jamesinc;37388 wroteMy grandad used to have a really neat one, mounted to an air hardline on the shed ceiling. It had a glass bell jar so you could always see how much water was in it, then you just put a cup under it and pull a pin to drain it.
So many of these I installed in industrial air lines in my years as Pipe Fitter , never bothered collecting parts for my own system! Bugger..
Go to a proper industrial supply shop if you want the good stuff.
