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Home Brew Forums > Home Brewing Beer > Equipment/Sanitation > Coupling vs. nipple welded in a keggle
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Old 10-05-2010, 01:13 AM   #1
Alemaker
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Default Coupling vs. nipple welded in a keggle

What are the pros and cons of welding in couplings or welding in nipples in a keggle?

My boil keggle has a nipple welded in, but I'm replacing my coolers and adding a keggle MLT and HLT to my setup (building a Brutus 10 like system). I've already cut the tops, they just need some plumbing.

I'm taking the time to get it right, and wanted some input on which works better for the most applications.


Thanks!


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Old 10-05-2010, 02:24 AM   #2
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a coupler allows you to thread into both sides, if you welded a nipple in you couldn't easy install a dip tube


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Old 10-05-2010, 03:12 AM   #3
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I think you see more couplings welded in than nipples.

IMO, a coupling gives the weldor a bit more margin for welding without damaging the threads. When welding a nipple, ant spatter can damage the threads.

Probably other reasons as well, just not thinking of them right now.

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Old 10-05-2010, 03:36 AM   #4
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Originally Posted by Alemaker View Post
What are the pros and cons of welding in couplings or welding in nipples in a keggle?

My boil keggle has a nipple welded in, but I'm replacing my coolers and adding a keggle MLT and HLT to my setup (building a Brutus 10 like system). I've already cut the tops, they just need some plumbing.

I'm taking the time to get it right, and wanted some input on which works better for the most applications.


Thanks!
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Old 10-05-2010, 11:38 AM   #5
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With external threads, a nipple can get damaged if the keggle is banged around, this won't happen with the internal threading of a coupling.
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Old 10-05-2010, 12:22 PM   #6
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LOL, yes.
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Old 10-05-2010, 12:25 PM   #7
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OK. Thanks. I think I'll go coupling. It should allow a thinner profile since you don't have to worry about welding splatter getting on the threads.
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Old 10-05-2010, 02:08 PM   #8
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OK. Thanks. I think I'll go coupling. It should allow a thinner profile since you don't have to worry about welding splatter getting on the threads.
If you want a really thin profile for something like a sight gauge or RTD that you won't need to connect to the inside, you can also do a half coupling.
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Old 10-05-2010, 04:48 PM   #9
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It's logical to go with a nipple for the lowest profile on the drain, but thread a cap on to the side he's gonna weld from to keep from weld damage. Nothing stops you from putting a siphon tube on the inside, you just need to use a connection with female threads. If copper, you'd use a female connector instead of a male.
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Old 10-05-2010, 05:47 PM   #10
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Originally Posted by Bobby_M View Post
It's logical to go with a nipple for the lowest profile on the drain, but thread a cap on to the side he's gonna weld from to keep from weld damage. Nothing stops you from putting a siphon tube on the inside, you just need to use a connection with female threads. If copper, you'd use a female connector instead of a male.
I don't think I would thread a cap on it before welding. They tend to "stick" when the weld heats the metal and then it cools. I had to cut a 2" plug out of a coupling for this very reason.

Ed


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