Compressor water trap

Based on youtube designs, for example

https://www.youtube.com/watch?v=KzBNscMrQMs

Works really well. First tested on a day with 20-30% humidity 30 degree Celsius. In an extended spray (5mins) a significant amount of water accumulated in the first stage (revealed by a white blast when I opened the stopcock), less in the latter stages, and none noticeable in the last stage. Conclusion is that 4 stages is not overkill. Testing for water in the hose attached to the gun found non noticeable. Spray unaffected by water. Success!

Note the compressor maintains the pressure in this system at about 80-100psi. I have a regulator right at my spraygun which is adjusted to about 20psi, suitable for the EkoPrime primer (diluted 10% with demineralised water)