Originally Posted by shtank
I'm using a March. How long are your lines?
The 2nd tier of my stand (where the HERMS is) is about 24" higher than the surface my HLT and Kettle are on. My March pump is then about 18" lower than that. So my line from MLT to pump is probably 36", then likely 36-48" from the pump up to the HERMS, then another 36" line back to the MLT. I have 25' of 3/8" copper in the HERMS and I don't have flow issues at all (I need to throttle the pump back a lot).