Brine valve hole Plug for Fleck 5000, 5600, 5810, 5812, 7000 or 9000 / 9100 models when used as a Backwash Only Valve
Oldest versions were brass, and newer versions are plastic.
Old PN 13857, and current, newest PN 40947-02
Note: Includes the o-ring, 13302.
This part has No Threads ( the threaded side plug is PN 13918 )