bambuko- I have some concerns about using quick disconnect fittings like shown for O or A gas. My experience with these fittings on the many air lines (fed by a compressor) is that many will develop leaks with use. It's one thing to get a few PSI less in one's tire but it's all together a different possibility to allow a combustible gas and/or a strong oxidizer collect (remember that P will settle onto the floor) with an open flame nearby while one's focus isn't on the floor. Andy