Graco 16W509 Piston Seat Repair Kit

The Graco 16W509 Piston Seat Repair Kit restores proper sealing in ToughTek piston pumps, improving performance and reducing internal leakage.

Replaces worn piston seat & seals
Durable wear-resistant components
Ensures smooth pump flow & pressure
Fits selected Graco ToughTek models

Retail Price: $143.5

You save: $14.92 (10.40%)

Our Price: $128.58

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Description

Graco 16W509 Piston Seat Repair Kit – Details & Compatibility

Compatible Machines

This Graco 16W509 Piston Seat Repair Kit is used in several Graco ToughTek piston-pump systems. Below are the machines that accept this part:

ToughTek M680a
ToughTek M680a-CS
ToughTek S340e
ToughTek F340e
ToughTek F800e

Product Overview

The 16W509 Piston Seat Repair Kit replaces the piston seat and sealing components inside Graco ToughTek piston-pump assemblies. It restores proper sealing of the check-valve area, improving flow stability and reducing leakage caused by worn or damaged internal seats.

Key Features

Manufactured with hardened materials for extended service life.
Includes piston seat and essential sealing components.
Ensures proper pump check-valve sealing and reduces internal bypass.
Suitable for abrasive materials such as mortars, epoxies and specialty coatings.

Technical Information

Part Number	16W509
Part Type	Piston Seat Repair Kit
Material	Hardened wear-resistant construction
Used In	Piston-pump check valve assembly

Frequently Asked Questions

It replaces the piston seat and sealing components responsible for check-valve sealing inside the pump, helping restore proper fluid direction and pressure.

Install the kit when the pump shows signs of internal bypass, pressure loss, inconsistent output or leakage caused by worn seating surfaces.

No. It is only compatible with specific Graco ToughTek piston-pump models listed in the compatibility section above.