Guy Prevost
Well Known Member
Before we start, a few important notes.
1. You must clean all of these parts thoroughly with a water based, non flammable cleaner before attaching them to oxygen. The presence of any grease, lubricant, oil, etc can very easily start a fire. As soon as one of these easy to start items begin to burn, the metal (in the presence of pure oxygen) will start to burn too. This is not a fire you want in your cockpit!
2. If you do set yourself on fire using this info, it is not my fault. This is how I built mine. For all you know, I'm a complete moron.
OK. Disclaimers taken care of. I purchased a Roscoe Pediatric regulator and a couple of D sized Aluminum cylinders on Ebay. I looked long and hard for a medical regulator that had an NPT threaded output, but have not been able to find one. If someone does find one, please post the info!
The Roscoe has a hose barb output that attaches with a metric thread. I don't have a lathe, so I had to kludge my setup together. I removed the hose barb from the regulator and figured out what size metric thread it had.
I then bought a tap of the same size and a stainless steel metric bolt. I cut the end off of an NPT nipple and drilled and tapped the ID for the metric bolt.
I then cut the head off of the bolt and drilled a hole through the center. After a thorough cleaning, the bolt was threaded into the nipple with Teflon tape in order to make an adapter.
I used the rubber gasket that came with the barb fitting and attached the nipple to the regulator.
The last step was to add a T and a pair of oxygen safe dry break connectors from Mountain High.
I tested for leaks in a sink full of water.
I make it a point to always turn the bottle off for takeoff and landing. If the regulator and bottle are turned on, I like to always have at least one cannula attached as I don't want to risk a leak at the fittings. If a leak happens around a gasket it can create heat and that can lead to fire. Even though I don't have any leaks, the regulator was not designed to have a valve after it, so I keep a cannula attached if the gas is flowing.
1. You must clean all of these parts thoroughly with a water based, non flammable cleaner before attaching them to oxygen. The presence of any grease, lubricant, oil, etc can very easily start a fire. As soon as one of these easy to start items begin to burn, the metal (in the presence of pure oxygen) will start to burn too. This is not a fire you want in your cockpit!
2. If you do set yourself on fire using this info, it is not my fault. This is how I built mine. For all you know, I'm a complete moron.
OK. Disclaimers taken care of. I purchased a Roscoe Pediatric regulator and a couple of D sized Aluminum cylinders on Ebay. I looked long and hard for a medical regulator that had an NPT threaded output, but have not been able to find one. If someone does find one, please post the info!
![IMG0237-L.jpg](/community/proxy.php?image=http%3A%2F%2Fspeed3guy.smugmug.com%2FAirplanes%2FAviation-posts%2Fi-bqGznKP%2F0%2FL%2FIMG0237-L.jpg&hash=6c7d46c93287376a627e5460e73214fb)
The Roscoe has a hose barb output that attaches with a metric thread. I don't have a lathe, so I had to kludge my setup together. I removed the hose barb from the regulator and figured out what size metric thread it had.
![IMG0241-L.jpg](/community/proxy.php?image=http%3A%2F%2Fspeed3guy.smugmug.com%2FAirplanes%2FAviation-posts%2Fi-g4GVCBb%2F0%2FL%2FIMG0241-L.jpg&hash=4fca67edcabeaa4a243275216f47a07b)
I then bought a tap of the same size and a stainless steel metric bolt. I cut the end off of an NPT nipple and drilled and tapped the ID for the metric bolt.
![IMG0243-L.jpg](/community/proxy.php?image=http%3A%2F%2Fspeed3guy.smugmug.com%2FAirplanes%2FAviation-posts%2Fi-R33nxcs%2F0%2FL%2FIMG0243-L.jpg&hash=a890d932d031821b39a3998839aaaae4)
![IMG0244-L.jpg](/community/proxy.php?image=http%3A%2F%2Fspeed3guy.smugmug.com%2FAirplanes%2FAviation-posts%2Fi-jFv4t6S%2F0%2FL%2FIMG0244-L.jpg&hash=e358589da6b0c999a034365f0a0f3374)
I then cut the head off of the bolt and drilled a hole through the center. After a thorough cleaning, the bolt was threaded into the nipple with Teflon tape in order to make an adapter.
![IMG0246-L.jpg](/community/proxy.php?image=http%3A%2F%2Fspeed3guy.smugmug.com%2FAirplanes%2FAviation-posts%2Fi-mrT5QKw%2F0%2FL%2FIMG0246-L.jpg&hash=078dafe51a317f18e2122023371ea530)
![IMG0245-L.jpg](/community/proxy.php?image=http%3A%2F%2Fspeed3guy.smugmug.com%2FAirplanes%2FAviation-posts%2Fi-r6mTQ49%2F0%2FL%2FIMG0245-L.jpg&hash=9bcf6dea7c1f01d08bf4f9927f63af03)
![IMG0250-L.jpg](/community/proxy.php?image=http%3A%2F%2Fspeed3guy.smugmug.com%2FAirplanes%2FAviation-posts%2Fi-d3rbJ4S%2F0%2FL%2FIMG0250-L.jpg&hash=26462959812521a94d53f0ace4b5bf0f)
I used the rubber gasket that came with the barb fitting and attached the nipple to the regulator.
![IMG0251-L.jpg](/community/proxy.php?image=http%3A%2F%2Fspeed3guy.smugmug.com%2FAirplanes%2FAviation-posts%2Fi-sVgMcjH%2F0%2FL%2FIMG0251-L.jpg&hash=b87914018677d2282cb20ff23786df5e)
The last step was to add a T and a pair of oxygen safe dry break connectors from Mountain High.
![IMG0253-L.jpg](/community/proxy.php?image=http%3A%2F%2Fspeed3guy.smugmug.com%2FAirplanes%2FAviation-posts%2Fi-mpn78c8%2F0%2FL%2FIMG0253-L.jpg&hash=c003d6973bafc09f118274882778c94d)
![IMG0255-XL.jpg](/community/proxy.php?image=http%3A%2F%2Fspeed3guy.smugmug.com%2FAirplanes%2FAviation-posts%2Fi-M5BT7fW%2F0%2FXL%2FIMG0255-XL.jpg&hash=3950ffdd43a9c9a08dc28ad86a758ea1)
I tested for leaks in a sink full of water.
I make it a point to always turn the bottle off for takeoff and landing. If the regulator and bottle are turned on, I like to always have at least one cannula attached as I don't want to risk a leak at the fittings. If a leak happens around a gasket it can create heat and that can lead to fire. Even though I don't have any leaks, the regulator was not designed to have a valve after it, so I keep a cannula attached if the gas is flowing.
Last edited: