Hayward sand filter laterals issue

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cj133

Well-known member
May 6, 2018
703
NJ
I'm completely baffled right now.
I pulled my filter apart because it's been working pretty terrible and I found the laterals had worked their way up into the multiport quite a bit and I guess kinked the top of the pipe?



Either that or it kinked from me twisting it trying to get it out. It was heck trying to get it apart

What gives?!? Is this a thing that is known to happen?
 

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I'm hoping someone can confirm but I'm betting I know what happened

Any time I turned the pump off the filter would shrink and settle from no pressure. Even going from high speed to low speed you can see it change height.

I'm betting every time I put it into high speed it would pull then up a hair and then it couldn't push them back down. Over and over since 2019.

So if that's the case...... How can this be improved?


Before my setup gets attacked it runs 4 psi in low speed 15 psi in high. It's never seen more than 16 psi
 
All filters swell and shrink as the pressure changes.

It's more noticeable on some filters than others, but it always happens.

If it's a lot where it's very obvious, then you are over-pressurizing the filter.
 
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I don't think you scenario pans out. If you had that much vacuum there are better places it can break a vacuum from before it deformed rigid pvc. Are the input and output hoses same size or possibly reversed ?
 
I found someone else had the same issue quite a few years ago on a different model Hayward.

Sand Filter - Laterals Moved Up???

I had the Hayward S166T sand filter installed at the start of the summer 3 years ago for an above ground pool. It recently started putting dirt back into the pool as soon as I started to vacuum. I pulled the filter apart to replace the sand and found the laterals sitting on top of the sand and...
www.troublefreepool.com www.troublefreepool.com



Here's my repair which funny enough is almost identical to his. But I also added a stop. I left roughly an 1/8" gap for movement and error.

PXL_20220905_154357113.jpg

PXL_20220905_153840395.jpgPXL_20220905_153615136.PORTRAIT.jpg

This is all standard sch40 1 1/2" pipe. 1.9" OD
 
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cj133 said:
I found someone else had the same issue quite a few years ago on a different model Hayward.

Sand Filter - Laterals Moved Up???

I had the Hayward S166T sand filter installed at the start of the summer 3 years ago for an above ground pool. It recently started putting dirt back into the pool as soon as I started to vacuum. I pulled the filter apart to replace the sand and found the laterals sitting on top of the sand and...
www.troublefreepool.com www.troublefreepool.com



Here's my repair which funny enough is almost identical to his. But I also added a stop. I left roughly an 1/8" gap for movement and error.

View attachment 451523

View attachment 451524View attachment 451525

This is all standard sch40 1 1/2" pipe. 1.9" OD
Click to expand...
Can you explain to me what you fixed here? My filter is doing the same thing, but I can't tell what's happening here in the photos.
 

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