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Graco 15C997 Backup Washer Piston Valve

$5.25
In Stock
Part #: 15C997

The Graco 15C997 Backup Washer provides secondary sealing in piston-valve assemblies, preventing leaks and supporting smooth pump operation.

  • Supports primary piston-valve seal
  • OEM quality for reliable performance
  • Durable polymer material
  • Easy to replace during maintenance
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Genuine OEM Part Fast Shipping (Order by 1 PM CST) Easy Returns

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

Part Number 15C997
Type Backup washer for piston valve
Function Acts as secondary seal in valve
Material Durable polymer / elastomeric washer
Where Used In piston‑valve seats of Graco pumps
Included In Graco repair / packing kits

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

It provides a secondary seal in the piston‑valve to help prevent fluid leakage and protect the primary seal.

Reusing a worn washer is not recommended. A new 15C997 ensures proper sealing and durability.

Inspect the washer whenever you perform a piston‑valve rebuild or notice valve leakage or performance loss.

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