Question about 45° adjustable dvl elbows

[Rebelduckman]

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?

 

[kuma.jason]

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"?

 

[DougA]

(broken link removed to http://www.icc-rsf.com/c/iccrsf/file_db/pdfs.pdf_en/UB_Offset_Tables.pdf)

Scroll down for 30 deg tables.

 

[Rebelduckman]

Does anybody know how much you can adjust these elbows? If I could get to 30 degrees or so it would be great

 

[Rebelduckman]

(broken link removed to http://www.icc-rsf.com/c/iccrsf/file_db/pdfs.pdf_en/UB_Offset_Tables.pdf)

Scroll down for 30 deg tables.

Thanks so much for that link

 

[bholler]

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]

Duravent DVL 45's can be adjusted fully between 45 and 0 degrees. See pic below.

 

[Oldman47]

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"?

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]

See here, scroll to the bottom...

(broken link removed to 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

 

[Rebelduckman]

Duravent DVL 45's can be adjusted fully between 45 and 0 degrees. See pic below.

View attachment 160414

Thanks that's what I wanted to hear. I only need 2 inches or so

 

[kuma.jason]

You're welcome!

 

[Rebelduckman]

See here, scroll to the bottom...

(broken link removed to 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

I'm wondering does it matter if you put them at the top of the stovepipe or above the adapter?

 

[DougA]

The rule is to run your pipe straight up from the stove as far as you can, then use elbows near the top. That allows for better draft.

 

[kuma.jason]

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.

 

[Oldman47]

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.

 

[begreen]

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.

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]

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'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.

 

[begreen]

 

[kuma.jason]

That looks very nice. Clearly it can look good either way.

 

[Rebelduckman]

View attachment 160455

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.

 

[begreen]

Looks good. I'll probably go that route but I'm sure the wife will want to look at Both ways.

LOL, mine did too.

 

[Gasass]

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?

I think you can get the offset you're looking for with an adjustable 90.

 

[Rebelduckman]

I think you can get the offset you're looking for with an adjustable 90.

Maybe so if it adjusts both directions but I don't think it does. Somebody correct me if I'm wrong.

 

[kuma.jason]

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.

 

[Rebelduckman]

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.

Oh well, it's done now. The 45's Should be here in a couple days