ORIGINAL: TT2
I have two diaphragm pumps...one is weaker than the other. Should I use the strong one downstream of the weak one or vice-versa?
That's a good question. Umm... I think basically you want the strongest pump to be furthest downstream with the reason being that it will be the pump experiencing the greatest pressure differential. In other words, it will see full atmosphere on it's exhaust and near vacuum on its intake, whereas the first (upstream) pump will have near vacuum on its exhaust and a little lower pressure on the intake. I could be wrong though, so try it both ways and report back which results in the lower ultimate pressure in the bag.
Keep up the good work!
Good luck!!
-David