remember correctly. If 45 degrees gives 4.5" and straight gives Zero offset, is it mathematically likely that 22.5 degrees would give in the neighborhood of 2"?
http://www.icc-rsf.com/c/iccrsf/file_db/pdfs.pdf_en/UB_Offset_Tables.pdf
Scroll down for 30 deg tables.
Scroll down for 30 deg tables.
Does anybody know how much you can adjust these elbows? If I could get to 30 degrees or so it would be great
Are you using icc pipe if not those tables wont help you. But who ever makes your pipe probably has offset charts of their own
kuma.jason
Member
Oldman47
Minister of Fire
The DVL 45s give about 4.5 inches each. When I put a pair back to back I got 9 inches. You can aim that 9 inches any direction you want to get the wall clearance you need. I just needed to miss a roof truss so I put mine close to parallel with the back wall.
kuma.jason
Member
See here, scroll to the bottom...
http://www.duravent.com/docs/product/dvl_durablack_L820_2012-sept_w.pdf
The offset for 2 DVL 45's (positioned at 45 degrees) is 5". The chart does not give offsets for other angles.
Oldman47, I'm not sure where you're measuring 9" of offset. Back in my install days, over a decade ago, I recall the back-to-back offset being approx. 4.5-5".
Anyhow, looks like the OP will be able to obtain any offset desired, up to 5" with the back-to-back set up.
Jason
http://www.duravent.com/docs/product/dvl_durablack_L820_2012-sept_w.pdf
The offset for 2 DVL 45's (positioned at 45 degrees) is 5". The chart does not give offsets for other angles.
Oldman47, I'm not sure where you're measuring 9" of offset. Back in my install days, over a decade ago, I recall the back-to-back offset being approx. 4.5-5".
Anyhow, looks like the OP will be able to obtain any offset desired, up to 5" with the back-to-back set up.
Jason
kuma.jason
Member
I'm wondering does it matter if you put them at the top of the stovepipe or above the adapter?
kuma.jason
Member
Put them at the top. They are above eye level that way and it looks better.
Personally, I don't think top or bottom will make a bit of difference in draft, especially for the modest angle that you are going to use.
Personally, I don't think top or bottom will make a bit of difference in draft, especially for the modest angle that you are going to use.
Oldman47
Minister of Fire
It does make a difference above or below the ceiling adapter. Above you are working with chimney pipe, not DVL. Chimney pipe, at least the brand I used, is only available up to 30º of offset angle.
We tried both ways and my wife and I decided we liked it at the stove better. With a straight up 20ft chimney draft has not been an issue.
kuma.jason
Member
We're not talking about above or below the ceiling support. The OP has established that he's making an offset in the DVL pipe. The question is whether to place the offset near the stove, or near the ceiling.
kuma.jason
Member
Looks good. I'll probably go that route but I'm sure the wife will want to look at Both ways. I went through last year worrying about it being a little close, not this year. I was fine with the 17-vl but not for the 13. I wish I wouldn't have built it so tight to begin with but oh well.
Gasass
Member
Maybe so if it adjusts both directions but I don't think it does. Somebody correct me if I'm wrong.
kuma.jason
Member
The 90 would have 3 swivel points instead of just the one. He's right, it's possible you could get the offset out of the one piece. Though I'm not sure it's worth returning your 45’s for.
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