Why am I Losing Sand?

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Bigfellor

Well-known member
Jul 24, 2020
49
Texas
Pool Size
13600
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
CircuPool SJ-40
At the beginning of the season I took apart my sand filter. I washed and cleaned everything and there were no noticeable cracks or breaks in any of the fingers. Sand was replaced with #20 silica sand from Leslie's Pool. I'm constantly getting sand all over the bottom of my pool and after backwashing for a few minutes this is the pile of sand that's left on the street.

Where else could this be coming from?
 

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Since this only started happening when you changed the sand, things to come to mind include:
- Too much sand
- Bad batch of sand; too fine
- Lateral or hub connection issue
- Natural process of screening out the finer particles.

But, I just noticed you said it happens after backwashing. You mean after both backwashing and rinse correct? You are doing a full rinse for a good 30 sec or more once clear in the sight glss correct?
 
Texas Splash said:
Since this only started happening when you changed the sand, things to come to mind include:
- Too much sand
- Bad batch of sand; too fine
- Lateral or hub connection issue
- Natural process of screening out the finer particles.

But, I just noticed you said it happens after backwashing. You mean after both backwashing and rinse correct? You are doing a full rinse for a good 30 sec or more once clear in the sight glss correct?
Click to expand...
This is year three with this pool and filter and I've had this problem from the beginning.

I'm not sure at what point (both?) The sand is coming out. I don't have a sight glass but today I did backwash for a minute then rinse for a minute.

So this large amount of sand was after that process. I get small amounts of sand distributed throughout the pool during normal filtration also and when the pump is running the filter sounds like sand is rattling around inside the valve. Is that normal?
 
I found this thread and it sounds like the last reply might be part of my issue.

Could a faulty sand filter head (multi-port) push sand into the pool?

Hello. Recently noticed sand in my pool (Hayward Sand Master SM2506T filter, 12 years old). I had never replaced the sand in 12 years as the pool was clean so the technician replaced the sand and the laterals. Technician noticed when he replaced the laterals and sand, that about 20-30% of the...
www.troublefreepool.com www.troublefreepool.com

I have PVC running from my filter drain so I can drain / vacuum / backwash out to the street. There's a ball valve to prevent critters from getting in there and every time I open that valve to backwash water comes out even though the filter valve is still set to filter.
 
Bigfellor said:
every time I open that valve to backwash water comes out even though the filter valve is still set to filter.
Click to expand...
The MPV was going to be my last item on the list to check. The fact you are seeing water leaking out to WASTE when it is not supposed to is an indication something isn't sealing correctly. While some Intex products don't allow much repair options, I believe the MPV's spider gasket is still one of those items you can replace. Certainly worth checking.
 
Texas Splash said:
The MPV was going to be my last item on the list to check. The fact you are seeing water leaking out to WASTE when it is not supposed to is an indication something isn't sealing correctly. While some Intex products don't allow much repair options, I believe the MPV's spider gasket is still one of those items you can replace. Certainly worth checking.
Click to expand...
I think I'm going to start with that gasket. It's an "outdoor pro" sand filter from waterway plastics and they have parts available it looks like.
waterwayplastics.com

ClearWater Sand Filter Replacement Parts - Waterway Plastics

Pool & Spa Products
waterwayplastics.com waterwayplastics.com
 
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