Description
The Bedford 18-1301 is a compatible replacement for Graco parts 181338 and 181-338 — the backup washer used in Graco spray equipment. A backup washer sits behind a seal or O-ring and gives it a rigid shoulder, preventing the softer seal from extruding into the clearance gap under pressure. Compatible with Graco EM 590.
Common reasons for replacement:
- Renewed together with the seal it backs
- Adjacent seal or O-ring failing early from extrusion
- Visible deformation or cupping of the washer
- Pressure weep past a seal the washer should support
Manufactured to OEM-equivalent dimensions for proper fit and performance.
