Part Number: 2409.0116.00
Category: Pressure Washer Parts → Pump Repair Kits → Ceramic Piston Kits
Type: Comet 2409.0116.00 18mm Ceramic Piston Kit – OEM Replacement for TW Series Pressure Washer Pumps

The Comet 2409.0116.00 Ceramic Piston Kit (Part #2409.0116.00) is a genuine OEM replacement repair kit designed for servicing compatible Comet TW Series pressure washer pumps. Featuring 18 mm ceramic pistons, this complete OEM repair kit restores proper pump operation, maintains operating pressure, and extends the service life of your high-pressure pump.

Key Features & Benefits

• Genuine Comet OEM ceramic piston kit
• Part Number: 2409.0116.00
• Designed for Comet TW Series pressure washer pumps
• Precision 18 mm ceramic pistons
• Includes three ceramic pistons and mounting hardware
• Restores operating pressure and pump efficiency
• Highly wear-resistant ceramic construction
• Helps reduce seal and packing wear
• Ideal for pump rebuilds and preventive maintenance
• OEM-quality fit and long service life

Kit Contents

The Comet 2409.0116.00 Piston Kit includes:

• (3) 18 mm Ceramic Pistons
• Mounting hardware (nuts and washers)

Note: Water seal and packing kits are not included and must be purchased separately if needed.

Technical Specifications

Part Number: 2409.0116.00

Product Type: Ceramic Piston Kit

Manufacturer: Comet Pumps

Piston Diameter: 18 mm

Compatible Pump Series: TW

OEM Replacement: Yes

Compatible Pump Models

Designed for use with compatible Comet TW Series pressure washer pumps equipped with 18 mm ceramic pistons.

Always verify your pump model and piston diameter before ordering.

Function of the Ceramic Piston Kit

The ceramic piston kit helps:

• Restore proper piston movement
• Maintain operating pressure
• Improve pump efficiency
• Reduce internal leakage
• Protect packings and water seals
• Extend pressure washer pump service life

Replacing worn ceramic pistons helps restore pressure washer performance while protecting additional internal pump components from premature wear.

Common Signs Replacement Is Needed

Replace the ceramic piston kit if you notice:

• Reduced operating pressure
• Water leakage around the plungers
• Chipped or cracked ceramic pistons
• Scored or worn piston surfaces
• Pump rebuild or scheduled preventive maintenance
• Reduced cleaning performance

Replacing damaged pistons promptly helps prevent premature wear to packings, water seals, and the pump manifold.

Installation & Service Notes

• Shut down the pressure washer and relieve all system pressure.
• Remove the pump manifold according to the manufacturer's service procedures.
• Carefully remove the existing ceramic pistons and mounting hardware.
• Inspect the piston rods, packings, water seals, and manifold for wear or damage.
• Clean all sealing surfaces thoroughly.
• Install the new OEM ceramic pistons using the supplied mounting hardware.
• Reassemble the pump and verify proper pressure and leak-free operation.

Important: Inspect water seals, packings, O-rings, and check valves during service. Replacing related wear components at the same time helps maximize pump reliability and long-term performance.

Maintenance Recommendations

• Inspect ceramic pistons during routine pump maintenance.
• Replace damaged or worn pistons immediately.
• Maintain clean, filtered inlet water to minimize abrasive wear.
• Never operate the pump without an adequate water supply.
• Use only genuine OEM Comet replacement parts to maintain optimum pump performance, reliability, and long service life.