Sand In Pool


Active member
Jun 3, 2020
Gainesville, GA
Pool Size
Liquid Chlorine
As the pool season is on the horizon I figured I better pay some attention to my list of things to do before summer get here. I've got a sand filter with a multiport valve, all of which only has three pool seasons on them. Last year I noticed a constant supply of sand in the robotic pool cleaner filters, but nothing noticeable in the pool. There is not an external source of sand, so the filter is the only place it can be coming from. From other posts I've seen it doesn't seem that a bad spider gasket on the multiport valve can cause sand to get into the pool, is that correct? Most of the time it seems like the advice is a broken lateral, so you just pull all the sand out and replace them. I did see one mention of making sure there is a snug fit between the connections where the center pipe fits into the multiport valve and lateral assembly. If those junctions aren't snug, how does one go about snugging them up? And with the sand out, from what I've seen it doesn't seem like sand substitutes seem to be much better that sand. Is that the consensus? Thank you.

Texas Splash

Mod Squad
TFP Expert
LifeTime Supporter
Jun 22, 2014
Texas, San Antonio/Marion, South-Central Area
Pool Size
Salt Water Generator
SWG Type
CircuPool RJ-45 Plus
You are correct on all points. For whatever reason, either a lateral got damaged or slightly separated at a connection. The center pipe perhaps, sure. A slow and methodical inspection should reveal the culprit. Take your time as to not cause any other damage during removal and installation. Remember once you're ready to reinstall the sand, add some water first to help cushion the blow from all that weight as you pour the sand into the vessel. Let us know how it goes or if you have any questions. Good luck!
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