after backwashing my sand filter when i start the pump back up after backwashing it pumps sand or fine dirt back into the pool .
i changed the plunger already.
Is this a new filter, or did you just replace the sand?
It may be just sediment blowing through and will subside soon.
If it's older sand, you may have a crack in one of your filter laterals.
There's also the Rinse position on the valve, which "settles" the sand back down before going back to the Filter mode.
Filter --> Backwash --> Rinse --> Filter
my filter is less than a year old ut no real new. the planger pushes down to backwash and pulls up to lock in place to filter. i don't know what you mean by rinse.
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