Part Number: AR2746
Category: Pressure Washer Parts → Pump Repair Kits → Ceramic Piston Kits
Type: AR 2746 Ceramic Piston Kit – 18mm for XM & XMA Pressure Washer Pumps

The AR 2746 Ceramic Piston Kit (Part #2746) is a genuine OEM replacement repair kit designed for servicing compatible Annovi Reverberi (AR) XM and XMA Series pressure washer pumps. Featuring 18 mm ceramic pistons, this OEM kit restores proper pump operation, maintains operating pressure, and extends the service life of your high-pressure pump.

Key Features & Benefits

• Genuine AR (Annovi Reverberi) OEM ceramic piston kit
• Part Number: 2746
• Designed for XM and XMA Series pressure washer pumps
• 18 mm ceramic piston replacement kit
• Restores operating pressure and pump efficiency
• Helps reduce leakage and internal wear
• Highly wear-resistant ceramic construction
• Ideal for pump rebuilds and preventive maintenance
• OEM-quality fit and performance
• Designed for commercial and industrial pressure washer pumps

Technical Specifications

Part Number: 2746

Product Type: Ceramic Piston Kit

Manufacturer: AR (Annovi Reverberi)

Piston Size: 18 mm

Compatible Pump Series: XM & XMA

OEM Replacement: Yes

Compatible Pump Models

Designed for use with compatible AR pumps, including:

• XM Series
• XMA Series

Always verify your pump model and piston size before ordering.

Function of the Ceramic Piston Kit

The ceramic piston kit helps:

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

Replacing worn ceramic pistons helps restore pressure washer performance while reducing wear on additional pump components.

Common Signs Replacement Is Needed

Replace the ceramic piston kit if you notice:

• Reduced operating pressure
• Water leakage around the plungers
• Worn, chipped, or cracked ceramic pistons
• Excessive internal pump wear
• Pump rebuild or scheduled preventive maintenance
• Decreased cleaning performance

Replacing worn pistons promptly helps prevent damage to packings, water seals, manifolds, and other critical pump components.

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 related hardware.
• Clean all sealing surfaces thoroughly.
• Inspect packings, water seals, and the manifold for wear or damage.
• Install the new ceramic pistons according to the manufacturer's specifications.
• 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 service life.

Maintenance Recommendations

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