One 6' at 2' height. Two 36" at 4' height. Can a dedicated Intelliflow3 handle the flow or would I be better off with the Intelliflow XF?
12 feet of Sheer Descents
- Thread starter PSPOOL
- Start date
- Jul 21, 2013
- 65,974
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
PS,
You might want to buy several sets of ear protectors.. The kind you use when shooting shotguns...
Thanks,
Jim R.
You might want to buy several sets of ear protectors.. The kind you use when shooting shotguns...
Thanks,
Jim R.
A 3" suction can support about 138 gpm, which is 11.5 gpm per foot.
Is this plumbed or in the design phase?
If design, I would do a 4" suction, a 2.5" line to the 6 foot sheer and a 2" line to each of the 3 foot sheers with separate valves for each line.
How much projection do you want?
How important is it for the pump to be as quiet as possible?
Is this plumbed or in the design phase?
If design, I would do a 4" suction, a 2.5" line to the 6 foot sheer and a 2" line to each of the 3 foot sheers with separate valves for each line.
How much projection do you want?
How important is it for the pump to be as quiet as possible?
A 4" suction can support up to about 235 gpm, which is about 20 gpm per linear foot of sheer.
If you want to be able to hit the maximum flow rate for the sheers, you will need to provide the necessary plumbing and you will need a big enough pump.
Can you post the pump performance curve for each pump you want to consider using?
www.troublefreepool.com
If you want to be able to hit the maximum flow rate for the sheers, you will need to provide the necessary plumbing and you will need a big enough pump.
Can you post the pump performance curve for each pump you want to consider using?
Pipe Size and Flow Rates
You want to keep the water velocity below 6 ft/sec on the suction and below 8 ft/sec on the pressure side of the pump.[7]| Pipe Size | 6 ft/sec | 8 ft/sec |
|---|---|---|
| 1.5" | 38 GPM | 51 GPM |
| 2" | 63 GPM | 84 GPM |
| 2.5 | 90 GPM | 119 GPM |
| 3.0" | 138 GPM | 184 GPM |
| 4.0" | 235 GPM | 312 GPM |
Equipment Pad Best Practices - Further Reading
www.troublefreepool.com
LOL, thanks Jim.PS,
You might want to buy several sets of ear protectors.. The kind you use when shooting shotguns...
Thanks,
Jim R.
PS,
You might want to buy several sets of ear protectors.. The kind you use when shooting shotguns...
Thanks,
Jim R.
Hi James, thanks for your help. We are still in the design phase with plans submitted to HOA but details can still be changed. I haven't received a plumbing plan yet but don't believe there is anything less than 2". Only need enough projection so it doesn't dribble down the face of the column it will be mounted in (4'x4'x4'.) Pump doesn't need to be too quiet. Pool will be on the garage side of the house which is 48' long. Same length as the pool. It is an open area with no immediate neighbors only golf course area. Thanks, the data you posted is a big help!
James, this is what we are trying to accomplish. We saw this pool in action but at the time I didn't think to look at the plumbing set up and now no longer have access to the pool. I cropped the image greatly to not offend the owner in case he's on here.
Attachments
A 4" suction can support up to about 235 gpm, which is about 20 gpm per linear foot of sheer.
If you want to be able to hit the maximum flow rate for the sheers, you will need to provide the necessary plumbing and you will need a big enough pump.
Can you post the pump performance curve for each pump you want to consider using?
Pipe Size and Flow Rates
You want to keep the water velocity below 6 ft/sec on the suction and below 8 ft/sec on the pressure side of the pump.[7]
Pipe Size 6 ft/sec 8 ft/sec 1.5" 38 GPM 51 GPM 2" 63 GPM 84 GPM 2.5 90 GPM 119 GPM 3.0" 138 GPM 184 GPM 4.0" 235 GPM 312 GPM
Equipment Pad Best Practices - Further Reading
View attachment 607502
I would do a 4" suction, a 2.5" line to the 6 foot sheer and a 2" line to each of the 3 foot sheers with separate valves for each line.
You need a filter for the sheers to prevent debris clogging the slits.
I would use a IntelliFloXF VSF or a WhisperFlo XF VS 5HP Variable Speed Pump.
www.pentair.com
www.pentair.com
GPM/FT..........Total
Can use 3" Suction.
10....................120 Weak.
11....................132
________________________________
Requires 4" suction.
12....................144
13....................156
14....................120
15....................168 Medium.
16....................192
17....................204
18....................216
19....................228
20....................240 Strong.
You need a filter for the sheers to prevent debris clogging the slits.
I would use a IntelliFloXF VSF or a WhisperFlo XF VS 5HP Variable Speed Pump.
IntelliFloXF VSF Pump
Pentair IntelliFloXF VSF Pump - This innovative, variable speed & variable flow pool pump offers precision and savings for large and feature-rich pools.
WhisperFloXF® VS 5HP Variable Speed Pump
The WhisperFloXF VS 5HP Commercial Pump is the first five-horsepower variable-speed pool pump that runs on single-phase or three-phase power.
GPM/FT..........Total
Can use 3" Suction.
10....................120 Weak.
11....................132
________________________________
Requires 4" suction.
12....................144
13....................156
14....................120
15....................168 Medium.
16....................192
17....................204
18....................216
19....................228
20....................240 Strong.
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I would do 4 wall suctions.
Grey....Wall suction/main drain.
Red.........2" PVC Pipe.
Green....3" PVC Pipe.
Blue.......4" PVC Pipe.
Grey....Wall suction/main drain.
Red.........2" PVC Pipe.
Green....3" PVC Pipe.
Blue.......4" PVC Pipe.
Pump will be at ground level + pad. Pool is at same grade ground level. From pump to water features is about 25'. Thanks!
The number one mistake builders make is undersizing the suction and this can cause the pump to cavitate or underperform.
The maximum head loss for the suction needs to be less than 17 feet at full capacity.
Most builders will design the suction at 3" for this, but this is not adequate in my opinion.
The second most common problem is that the returns are ran as a single line to the fountain and then branched out to the individual sheers.
This results in uneven performance.
You want the ability to operate 1, 2 or 3 sheers independently and you want the ability to adjust each line individually to correct any imbalance.
Even a tiny bit of unequal flow can be annoying.
The maximum head loss for the suction needs to be less than 17 feet at full capacity.
Most builders will design the suction at 3" for this, but this is not adequate in my opinion.
The second most common problem is that the returns are ran as a single line to the fountain and then branched out to the individual sheers.
This results in uneven performance.
You want the ability to operate 1, 2 or 3 sheers independently and you want the ability to adjust each line individually to correct any imbalance.
Even a tiny bit of unequal flow can be annoying.
Wall suctions will pick up less debris than floor suctions, but having only 2 suction points presents a hazard at full flow.
4 suctions reduces the suction at each and this is much safer.
Also, wall suctions are rated for less flow than floor suctions.
4 suctions reduces the suction at each and this is much safer.
Also, wall suctions are rated for less flow than floor suctions.
Last edited:
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