Waters Prep Series Installation And Maintenance Manual page 136

The figure below shows an exploded view of the inlet check valve
assembly.
4. Clean and replace worn or damaged parts.
Inlet check valve assembly
Caution:
tweezers to handle the parts after cleaning them and when
reassembling the inlet check valve.
3-52 Troubleshooting, Testing, and Maintenance
Pump head
Housing seal
HOUSING SEAL
Retainer clip
RETAINER CUP
Sleeve
SLEEVE
Ball
BALL
Seat
SEAT
SEAL GUIDE
Seal guide
INLET CHECK
VALVE HOUSING
Inlet check valve housing
To protect the parts from contamination, use forceps or
PUMP
HEAD