CGA347 will not bottom out and leaks air???

[Anthony Jarvis]

I got a new tank today a 88cf I was using a 44cf tank before. I kept the CGA347 fitting thinking that they would be interchangeable. When I screw the CGA347 onto the bigger tank it does not bottom out and leaves a thread showing and air leaks from the threads. (I can see the Vent hole just barely showing past the threads when screwed in completely) I purchased charging adapter from EBay, but it worked perfectly on the smaller tank without any leaks. I’m confused and would like any help. 

I checked for tightness and everything is snug. The CGA347 is tight as well just seems a little short for the bigger tank

 

[tscktran]

Anthony you may find your answer here:

https://www.airgunnation.com/topic/question-about-scba-valves/page/2/

 

[Centercut]

I've found that the hand tight ones from China with the orange plastic gasket at the tip sometimes don't fit right on certain tank valves, and are larger OD than the white tipped ones. The one with the white plastic gasket at the end seem to be a slightly smaller OD and taper, and have fit all my CGA347 tank valves.

https://ebay.us/h65tNo This one seems to work with all I've tried. Scott, Drager and Interspiro.

https://ebay.us/Auu1xP This one only seems to work with certain tank valves. Can't say which, but it didn't work on my Interspiro tank valve.

 

[Anthony Jarvis]

Anthony you may find your answer here:

https://www.airgunnation.com/topic/question-about-scba-valves/page/2/

Thanks a lot that really solved my problem! I need the nipple without the oring. I’ll definitely order a new nipple

 

[Anthony Jarvis]

I've found that the hand tight ones from China with the orange plastic gasket at the tip sometimes don't fit right on certain tank valves, and are larger OD than the white tipped ones. The one with the white plastic gasket at the end seem to be a slightly smaller OD and taper, and have fit all my CGA347 tank valves.

https://ebay.us/h65tNo This one seems to work with all I've tried. Scott, Drager and Interspiro.

https://ebay.us/Auu1xP This one only seems to work with certain tank valves. Can't say which, but it didn't work on my Interspiro tank valve.

Yes the bottom one with the orange oring is the exact one I have. Looks like a replacement is otw. 

 

[Centercut]

@anthonyramos - yes, the one above that will work with just about any CGA347 tank valve. I like the hand tight ones since carrying a wrench around can be a pain in the *&^

 

[Anthony Jarvis]

@anthonyramos - yes, the one above that will work with just about any CGA347 tank valve. I like the hand tight ones since carrying a wrench around can be a pain in the *&^

I agree with the hand tight adapters. I’m just going to replace the nipple with one without the oring and keep the other components. 

 

[Centercut]

Might not be able to tighten it enough by hand to seal it without leaks. The nipples without gaskets need additional torque to seal...

This is what you want if you already have the orange rig:

https://ebay.us/xe5x9W

 

[Anthony Jarvis]

Might not be able to tighten it enough by hand to seal it without leaks. The nipples without gaskets need additional torque to seal...

This is what you want if you already have the orange rig:

https://ebay.us/xe5x9W

Thanks

 

[Crosfire]

For future reference, I replaced the white o-ring style (used with the retaining screw style nipple) with The O-ring Store part:

TEF010 AS568-010 Teflon (PTFE) White22 Duro Shore D O-Rings 

Worked great. They are cheap so buy a few one size smaller and larger in case YMMV.

Also, you can get them at these sites at a higher price:

http://www.northshorecompressor.com/products/CGA-347-Ring-Tips-252d-for-retaining-screw-nipple.html

https://www.ebay.com/itm/New-10pcs-Washers-O-rings-Teflon-Gaskets-for-SCBA-Firefighting-SS-CGA-347-/174283843094

I think this is the one for the other style bottom o-ring (slides on without a retaining screw). Confirm before buying:

http://www.northshorecompressor.com/products/CGA-347-Ring-Tips.html