pentair 4000 series

  1. G

    My 4000 series Pentair DE filter is leaking water from the backwash pipe.

    I was in process of cleaning the filter tank assembly and decided to get to a side problem of the filter having a small leak while the pump/filter is running. Got to removing the manifold and center rod to attempt to get to lower o'ring since the o'rings do eventually get old. Anyone have any...