Part Number: AR2871
Category: Pressure Washer Parts → Pump Repair Kits → Check Valve Kits
Type: AR 2871 Check Valve Kit – OEM Replacement for SXW Pressure Washer Pumps

The AR 2871 Check Valve Kit (Part #2871) is a genuine OEM replacement repair kit designed for servicing compatible Annovi Reverberi (AR) SXW and SXWA Series triplex pressure washer pumps. This complete valve kit includes six complete check valve assemblies and the required O-rings to service all three cylinders, restoring proper water flow, maintaining operating pressure, and improving overall pump performance.

Image shown for illustrative purposes only

Key Features & Benefits

• Genuine AR North America OEM check valve kit
• Part Number: 2871
• Designed for SXW and SXWA Series pressure washer pumps
• Complete check valve service kit
• Includes six complete valve assemblies and O-rings
• Services all three pump cylinders
• Restores proper one-way water flow
• Helps eliminate pressure loss and pump surging
• Improves pump efficiency and reliability
• Ideal for pump rebuilds and preventive maintenance
• OEM-quality fit and long service life

Kit Contents

The AR 2871 Check Valve Kit includes:

• (6) AR1949051 – Complete Check Valve Assemblies
• Required OEM O-Rings for valve installation

All components are genuine OEM AR North America replacement parts.

Technical Specifications

Part Number: 2871

Product Type: Check Valve Kit

Manufacturer: AR North America

Compatible Pump Series: SXW & SXWA

OEM Replacement: Yes

Compatible Pump Models

Designed for use with compatible AR North America pumps, including:

• SXW15.35
• SXW21.35
• SXWA4G50
• SXWA5.5G50
• SXWA7G50

Always verify your pump model before ordering.

Function of the Check Valve Kit

The check valve kit helps:

• Control one-way water flow through the pump
• Maintain proper operating pressure
• Prevent water backflow
• Improve pump efficiency
• Restore consistent pressure and water flow
• Protect internal pump components from premature wear

Replacing worn check valves helps restore pressure washer performance while maintaining smooth, reliable pump operation.

Common Signs Replacement Is Needed

Replace the check valve kit if you notice:

• Reduced operating pressure
• Pulsating or inconsistent pressure
• Decreased water flow
• Pump surging
• Internal valve wear
• Damaged or worn O-rings
• Pump rebuild or scheduled preventive maintenance

Replacing worn valve assemblies early helps prevent additional wear to the manifold and other internal 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 valve assemblies and O-rings.
• Clean all valve bores and sealing surfaces thoroughly.
• Inspect the manifold for wear, corrosion, or debris.
• Install the new valve assemblies and O-rings in the correct orientation.
• Reassemble the pump and verify proper pressure and leak-free operation.

Important: Inspect packings, water seals, ceramic plungers, and valve seats during service. Replacing related wear components at the same time helps maximize pump reliability and service life.

Maintenance Recommendations

• Inspect check valves during routine pump maintenance.
• Replace worn valves at the first signs of pressure loss or pump surging.
• Use clean, filtered inlet water to minimize valve wear.
• Flush the pump after use when handling dirty or corrosive water.
• Use only genuine OEM AR North America replacement parts to maintain optimum pump performance, reliability, and long service life.