This is a fantastic video and explanation. I have no clue about these parameters before and now I believe I have a good understanding. Thank you very much
If your water demand from the system is less than 8 gpm (the recommended limit of schd 40 3/4" PVC) then you'll lose less than 2 psi from the pipe, plus whatever loss from the filter, then you'll gain pressure on the downhill run. If it's 25' straight down elevation loss, then you'll gain 10.8 psi.
Yes. I use the PDF of Friction Loss Charts from Hunter Industries, and it includes Poly. You can download it from hunter or there's a link on our website.
