Quote:
Originally Posted by sphelps
Sorry but you folks are incorrect. First off more pressure doesn't mean more flow, yes the smaller the pipe the more pressure, head pressure so less flow. Actual head pressure is only a function of density, height and gravity not cross sectional area. You also however have losses from pipe design which includes pipe friction from pipe diameter, finish, flow regime, and the number and types of fittings used. Bottom line is the bigger the pipe the better as fiction reduces with larger pipe sizes, however you will max out the benefit depending on flow rate.
|
I didn't say more pressure increases flow! Where do you see that? A person will get
less gph, but
more psi at the end of a 1" pipe than using the same pump on a 3" pipe.
This is the same principle for powerheads which an impeller produces less gph, but more pressure, and a propeller produces more gph, but less pressure. How a MJ1200 with 198 gph will blow the flesh off certain corals placed 4" away where a Koralia 1 with 800 gph won't.