Part Number: 10001-01104
Category: Pressure Washer Parts → Pump Repair Kits → Piston Seal Kits
Type: Comet 10001-01104 Piston Seal Kit – 15mm OEM Replacement for ZW Pressure Washer Pumps

The Comet 10001-01104 Piston Seal Kit (Comet Part #5019.0064.00) is a genuine OEM replacement repair kit designed for servicing compatible Comet ZWD-K Series pressure washer pumps. Featuring 15 mm piston seals, this OEM kit restores proper sealing around the pump plungers, helping maintain operating pressure, reduce internal water bypass, and extend the service life of your pressure washer pump.

Key Features & Benefits

• Genuine Comet OEM piston seal kit
• Part Number: 10001-01104
• Comet Part Number: 5019.0064.00
• 15 mm piston seal replacement kit
• Designed for Comet ZWD-K Series pressure washer pumps
• Restores proper sealing performance
• Helps eliminate internal water bypass
• Maintains operating pressure and pump efficiency
• Ideal for pump rebuilds and preventive maintenance
• OEM-quality fit and durability
• Replaces previous Comet Part Number 5019.0226.00

Technical Specifications

Part Number: 10001-01104

Comet Part Number: 5019.0064.00

Replaces: 5019.0226.00

Product Type: Piston Seal Kit

Manufacturer: Comet Pumps

Seal Size: 15 mm

Compatible Pump Series: ZWD-K

OEM Replacement: Yes

Compatible Pump Models

Designed for use with compatible Comet ZWD-K Series pumps, including:

• ZWD-K 3538G
• ZWD-K 4042G
• ZWD-K 4042S

Always verify your pump model before ordering.

Function of the Piston Seal Kit

The piston seal kit helps:

• Restore proper sealing around the ceramic plungers
• Maintain operating pressure
• Reduce internal water bypass
• Improve pump efficiency
• Minimize water leakage
• Extend pump service life

Replacing worn piston seals helps restore pressure washer performance while protecting additional internal pump components from unnecessary wear.

Common Signs Replacement Is Needed

Replace the piston seal kit if you notice:

• Reduced operating pressure
• Decreased water flow
• Internal water leakage
• Worn or damaged piston seals
• Pump rebuild or scheduled preventive maintenance
• Reduced cleaning performance

Replacing worn seals promptly helps prevent premature wear to plungers, manifolds, 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 piston seals.
• Clean all sealing surfaces thoroughly.
• Inspect ceramic plungers, water seals, and the manifold for wear or damage.
• Install the new OEM piston seals in the correct orientation.
• Reassemble the pump and verify proper pressure and leak-free operation.

Important: Inspect ceramic plungers, water seals, 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 piston seals during routine pump maintenance.
• Replace worn seals at the first signs of leakage or pressure loss.
• Maintain clean, filtered inlet water to reduce seal 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.