I've found a rountoit, and am fitting my compressors to the workshop. I've an Ingersoll Rand type 30 compressor and a small Clarke twin piston compressor, both 3 HP, that will be fitted to a ring main. I want to spray with this set up, air feed mask, and do some blasting, so would like to remove all water from the system. I was going to go with a copper pipe set up, with an auto drain, as suggested in the guide here, but then I found out about drop out filters. Are they a good alternative to the copper pipe array idea? Cost and time wise there's very little in it. https://www.ebay.co.uk/itm/DROP-OUT...rain-UP-TO-32CFM-FILTER-DRYER-M-/274461550102 Something like this?