Tunze CO2 regulator problem

dieselkeeper · 05/11/2017, 11:26 AM

I'm replacing my old 7077/3 tunze CO2 regulator with a new. The new regulator will not screw on the CO2 tank. The old one screws right on and off. The replacement stops like it is trying to cross tread. I sent one back to the vendor thinking it was bad. The replacement is doing the same thing. Any solutions?

rvitko · 05/11/2017, 12:58 PM

Can you post a picture of the part that mates on the bottle? Does the box say 7077/3 A on the bar code label or just 7077/3. They make two threads, CGA for the US and the standard European thread used almost everywhere else.

dieselkeeper · 05/12/2017, 10:53 AM

rvitko · 05/12/2017, 11:38 AM

That definitely looks right, the European thread has a protrusion in the middle of the o ring that inserts into a recess in the bottle so it is very distinct. Is it possible the bottle has an o ring or hard plastic seal ring stuck on it all ready? Do you own the bottle or was it an exchange, maybe the wrong bottle?

rvitko · 05/12/2017, 11:40 AM

FWIW, Even the European thread will thread onto our CGA bottles, it is not that different, it fits looser, it seems to be just a small difference in thread pitch and the way it seals to the bottle.

dieselkeeper · 05/12/2017, 05:10 PM

I'm replacing a tunze regulator with this one. Only one thread catches and stops.

rvitko · 05/15/2017, 08:42 AM

The only way I could no for sure if something is wrong is to get it back and try it on my bottle. The fitting does look correct but the thread is not very different between CGA and the European standard.

05/11/2017, 11:26 AM	#1
dieselkeeper Registered Member Join Date: Aug 2006 Location: Down south Posts: 198	Tunze CO2 regulator problem I'm replacing my old 7077/3 tunze CO2 regulator with a new. The new regulator will not screw on the CO2 tank. The old one screws right on and off. The replacement stops like it is trying to cross tread. I sent one back to the vendor thinking it was bad. The replacement is doing the same thing. Any solutions? __________________ 210 gallon, 75 gal sump/refugium, 3 Tunze 6105 on 7096 controller, AT I Sunpower 8 bulb T5 lighting, Apex controller. 40 gal breeder/20 gal sump frag tank

05/11/2017, 12:58 PM	#2
rvitko RC Sponsor Join Date: Apr 2000 Location: Austin Texas USA Posts: 35,785	Can you post a picture of the part that mates on the bottle? Does the box say 7077/3 A on the bar code label or just 7077/3. They make two threads, CGA for the US and the standard European thread used almost everywhere else. __________________ Roger Vitko Tunze USA "He's for every one of us, stands for every one of us, he'll save every man, woman and child in a mighty Flash!" Current Tank Info: 210 gallon planted tank with Altum Angelfish

05/12/2017, 10:53 AM	#3
dieselkeeper Registered Member Join Date: Aug 2006 Location: Down south Posts: 198	__________________ 210 gallon, 75 gal sump/refugium, 3 Tunze 6105 on 7096 controller, AT I Sunpower 8 bulb T5 lighting, Apex controller. 40 gal breeder/20 gal sump frag tank

05/12/2017, 11:38 AM	#4
rvitko RC Sponsor Join Date: Apr 2000 Location: Austin Texas USA Posts: 35,785	That definitely looks right, the European thread has a protrusion in the middle of the o ring that inserts into a recess in the bottle so it is very distinct. Is it possible the bottle has an o ring or hard plastic seal ring stuck on it all ready? Do you own the bottle or was it an exchange, maybe the wrong bottle? __________________ Roger Vitko Tunze USA "He's for every one of us, stands for every one of us, he'll save every man, woman and child in a mighty Flash!" Current Tank Info: 210 gallon planted tank with Altum Angelfish

05/12/2017, 11:40 AM	#5
rvitko RC Sponsor Join Date: Apr 2000 Location: Austin Texas USA Posts: 35,785	FWIW, Even the European thread will thread onto our CGA bottles, it is not that different, it fits looser, it seems to be just a small difference in thread pitch and the way it seals to the bottle. __________________ Roger Vitko Tunze USA "He's for every one of us, stands for every one of us, he'll save every man, woman and child in a mighty Flash!" Current Tank Info: 210 gallon planted tank with Altum Angelfish

05/12/2017, 05:10 PM	#6
dieselkeeper Registered Member Join Date: Aug 2006 Location: Down south Posts: 198	I'm replacing a tunze regulator with this one. Only one thread catches and stops. __________________ 210 gallon, 75 gal sump/refugium, 3 Tunze 6105 on 7096 controller, AT I Sunpower 8 bulb T5 lighting, Apex controller. 40 gal breeder/20 gal sump frag tank

05/15/2017, 08:42 AM	#7
rvitko RC Sponsor Join Date: Apr 2000 Location: Austin Texas USA Posts: 35,785	The only way I could no for sure if something is wrong is to get it back and try it on my bottle. The fitting does look correct but the thread is not very different between CGA and the European standard. __________________ Roger Vitko Tunze USA "He's for every one of us, stands for every one of us, he'll save every man, woman and child in a mighty Flash!" Current Tank Info: 210 gallon planted tank with Altum Angelfish