Question re: Pressure & Lines for Keg Serving for Soda??

duganderson said:

I had a question.....

From my understanding, folks serve beer from a keg at 10 PSI with short lines (4 ft).

Why do folks use more pressure (20-30 PSI) for serving soda? I know that soda is carbonated at higher pressure, but why does this impact serving pressure?

Can you serve Soda at 10-15 PSI like beer? If so, what length lines do you need?

Thanks

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EFaden said:

You could serve at lower pressure, but your soda would eventually reach a new equilibrium pressure(your serving pressure). You pretty much need to serve at carb pressure unless you drink it fairly quickly.

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duganderson said:

How long would it take approximately for the pressure to lower a lot in the keg? Would it be more like an hour or a day or more?

Since this occurs, if you're just pouring one or two servings a day, do you just leave the pressure set to 30 PSI and just use really long line? How long is necessary.

What if your bringing it to a party and your going to drink it over the course of several hours?

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billtzk said:

I'm using 30 feet of 3/16 line at 30 psi and 39 degrees for soda and it's working fine for me. The only issue I have is that if I don't draw at least one soda a day, the soda that's in the line, about 5.5 ounces or 163 ml, goes flat. It's not entirely flat, but close to it. I have no idea why that happens, but it does. That's a lot of flat soda on the first pour after a hiatus.

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EFaden said:

I run about 5 feet of braid reinforced 1/8 inch at 35 psi and it comes out great. Similar setup on my carbonator, just a longer line (about 10 feet). You have to dial it in. The 1/8 adds a lot of resistance so if you have to much it will gas out in the line.

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billtzk said:

That is great info. I'd love to swap out my 30 foot lines with five foot ones. Where did you find that? I can't seem to find any braided beverage line with a 1/8th inch ID.

Did you have to get a special tailpiece for your shank, or did you use an adapter of some kind? I have 1/4 inch diameter tailpieces on my shanks.

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billtzk said:

That is great info. I'd love to swap out my 30 foot lines with five foot ones. Where did you find that? I can't seem to find any braided beverage line with a 1/8th inch ID.

Did you have to get a special tailpiece for your shank, or did you use an adapter of some kind? I have 1/4 inch diameter tailpieces on my shanks.

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billtzk said:

Yeah, I read that thread. The downside for me is the low flow rate and overall bother.

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