Sand in sight glass....


Well-known member
Jun 27, 2009
I have a buddy who replaced his sand in filter before I could get over there to help him,and now he has a little bit of sand in sight glass with system running on filter......I backwashed a few times and won't blow sand out. does anyone think there is a leak,break in laterals or pvc pipe isn't all the way up in the multivalve?

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TFP Expert
Platinum Supporter
LifeTime Supporter
May 7, 2007
Silver Spring, MD
That shouldn't be a problem. Every now and then you get a little sand coming out of the filter when you backwash. Some of that sand could easily have gotten into the sight glass.