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-   -   Can you serve non carbonated water from a corny keg (http://www.homebrewtalk.com/f35/can-you-serve-non-carbonated-water-corny-keg-371714/)

ryan00101101 12-03-2012 07:39 PM

Can you serve non carbonated water from a corny keg
Is is possible to use c02 to dispense regular non carbonated water from a keg that is at room temperature? (I live on a farm and the water is not good for drinking.) I have a few corny kegs that are spares and was pondering the idea of hooking one up to the water dispenser that is on the fridge this would also get the ice maker working on it as well. The water in the keg would be room temp (69F to 70F in my house) then would be cooled in the fridge. Would this be possible and what psi would the co2 need to be at so as to be enough to push the water into the fridge without carbonating it.


Derick_Z 12-03-2012 08:24 PM

I could be wrong, but I think as long as you have CO2 pressure on the liquid, it WILL carbonate to that level. That could be a very low level if you have short lines/keg is higher up/etc, but it can't be avoided as far as I'm aware.

You could turn off the gas and vent the keg after every use, and turn it back on before dispensing again though, which should avoid the issue..

zachattack 12-03-2012 08:35 PM

If the water is at room temperature, and you keep the dispensing line short and only apply as much pressure as you need to get water flowing (2-3 psi), there will be almost no carbonation. Pressurizing with nitrogen, argon, or air would obviously eliminate the issue.

You could maybe use an aquarium pump, though I'm not sure how those would do if you dead end the outlet.

Something like this:

Is rated for 8 feet of water, which is 3.5 psi. That might be enough if you elevate the keg and use 1/4" ID or bigger line between the keg and fridge. I'm not sure what the pressure drop would be inside your icemaker/water dispenser, or if the fridge has a minimum pressure it needs.

ryan00101101 12-04-2012 03:46 PM

Air sounds like the way to go. I could probably get a simple bicycle pump that comes apart and sanitize it and use the keg lube on the o rings so it is food safe. Then pump it to 50 psi, that is what my water pressure is set at on my pressure tank. And save the co2 for the beer.

zachattack 12-04-2012 04:03 PM

But then you'd have to be pumping it up constantly.

It obviously wouldn't be 50 psi, but would gravity feeding provide enough pressure? What if you just got a big carboy full of water and put it on top of the fridge?

JRems 12-04-2012 04:39 PM

I would just get a nitrogen tank and use that instead of co2

DrunkleJon 12-04-2012 04:43 PM

Additionally you can put a cobra tap on the liquid out, and either place a gas in QD without a hose on it or have the pressure relief valve set to open and as long as the cobra tap is below the level of the keg/liquid it should form its own siphon and work fine sans CO2

Misplaced_Canuck 12-04-2012 06:13 PM

A small water pump with a pressure switch would do the trick...

Keg one has fresh water, vent opened. The pump pumps the water from keg 1 (from the out post) to the IN post of keg 2. Keg 2 is air tight (like a normal well water tank), so when the pump starts, it will create pressure inside keg 2 as it fills it. Drain from keg 2 normally, from the out post.

The only tricky part is getting a pressure switch in the mix.

This is essentially how a well water pressure tank works. As the pump fills the tank, pressure is created.


hopsalot 12-04-2012 07:06 PM


shelly_belly 12-04-2012 07:38 PM

For my brand of refrigerator minimum water pressure required for ice-making is 20 PSI for the non-filtered model and 35 PSI for the filtered.

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