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Old 06-30-2012, 07:20 AM   #1
kasky99
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Default Japan standard tank to US standard regulator?

I am stationed in Japan and I have a US regulator. I am only able to rent Co2 tanks with the Japanese thread standard. JIS B 8246 I believe. I have tried using google to find an adapter that would make that tank fit to my pressure regulator, but I have not been able to find a single one that goes from Japan standard to US standard. Has anyone else had this problem? Does anyone know where I could order the fitting?


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Old 06-30-2012, 07:36 AM   #2
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Look at taking your regulator to the place where you rent the bottle (or another gas fitting/supply shop). Have them check if you can unscrew the regulator's stem and replace the nut that screws onto the tank valve with the JIS nut. Sometimes this is possible if the mating surface is the same for both valve outlet types. Keep your original nut for when you get back to that states.


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Old 06-30-2012, 09:00 AM   #3
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Originally Posted by mattd2
Look at taking your regulator to the place where you rent the bottle (or another gas fitting/supply shop). Have them check if you can unscrew the regulator's stem and replace the nut that screws onto the tank valve with the JIS nut. Sometimes this is possible if the mating surface is the same for both valve outlet types. Keep your original nut for when you get back to that states.
Any idea where to buy that part?
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Old 06-30-2012, 09:38 AM   #4
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Any idea where to buy that part?
A place that sells regulators and parts should stock them. I know in NZ one of the bottle rental places also have a range of equipment in their shops.
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Old 02-07-2013, 01:13 AM   #5
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Default Found a fairly simple solution to the U.S. to Japan CO2 Tank Regulator issue

I know this is an older thread, but I want to provide an update for those who face the same issue as me of setting up a home kegerator system.

So, as this thread stated, there is difficulty getting a U.S. regulator on a Japanese CO2 tank. The reason being that U.S. regulator valve bolts are CGA-320 standard (approx. 22mm) while the Japanese regulator valve bolts are JIS B 8246 standard (approx. 1/2 inch). That being said, once I received my own regulator from the U.S., I had to figure out how to attach it to the CO2 tank I rented.

Bottom Line Up Front: The bolt from a 15.8 x 1/2 M154RK coupler does the trick. If you are in the Zama/Atsugi area, take a trip to Handy Home Center (http://www.handy-hc.com/) and pick one up there. It is on Highway 42 on the left hand side while driving toward Fujisawa. Nearest station may be Yamato Station (Kanagawa), but you'll need a cab from there. The address is: 1777 Fukaya, Ayase, Kanagawa Prefecture 252-1103, Japan

Since I am stationed at Zama, I drive by it every day when I go home. I saw it and decided to try my luck and go in. While browsing, I found of couplers next to their alcohol section (nicely placed). Doing some trial and error, and convincing a worker to escort me to my car so I could test a bolt on my CO2 tank. It fit perfectly, and 1400 Yen later I had the piece I needed. Steep price, but meh, my kegerator is complete so I can't be mad.

I am not sure what other stores would have this, but if you are not around Zama/Atsugi (or can't make the trip), print out the attached picture, go to home stores and browse around until someone says they have it.

Alternative options I have come across but did not pursue at this time:
1) Welding shops. Hard to find, especially if you don't speak Japanese.
2) Most Japanese bars get their regulators from the major brewers, so they are not a good resource for tips unless one says they can hook you up with a Sapporo/Kirin regulator. If you live on a military base, go to your local base bar/club and talk to the bartenders (or the MWR bar manager). They can likely give you some advise on finding what you need since they are typically Japanese locals and know the difficulties working with American products and Japanese market.

Best of luck to the other Geijun kegsters out there. Cheers!
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Old 02-07-2013, 01:17 AM   #6
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Also, reply or PM me with additional questions you may have.
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Old 02-08-2013, 08:39 AM   #7
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Also, reply or PM me with additional questions you may have.
I already replied to your PM before I read this so sorry about that. This may be the most helpful thing I have ever read. Thank you so much.
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Old 02-10-2013, 07:12 AM   #8
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No problem. I hope you find what you need and hope we can taste eachothers' beers sometime. Let me know if you need help getting to the home store.
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Old 02-28-2013, 01:42 PM   #9
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No problem. I hope you find what you need and hope we can taste eachothers' beers sometime. Let me know if you need help getting to the home store.
Well, I am making the run tomorrow after work. I will have to let you know how it goes. My only concern is that I do not speak Japanese, so I wonder how well this will work out. Other than changing out the nut, there were not issues with operation/connection were there?
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Old 03-01-2013, 12:50 PM   #10
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Just just for the size I mentioned, you should be fine (keep the receipt just in case). As for the operation and connection, it is still working just fine. Let me know if you have any issues after tomorrow!


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