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Old 09-05-2011, 03:19 PM   #1
Felix2Fingerz's Avatar
Aug 2011
Hamburg, NY
Posts: 33
Liked 5 Times on 4 Posts

I'm in the process of building my kegerator and getting parts. I just bought a couple of ball lock kegs from someone on craigslist and they had an old regulator laying around that I grabbed for 10 bucks. After a first glance, it looked like a standard dual gauge regulator with both gauges with psi ratings that you would find on a typical Co2 setup.

However, once I got it home I found that it was a nitrogen regulator made to screw into a tank with a female adapter found on nitrogen tanks where Co2 has a male connection. The regulator is an old tap-rite:
Series 740N
Compressed Gas
Regulator 336M
2640psi (@70DegF) Max inlet pressure

If I get the right adapter, could I use this for Co2?

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Old 09-05-2011, 10:13 PM   #2
Aug 2008
Posts: 1,419
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I would try selling it or trading it for a co2 regulator before trying to convert it.

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Old 09-05-2011, 10:18 PM   #3
Golddiggie's Avatar
Dec 2010
Posts: 11,995
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Keep it for when you brew something that you want to serve on beer gas/nitrogen. New those are $45-$60 (from Keg Connection)... So at $10 it's worth holding onto. At least until you decide (beyond any doubt) that you'll never use beer gas/nitrogen for a batch.
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Old 09-06-2011, 05:41 AM   #4
Mar 2011
Halifax, NovaScotia
Posts: 46
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I use a "nitrogen" regulator for my kegerator setup and never had any issues. I simply found a local air company and swapped the threads to match my CO2 tank.
Was it made for CO2? No, but to convert the regulator only cost me $0.50 and it works great. Gas is gas

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Old 09-06-2011, 06:15 AM   #5
Oct 2006
Moline, IL
Posts: 475
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Originally Posted by WPen View Post
Gas is gas

That's definitely not true.

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Old 09-07-2011, 03:03 PM   #6
Mar 2011
Halifax, NovaScotia
Posts: 46
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Yeah I probably shouldn't have stated that, definitely not true. But I do know for certain that a regulator designed for nitrogen can be modified to dispense CO2 safely. That's all I was trying to say.

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Old 09-08-2011, 03:54 AM   #7
beaksnbeer's Avatar
May 2011
New Port Richey, Florida
Posts: 2,845
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Trade it for what you need, It will go

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Old 11-28-2012, 03:22 AM   #8
Jun 2009
Jefferson, South Dakota
Posts: 43

I know this thread is old but I just picked up the same tap-rite 740N regulator and was wondering if you ever used yours for CO2

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Old 11-28-2012, 05:33 PM   #9
Mar 2012
, MA
Posts: 2,799
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You can use it for CO2, you just need to swap the CGA nipple/nut, as WPen mentioned.

If you want to keep the regulator intact you can also buy an adapter. Nitrogen tanks use CGA 580, CO2 uses CGA 320. Here's a sample adapter, you can probably get it cheaper someplace else:

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