Part Number: 10001-01078
Category: Pressure Washer Parts → Pump Repair Kits → High Pressure Seal Kits
Type: Comet 10001-01078 18mm High Pressure Seal Kit – OEM Replacement for LWS Series Pressure Washer Pumps

The Comet 10001-01078 High Pressure Seal Kit (Comet Part #5019.0037.00) is a genuine OEM replacement repair kit designed for servicing compatible Comet LWS Series pressure washer pumps equipped with 18 mm ceramic plungers. This OEM seal kit restores proper high-pressure sealing, helping maintain operating pressure, reduce internal water bypass, and maximize pump efficiency for demanding pressure washing applications.

Key Features & Benefits

• Genuine Comet OEM high pressure seal kit
• Part Number: 10001-01078
• Comet Part Number: 5019.0037.00
• Designed for Comet LWS Series pressure washer pumps
• Compatible with 18 mm ceramic plungers
• Restores high-pressure sealing performance
• Helps eliminate internal water bypass
• Maintains operating pressure and pump efficiency
• Reduces leakage and seal wear
• Ideal for pump rebuilds and preventive maintenance
• OEM-quality fit and long service life

Technical Specifications

Part Number: 10001-01078

Comet Part Number: 5019.0037.00

Product Type: High Pressure Seal Kit

Manufacturer: Comet Pumps

Seal Size: 18 mm

Compatible Pump Series: LWS

OEM Replacement: Yes

Compatible Pump Models

Designed for use with compatible Comet LWS Series pressure washer pumps equipped with 18 mm ceramic plungers.

Always verify your pump model and plunger size before ordering.

Function of the High Pressure Seal Kit

The high pressure seal kit helps:

• Maintain proper high-pressure sealing
• Prevent internal water bypass
• Restore operating pressure
• Improve pump efficiency
• Reduce water leakage
• Extend pressure washer pump service life

Replacing worn high-pressure seals helps restore pressure washer performance while protecting additional internal pump components from premature wear.

Common Signs Replacement Is Needed

Replace the high pressure seal kit if you notice:

• Reduced operating pressure
• Decreased water flow
• Water leaking from the pump manifold
• Internal water bypass
• Worn or damaged seals
• Pump rebuild or scheduled preventive maintenance
• Reduced cleaning performance

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

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

Maintenance Recommendations

• Inspect high-pressure seals during routine pump maintenance.
• Replace worn seals at the first signs of pressure loss or leakage.
• Maintain clean, filtered inlet water to minimize 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.