Graco 15C997 Backup Washer Piston Valve

Graco 15C997 Backup Washer – Description & Role

The Graco 15C997 is a backup washer used in the piston-valve assembly of Graco displacement pumps. It provides a secondary sealing surface that supports the main valve components, helping maintain fluid control and preventing leakage.

Specifications

Key Features

• Secondary sealing: Supports primary valve seal
• OEM integrity: Designed by Graco for exact fit
• Durable build: Withstands repeated piston cycles
• Easy to replace: Small, low‑complexity part

Installation Notes

• Disassemble valve to access old washer
• Remove the worn backup washer carefully
• Clean seating surface before installing new part
• Install new 15C997 washer in proper orientation
• Reassemble piston‑valve components and test for leaks

Frequently Asked Questions