The problem you’re having with water is normal. Those water separators will only remove water, not vapor. I don't think you are going to have much luck by adding more separators. The air becomes hot when it is compressed so you will need to cool it in some way so the moisture will condense and then the separators will remove it. There are a lot of ways to do it, refrigerated air dryer being the best and most expensive. I like the idea of a bucket of water with tubing coiled in it, the water will provide good heat transfer. Another option may be a large cooler with tubing coiled inside, and filled with water and ice. However you go be sure to locate the separator as far from the air compressor as possible to give the air time to cool.
Good luck and I hope this helps shed some light on the problem.
John
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John
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