

Precision engineered rod displacement part that helps transfer piston motion into consistent fluid flow in HC pump systems.
| Compatible Machines |
|---|
| Graco HC Series Airless Sprayers |
| Graco Zero & One HC Pump Assemblies |
| Pneumatic Industrial Sprayer Pumps using Rod Displacement Parts |
The Graco 624891 Rod Displacement is a crucial internal part of the fluid section that helps translate piston movement into consistent fluid flow inside high‑pressure pump systems.
This OEM replacement part ensures accurate displacement geometry to maintain performance in Zero HC applications.