Thanks for last image - very useful. I think it's obvious now that my flowmeters work the other way round. Numbers start on bottom, rising to 4L/m at top. Yes, I have have pushed them, I have also blown into the manifold with them fitted. Everything seems to suggest they should be on the return.
See pic below. It's fairly clear how they work.
Unless anyone thinks I'm headed for certain disaster I think I'm just going to carry on and connect up as planned.
See pic below. It's fairly clear how they work.
Unless anyone thinks I'm headed for certain disaster I think I'm just going to carry on and connect up as planned.