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I have long used a homemade gadget to remove liquid water and mist. It won’t remove water vapor but I have found that vapor doesn’t cause trouble when you are blasting.
I put it about 6 feet away from the soda blast gun, and it has a dedicated (dry inside) hose that is not used for anything else.
It is made from a two foot long piece of 3" diameter Schedule 40 PVC pipe. One end has a cap bonded to it, and the cap is tapped 1/4" NPT. This is the outlet. There are four stainless steel hose clamps around the outside, roughly evenly spaced.
The other end has a cleanout bonded to it.
There is a piece of hardware cloth wedged in the pipe, down at the outlet end.
I stuff the pipe loosely with wadded up paper towels, then screw in the cleanout cap. The air inlet is near the cleanout end, drilled and tapped into the side of the pipe.
Depending on how humid the day is, you might have to change the paper towels once or twice after hours of blasting, but I have never had all of the paper towel material get wet through.