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Thanks for an actual useful reply Chris H. So apparently this ideally needs: a compressor that is preferably oil-free, but fully oil splash lubricated may be okay post-compression air chiller oil / water separator grade E primary filter stack modified grade E / hyperfilter secondary filter...

I am referring to the nitrox course for basic diving certification to use nitrox, not an advanced blending related course. I was under the impression that the compressor itself needs special oils and gaskets even though it is not itself ever going to be directly exposed to pure oxygen. So it...

Does anyone sell a low-cost compressor under US$3000 that is designed to be compatible with nitrox air tanks? Yes I have taken the PADI nitrox course. I am aware of the hazards of using a generic compressor and filling system with nitrox rated tanks. I do NOT want to blend oxygen and air at...

Making a silicone adapter for the exhaust port is no biggie, just make a lipped flange that fits around the exhaust port. For the inlet port, it is a bit more challenging because the normal air inlet is around the side of the valve, not the end/top.. Solution, one of either: 1. Modify the...

Okay so, if you have the Ocean Reef G.Diver or similar FFM equipped with the surface air breathing port, there is a way to attach filters to the inlet and exhaust ports. This can be done with either a single molded silicone rubber attachment, or with two separate ones. Generally, you remove the...

Also on a side note, it seems feasible to use SCUBA tanks and full face masks in a health setting directly the way they are designed to work underwater. For myself as a 5' 11" adult, I find that I use about 0.7 cfm when swimming relaxed. 60 minutes * 0.7 = 42 cu/ft. So a smallish and...

The method Ocean Reef is showing on their website is an incomplete solution because it does not have any sort of moisture trap over the exhaust port. So the health worker is protected from the patient, but if the health worker themselves has the virus, they will cough a fine mist of mucous...

Due to COVID-19 it seems I should probably wear my Ocean Reef Neptune full face mask in public without the tank. It would be a heck of a lot more comfortable than a surgical mask or other simple cloth mask. The one-way airflow will keep the inside of the mask cool and free of moisture. However...

Personally I believe the practice of "buddy breathing" from a single regulator should be taken out of SCUBA instruction classes, because you might as well be sticking your tongue straight into the mouth of your buddy breather. Of course buddy breathing is worth keeping in mind as an emergency...

If you or your diving buddy have herpes simplex, which involves "cold sores" on the lips, inside the mouth, or the back of the throat, is it possible for this infection to be spread via the regulator mouthpiece? This question also similarly applies to mononucleosis and the various other...

Does anyone make a compressor that is compatible with nitrox tanks but is small, can run from 115/230v or small engine power, and affordable for personal use? The goal here is NOT to do air blending at home, but merely to fill the nitrox tanks with regular atmospheric air when it is not...

I looked around for a local ENT that knows about balloon dilation. They told me that the procedure is risky because there is a major artery to the brain that passes through the vicinity of the Eustachian tube so doc said they don't like to do dilation that unless there is no other option. I...

I am fairly certain this does not exist. Someone please make it and I will buy it. I am looking for a way to brightly illuminate, but which does not put all the LEDs into a single tight bunch, but rather distributes them along a long narrow band about 2 meters wide. There's no need to blind...

I need a detached drysuit hood that has a smooth watertight sealing surface on the inside of the face opening to seal against my face, and also a second smooth watertight sealing surface on the outside of the face opening to seal against the mask skirt. The generic type of detached neoprene...

Yep, you have to use something personally to know how it works. Understanding something through scientific and physical principles is not how it is done. If you have no direct experience your opinion is invalid. Just ignore the following and move along.. Calculation of Pressure Loss in...

$600 is a bit much to blow on a piece of technology that isn't commonly used anymore and I will have to teach myself to use watching Youtube videos. Though if I go this route, then no one had better damn well complain if I buy a Hollis MOD 1 FFM off Amazon and teach myself to use that open...

Eh, I do not like the double-hose corrugated hoses. Although I have never used them I can tell just by looking at them that: - airflow is restricted by turbulence from the corrugations, which is why the diameter needs to be so huge - If you get water in it, every one of those corrugations...

Oh and the other option known as "the handlebars" are the most stable and least complex in any orientation, with a direct water-exposed but watertight exhaust valve pressure balancer at the mouthpiece so that air is forced to migrate out through either exhaust tube. Just be careful if these...

This is now venturing off into DIY, but it's unclear to me why exactly a 2nd stage regulator HAS to be in your mouth. Put it behind your head on a single snorkel tube, with a pushbutton purge cable to the back attached to the tube, and adjust the valve sensitivity to work in the new location...

What is the correct tool to remove the insert from a Faber blue steel 10120 convertible valve? The insert has a really strange tool hole where it is not perfectly flat sided like hex but also not deeply lobed like torx. 6mm hex fits pretty well, but also so does torx T40. Obviously I do not...