N/A Moisture mitigation: Filling gun from tank vs compressor

inner_romeo said:

I read somewhere that filling your gun from a tank reduces the amount of moisture that may enter your gun. This relates to some technical reason having to do with the fact that any moisture in a tank settles at the bottom, plus some other rationale I can't recall.

Any truth in it?

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There shouldn't be any moisture in your tank in the first place. If there is moisture in your tank that means you didnt have enough adequate filtering. I use 2 big gold filters in my compressor. The first one have cotton to remove some moisture but not all. Then the 2nd big gold filter have desiccant beads, and active charcoal to help remove any moisture that didn't get filter by the cotton. When I opened my tank after 3 years of filling it, it's dry. People who I heard having moisture in their tank is cause they use cheap compressor like the Yong heng with the standard small filter that came with it. That is not adequate at all.

I fully agree with ImpactX's comments!
But with that said, you are right using a tank minimizes the risk of getting water in your gun. since the water saturates inside the tank under pressure.
But you have to expect corrosion in a steel tank when the water is trapped in there.
So like ImpactX's telling, investing in a large double filter system from the compressor is a must.
Though I use a triple filter system - I always fill my 300 bar tanks and only fill my rifles from the tanks as an extra security.
I used this system in +5 years now and never had any moisture problem.
A proper filter system costs about the same as a Yong Heng compressor.

And be aware that the Cheaper Yong Heng compressors are sending a lot of smelly oil with the wet air too.
If you have the smelly oil in your dive bottle or gun the bad smell stays there forever.
I use Yong Heng myself - and am actually pleased with the performance.
I can top up my 3 scuba bottles from around 220 bar to 310 bar in about one hour. This includes refilling the adsorption in the filters, the setup of water cooling and packing everything away after filling my three bottles.
I change the water absorption material in filter 1, every time I top my three bottles up to 310 bar.
Every second time I change also the adsorption material in filter 2.
About every 5-7 times i fill my tanks I change the Activated carbon I use in filter no. 3.
and make sure the filters are disconnected from the filers during storage - so the humid filter doesn't generate corrosion back in the compressor.

engfred said:

....If you have the smelly oil in your dive bottle or gun the bad smell stays there forever.
I use Yong Heng myself - and am actually pleased with the performance....

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Nuvair 455 high pressure breathing compressor oil has no smell.