head loss calculator help

[balsaaaq]

when calculating head loss on this site, do you input the return lines, supply lines, or both? As far as verticle, horizontal, valves, etc. Is it just on side of the plumbing to the pump or both?...bals

 

[Henry Bowman]

use the output side (only) for the head loss calc. I'm pretty sure the calculator is assuming the pump is being fed in an unrestricted manner.