Pump Flow Rate Hi & Lo Speed ?

roadking00

LifeTime Supporter
May 2, 2012
314
North of Charlotte, NC
#1
I'm trying to find information on my pump, Flow rate on low speed compared to high speed and can not seem to find any info on the net ? Trying to figure out how many hours a day on low speed I need to run my pump to turn my pool volume over at least once per day ? I've read somewhere on here you should at least turn it over 1 time per day :?


 

linen

TFP Expert
LifeTime Supporter
Jul 30, 2010
8,649
Twin Cities, MN
#2
From pentair's website here is a link to the challenger's flow curves: http://www.pentairpool.com/images/p...allengerHighFlow/ChallengerHFlowCurve_new.jpg I think yours is curve C.

The only way to know what your head loss is acuratly is to know most of your plumbing details. But if we assume a fairly lossy 50 feet of head loss, then your flow rate on high is somewhere around 77 gpm. On low you flow will be approximatly half of that, or ~39 gpm (or maybe just a little higher due to less head loss in the plumbing), but your power consumption will be 1/4 of full speed.

So, approximately 21600/39gpm/60= 9.2 hours to turn over once on low speed.
 

roadking00

LifeTime Supporter
May 2, 2012
314
North of Charlotte, NC
#3
So, approximately 21600/39gpm/60= 9.2 hours to turn over once on low speed.
Thanks Linen, I was planning on running my pump at low speed at 2 separate 6hr times per day and dial in my peristaltic pump for that time span and injection rate to maintain my proper FC levels, so it looks like I should be good with that pump run time for turn over rate :-D