Rena/API Filstar XP impeller cover caps the area containing the
rotor/impeller and fixes one end of the rotor shaft to stabilize the
rotor/impeller. The other end of the shaft is fixed by a rubber bearing
at the end of the rotor well. For proper filter operation the shaft must
be fixed at both ends or the rotor/impeller will not spin smoothly and
pump water efficiently. Replace this cap if showing signs of wear around
the shaft hole or if the cap will not stay locked into the motor
housing during filter operation. INCLUDES: Impeller Cover AND Center Bearing/Bushing.