I got my alkin today..

You can add a desiccant filter at the input as well, just ensure there is no restriction.
Desiccant filters on intake side don’t really do anything. They require a dwell time. The best way to drop incoming humidity is running it through a chiller to make the air condensate and that’s not practical for small home compressors or even large commercial compressors. A compressor intake needs unrestricted air flow. If you do anything to try and dry incoming air be sure to install a differential pressure gauge so you can assure you aren’t starving the intake at all.
 
Desiccant filters on intake side don’t really do anything. They require a dwell time. The best way to drop incoming humidity is running it through a chiller to make the air condensate and that’s not practical for small home compressors or even large commercial compressors. A compressor intake needs unrestricted air flow. If you do anything to try and dry incoming air be sure to install a differential pressure gauge so you can assure you aren’t starving the intake at all.
I suppose because they are sold is not enough to justify effectiveness, ok. However, I would not say they don't really do anything, probably just not as much.
Other than that, yes, everything you said.

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Desiccant filters on intake side don’t really do anything. They require a dwell time.
That's my understanding as well. Starting the intake hose indoors seems the simplest way to start with less humid air.
Not going to sweat it too much- pretty robust water separation & filtration on these units.
 
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I suppose because they are sold is not enough to justify effectiveness, ok. However, I would not say they don't really do anything, probably just not as much.
Other than that, yes, everything you said.

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Yeah, that Air Venturi drier is a joke. If you don’t dwell the air, all it is is a restriction. And they know it, but marketing is a wonderful thing.