Is this way too many bends?
- Thread starter mrdorkdar
- Start date
- Jul 21, 2013
- 65,068
- Pool Size
- 35000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-60
The less bends the better but I am not sure you will see any difference in your pool if you don't have any problems .
The suction side of the pump is the larger problem. You should have about 8 inches of straight pipe into the pump. That 90 elbow right into the pump is not good but many folks have that without problems.
The suction side of the pump is the larger problem. You should have about 8 inches of straight pipe into the pump. That 90 elbow right into the pump is not good but many folks have that without problems.
Removing bends will help. But if that valve in front of the pipe is needed for some other purpose then maybe that is best you can do. You are in So. CA so I doubt you close your pool so not sure why you need that valve.
It is best to have at least 8-10inches of straight pipe in front of the pump. Sometimes the effort to change all of that does not significantly improve the flow. Especially if you are not having any issues with flow now.
It is best to have at least 8-10inches of straight pipe in front of the pump. Sometimes the effort to change all of that does not significantly improve the flow. Especially if you are not having any issues with flow now.
Also on a side note, that pipe is not intended to be exposed to direct sunlight, any type of spray paint will give it the protection it needs.
- May 3, 2007
- 18,067
- Pool Size
- 20000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Aqua Rite (T-15)
While many manufactures recommend straight pipe before the pump, I am of the opinion that having a straight pipe before the pump baskets makes no difference what so ever.
Here are some OpenFoam simulations that illustrate this point:
drive.google.com
The impeller inlet velocity gradients are nearly identical for the near or far case so the location of the 90 should have very little impact on the performance of the pump.
One other observation is that head loss for the near case is actually less than when the 90 is far from the pump, even though the pipe length is identical. This is because the plumbing after then 90 determines the head loss impact of the 90. So having a large pump basket after the 90, actually slightly reduces head loss. But not enough to make that much of a difference.
Here are some OpenFoam simulations that illustrate this point:
Pump Basket 90 Location - Google Drive
drive.google.com
The impeller inlet velocity gradients are nearly identical for the near or far case so the location of the 90 should have very little impact on the performance of the pump.
One other observation is that head loss for the near case is actually less than when the 90 is far from the pump, even though the pipe length is identical. This is because the plumbing after then 90 determines the head loss impact of the 90. So having a large pump basket after the 90, actually slightly reduces head loss. But not enough to make that much of a difference.
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