Part Number: 10001-01617
Category: Pressure Washer Parts → Pump Repair Kits → Check Valve Kits
Type: Comet 10001-01617 Valve Kit – OEM Replacement for TW Series Pressure Washer Pumps

The Comet 10001-01617 Valve Kit (Comet Part #5025.0021.00) is a genuine OEM replacement check valve kit designed for servicing compatible Comet TW Series pressure washer pumps operating at 4,000 PSI and above. This complete valve kit restores proper one-way water flow, helping maintain operating pressure, eliminate pump surging, improve efficiency, and extend the service life of your high-pressure pump.

Key Features & Benefits

• Genuine Comet OEM valve kit
• Part Number: 10001-01617
• Comet Part Number: 5025.0021.00
• Designed for TW Series pressure washer pumps
• Intended for 4,000+ PSI TW pump models
• Complete suction and discharge valve replacement kit
• Restores proper one-way water flow
• Helps eliminate pressure loss and pump surging
• Improves pump efficiency and cleaning performance
• Ideal for pump rebuilds and preventive maintenance
• OEM-quality fit and long service life

Kit Contents

The Comet 10001-01617 Valve Kit includes:

• (6) Complete Suction Valve Assemblies
• (6) Complete Discharge Valve Assemblies
• Valve Seats
• Valve Discs (Poppets)
• Valve Springs
• Valve Cages
• O-Rings
• Anti-Extrusion Rings

All components are genuine OEM Comet replacement parts.

Technical Specifications

Part Number: 10001-01617

Comet Part Number: 5025.0021.00

Product Type: Check Valve Kit

Manufacturer: Comet Pumps

Application: Suction & Discharge Valve Replacement

Compatible Pump Series: TW Series (4,000+ PSI Models)

OEM Replacement: Yes

Compatible Pump Models

Designed for use with compatible Comet TW Series pressure washer pumps, including:

• TW 4550 S
• TW 5050 S
• TW 5550 S

Always verify your pump model and operating pressure before ordering.

Function of the Valve Kit

The valve kit helps:

• Control one-way water flow through the pump
• Maintain proper operating pressure
• Prevent water backflow
• Restore consistent water flow
• Improve pump efficiency
• Extend pressure washer pump service life

Replacing worn valve assemblies helps restore pressure washer performance while protecting internal pump components from unnecessary wear.

Common Signs Replacement Is Needed

Replace the valve kit if you notice:

• Reduced operating pressure
• Pulsating or inconsistent pressure
• Decreased water flow
• Pump surging
• Worn or damaged valve assemblies
• Pump rebuild or scheduled preventive maintenance
• Reduced cleaning performance

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

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

Maintenance Recommendations

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