Pump size for infinity edge pool need help

[Billpool]

I have a client wants a infinity edge waterfall upper pool area is 35' x 5' the the edge will be 35' long. We want to make sure we have enough pump to make this water roll over fast. I understand the need for larger pipes like 3"-4"
pipes. Everyone I ask about actual pump size (HP) gives me different answers. Can anyone give me a calculation to figure this out? The catch basin will be large 40' x 5' the drop is only 2' from top to catch basin.

 

[PoolguyinCT]

Since you are in Illinois, i recommend hiring nick at sunset pool for engineering / plan.
There are far too many pitfalls than pump sizing.

 

[Billpool]

I just want to know if there is a formula to calculate myself
Thanks

 

[PoolguyinCT]

The Francis Formula is a starting point, but the vessel is a huge factor.

 

[Billpool]

Thanks

 

[PoolguyinCT]

....

 

[PoolguyinCT]

Once the water crests, gravity does the work. Weir design & collection/make up water is where these projects go south fast.

Don’t get your head twisted around monster pumps..

I’ll PM you a well authored read.

 

[JamesW]

WaterFall Specialty Pump - Efficient Pool and Spa Pumps - Pentair

Maybe the AFP-180 water feature pump or an Intelliflo XF.

Over the Edge | Pools/Spas | Watershapes

IntelliFloXF Variable Speed Pump - Efficient Pool and Spa Pumps - Pentair

I would suggest the IntelliFloXF with 4" suction and 3" pressure.

Make sure that the trough is big enough and deep enough.

Make sure that the suction intakes have a lot of surface area for safety and to make sure that the water doesn't vortex air into the lines.

 

[PoolguyinCT]

JamesW- that is the article I sent OP, great read isn’t it?

Do you have any G3 affiliations?

One of contributors cited by the author is a business partner of mine in a consulting/defect venture. Small world