Graco 25D188 Piston Repair Kit PTFE/PE

Graco 25D188 PTFE/PE Piston Repair Kit Specifications

Compatible Machines

Designed for Graco pump lowers that use the 115-size piston packing configuration.

• Graco Xtreme™ Lower Pumps – 115cc class
• Graco XP Proportioner Systems with 115cc fluid sections
• Industrial Graco airless sprayer packages using compatible 115-size lowers

Key Product Information

Product Description

The Graco 25D188 Kit, Repair, Piston, PTFE/PE (115) is an OEM piston seal kit used to rebuild piston assemblies in compatible 115-size Graco lower pumps. It includes PTFE and UHMWPE packings selected for long service life, chemical resistance, and stable sealing performance in demanding spray and coating applications.

Replacing worn piston packings helps maintain consistent pressure, reduce internal leakage, and extend pump service intervals. Always verify your lower pump size and parts diagram before ordering and installation.

When To Use This Kit

• During scheduled lower pump overhaul
• When pressure loss or internal bypass is observed
• If piston packings show wear or chemical damage
• As part of preventive maintenance programs

Frequently Asked Questions