Oxygen Transfill Transfiller Adaptor CGA540 to CGA870 Medical Dental Aviation

This "transfill" adapter seems to be built well, however it is not usable "out of the box". You will need to modify it. First off, it does not come with a washer for the CGA 870 end. You will need to supply your own. Secondly, one cannot get a tight enough fit for leak free gas transfer without snugging the CGA 870 brace up to the main (hex) manifold. Thus, you may have to hold the recipient tank at an unusual angle, (It was over my shoulder). Third, the CGA 870 tank valve must be screwed down TIGHTLY! Thus one needs a lever arm to apply the requisite torque... It may be helpful to apply molybdenum grease to the threads to avoid galling, AND have a hex nut instead of the T bar.Fourth, with the above modifications, one can pressurize a tank to about 1500 psi before the transfiller adapter audibley leaks again... Now the problems are at the pipe threads where: 1) the guage and 2) the CGA 540 fitting enters the manifold. Once these two sites are disassembled and reassembled with benefit of PTFE tape, I recon it should be a good unit!

Gauge was stripped. Someone jammed two plastic washers in the hole and screwed the gauge in and stripped it. Had to dig the two washers out and replace the gauge. Prongs that go in the head of the bottle had a hard time going in. It worked but I’m not happy. 😡