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View Full Version : Four Nipples vs One Big Hole


darthtrader
04-09-2008, 12:09 PM
Hello Brethren!

I'm planning to build my UDS this weekend (finally) and would like some UDS veteran builder advice. In your opinion, which has better and more even air flow: four holes with nipples or one big three or so inch hole with a vertical intake pipe?

Stan41
04-09-2008, 01:28 PM
I'm certainly no expert, but when I built mine I used 4 holes with nipples. I think there is more control of the air flow this way.
Stan

bruskee
04-09-2008, 01:32 PM
Best thread title in history.!

Dr_KY
04-09-2008, 01:45 PM
I read the title and thought this was going to be a Woodpile thread.

The jury is still out on what works 'best' for a UDS so IMHO I would say start simple and go from there. I started with two 3/4 intakes and one 2'' exhaust and I burn just fine and have plenty of control.

Remember the wonderful thing about a UDS is it's simplicity.

darthtrader
04-09-2008, 01:47 PM
I read the title and thought this was going to be a Woodpile thread.

LOL! Maybe I should put UDS in the title then.

Dr_KY
04-09-2008, 01:51 PM
Not a bad idea ( I would have and did go with the hole though) :)

darthtrader
04-09-2008, 01:57 PM
Not a bad idea ( I would have and did go with the hole though) :)

How's temperature control going for you, Dr? Any hot spot problems?

Dr_KY
04-09-2008, 02:05 PM
Nah.. my meats usually so big all I have to do is rotate it but that's just an old habbit. Others may have differant items on at the same time but i'm not there yet.

The temps are very stable running one 3/4 open and one 3/4 ball valve about half way. I can see trying to keep temps under controll using omre that two inlets being a problem simply due to the burning of the fuel but I haven't ever run anything on the sort.

drbbq
04-09-2008, 10:50 PM
I thought this was a poll.

Divemaster
04-09-2008, 10:54 PM
I read the title and thought this was going to be a Woodpile thread.
This is not what I expected when I read the title!!!!

Don't own one but you sure suckered me in!!

Barbarian
04-09-2008, 10:55 PM
Best thread title in history.!

Almost fell out of my chair onto the floor at that response.

Now 10 minutes later I have to say that I used the 4 intake 1" nipple route. I think it could be hard to control with only one intake but maybe someone needs to give it a go and let us know how it works.

Kevin Garceau
04-09-2008, 11:14 PM
I see alot of ball valves..... do some put ball valves on all 3 or 4 holes? Does that get a bit complicated? Or open a few holes and put valves in half? One?

Puppyboy
04-09-2008, 11:20 PM
Best thread title in history.!Not woodpile, not woodpile, not woodpile, & kinda dissapointed. :lol:

OSD
04-10-2008, 07:02 AM
I only have one intake, it's 2" and one exhaust, 3". I read the UDS thread a couple times and other threads on here and decided to just try the one intake. I kept reading about people putting in 3-4 intakes for better air control and burns because the air could get in from different directions. But then in the next statement alot of them are saying that when they are up to temp and cruising along that they only have one valve open or 2 valves partly open. so I just did the one intake and it's doing fine. JMHO:grin:

Dr_KY
04-10-2008, 10:03 AM
I only have one intake, it's 2" and one exhaust, 3". I read the UDS thread a couple times and other threads on here and decided to just try the one intake. I kept reading about people putting in 3-4 intakes for better air control and burns because the air could get in from different directions. But then in the next statement alot of them are saying that when they are up to temp and cruising along that they only have one valve open or 2 valves partly open. so I just did the one intake and it's doing fine. JMHO:grin:
BINGO!!

Mark
04-10-2008, 10:17 AM
If you ever want to run hot (liked for grilled pizza) I doubt that any of these air intake approaches will suffice. Well, maybe if you use 4, 2-inch openings. But you'd probably spend $100in ball valves. That's why I did this.

sparky66
08-20-2012, 05:46 PM
If you ever want to run hot (liked for grilled pizza) I doubt that any of these air intake approaches will suffice. Well, maybe if you use 4, 2-inch openings. But you'd probably spend $100in ball valves. That's why I did this.

What did you do?

Sparky

mn_big_dog
08-20-2012, 05:53 PM
I just want to say thanks for bringing this one back from the dead. THE BEST post title EVER. Wasn't a member back in 2008 so I'm glad I got to see this :)

Tulse
08-20-2012, 05:58 PM
I have one 5/8" and one 3/4" hole in a slider configuration (the holes are 1.5" apart).

Those holes remain wide open at first. For the rest of the cook, both holes are closed down to b/w 1/4 - 3/4 of their full size. I am still amazed at how little open hole area you need to run a UDS.

My original plan was to put another 3/4" hole on the opposite side. I might still need to do that to if I want to get well above 300°, but there's no need yet as it runs anywhere I choose between 225° and 280°.

Smoothsmoke
08-20-2012, 06:10 PM
:shocked:

Jethro608
08-20-2012, 06:28 PM
Why don't everybody use gate valves insted they are less than 1/2 the price of a ball valve and do the same thing. 1 turn equals 1/4. 2 turns equal 1/2 & so on. The 3/4in valve cost about 8$

Bluesman
08-20-2012, 06:56 PM
I really think it's a matter of preference. 4 nipples are really good for flow, however one BIG hole puts it all in one spot and is easier to control just my $.02. But then again I'm an A## Man. :mmph:

1MoreFord
08-20-2012, 08:02 PM
Why don't everybody use gate valves insted they are less than 1/2 the price of a ball valve and do the same thing. 1 turn equals 1/4. 2 turns equal 1/2 & so on. The 3/4in valve cost about 8$

I've never understood this either:doh:

4uweque
08-20-2012, 08:24 PM
Why don't everybody use gate valves insted they are less than 1/2 the price of a ball valve and do the same thing. 1 turn equals 1/4. 2 turns equal 1/2 & so on. The 3/4in valve cost about 8$

I can't speak for others but I use a ball valve because I can be 20 feet away and see how it's set. It just works for me.

Jethro608
08-20-2012, 08:50 PM
I can't speak for others but I use a ball valve because I can be 20 feet away and see how it's set. It just works for me.

Yea after a couple brews I do kinda forget where I set it. So there is that. I think I should shop after a cpl. :eek:

ccarter
08-20-2012, 09:25 PM
Best thread title in history.!


+1

I cannot contribute any more than that statement.

Mark
08-21-2012, 08:30 AM
What did you do?

Sparky

see this photoalbum: http://www.bbq-brethren.com/forum/album.php?albumid=64

Luv-2-Q
08-21-2012, 08:35 AM
Sorry. I have no input. I clicked on this for an entirely different reason:oops:.

DJnKY
08-21-2012, 11:17 AM
Why don't everybody use gate valves insted they are less than 1/2 the price of a ball valve and do the same thing. 1 turn equals 1/4. 2 turns equal 1/2 & so on. The 3/4in valve cost about 8$

Use magnets stolen from her fridge....free!

swinn
08-21-2012, 12:36 PM
Best thread title in history.!

My thoughts exactly!

J-Rod
08-21-2012, 12:38 PM
This get's my vote for "Best Dirty Thread Title of the Year Award". Classic!

Back to question- I built my UDS with one big(1-1/2")pipe for the intake with ball valve. Works great and there's no bending over to adjust the air.

sparky'
08-21-2012, 12:48 PM
the sliders work great for controlling the heat.

http://i1269.photobucket.com/albums/jj593/mak1star/8-12-12%20drum%20chicken%20chuckie%20burgers/chickendinner017.jpg

http://i1269.photobucket.com/albums/jj593/mak1star/8-12-12%20drum%20chicken%20chuckie%20burgers/chickendinner013.jpg

works like a charm.

Bigmista
08-21-2012, 01:01 PM
I read the title and thought this was going to be a Woodpile thread.


First thought in my head too!

MattCom
08-21-2012, 01:52 PM
I roll with just one. I can manage temps from 240 for smokin' right through a blazing 500+ for pizzas. I keep the fire basket centered and have not noticed any odd burn patterns. There's a lot of room down there for air to flow evenly.
http://i208.photobucket.com/albums/bb301/Matto22/bded837c.jpg

jordan85
08-21-2012, 05:25 PM
I was planning on using 3 nipples for my first UDS build (following Norcoredneck's tutoria), now you guys have me wondering if I should use 4... :confused: