Pump flow rate to RPMs ratio

[vanmeters]

Hi,

I should preface this with I don’t know very much, but I’m trying to understand why my flow rate is so much lower at same RPMs as other people I see post. For example at 1800 rpm’s, I get 23 gpm. At 2500 rpms, I get 44 gpm. But I see ppl post that they run their pump at 1500 rpms, which is only 15 gpm, and I’m not even sure my skimmers are working at that rate.

Is it the total amount of piping the water has to pass through that affects this? I have a heater and chiller, and I saw in a post someone saying that would decrease your gpm, is that true even when they’re off? My equipment is pretty far from the pool as it had to go in the AC alcove for the chiller, so if length of pipes is the reason, that would factor as well.
Just trying to understand running my pump. I’m all over the place (although I do now know I don’t have to turn over the water in a set amount of time).

Thanks for your knowledge!
Toni

 

[ajw22]

What model pump, heater, and chiller do you have? The specific model numbers please.

Do you have any automation?

Do you have heater bypasses?

Post pictures of your equipment pad.

 

[vanmeters]

The 2 pumps are Pentair Intelliflo VSF 011056, also have a Pentair Boost-rite LA-MS05
Heater is Pentair Mastertemp 400
Chiller is Tropicool (sorry, don’t know the model number)

My automation is Pentair Intellitouch i7+3 with Screenlogic

I have no idea if I have heater bypasses

Here’s a pic of my pad - thanks for your help!

 

[Jimrahbe]

van,

GPM is controlled by how hard it is to push water through your system and back to the pool. The more junk in the way, the harder it is, and the faster you will have to run your pump.. It is water flow, so it does not matter if something is on or off.

It appears you have a heater, a tab feeder, a UV system, solar and a chiller.. and your filter..

I have a filter... That is why I can run at 1200 RPM and you can't ..

Thanks,

Jim R.

 

[ajw22]

You got a lot of stuff to push the water through which takes a more pump speed.

Some if us with heaters use manual or automatic bypasses to remove the heater restriction when not in use.

My automatic bypass lets me get the same flow at 400 RPM less when the MasterTemp heater is bypassed.