Part Number: 10001-01285
Category: Pressure Washer Parts → Pump Repair Kits → Water Seal Kits
Type: Comet 10001-01285 Water Seal Kit – OEM Replacement for FW2, FWS2 & FWD2 Series Pressure Washer Pumps

The Comet 10001-01285 Water Seal Kit (Part #10001-01285) is a genuine OEM replacement repair kit designed for servicing compatible Comet FW2, FWS2, and FWD2 Series pressure washer pumps. This complete water seal kit restores proper sealing around the ceramic plungers, helping maintain operating pressure, reduce internal water bypass, eliminate leaks, and maximize pump efficiency.

Key Features & Benefits

• Genuine Comet OEM water seal kit
• Part Number: 10001-01285
• Designed for FW2, FWS2, and FWD2 Series pressure washer pumps
• Complete OEM water seal replacement kit
• Restores proper sealing performance
• Helps eliminate internal water bypass
• Maintains operating pressure and pump efficiency
• Reduces water leakage
• Ideal for pump rebuilds and preventive maintenance
• OEM-quality fit and long service life

Technical Specifications

Part Number: 10001-01285

Product Type: Water Seal Kit

Manufacturer: Comet Pumps

Compatible Pump Series: FW2, FWS2 & FWD2

OEM Replacement: Yes

Compatible Pump Models

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

FW2 Series

• FW2 3540 S
• FW2 4030 S
• FW2 4040 S
• FW2 4540 S

FWS2 Series

• FWS2 3540 S
• FWS2 4030 S
• FWS2 4040 S
• FWS2 4540 S

FWD2 Series

• FWD2 4540 E
• FWD2 5030 E
• FWD2 5040 E
• FWD2 5030 G
• FWD2 5040 G
• FWD2 5540 G

Always verify your pump model before ordering by referencing your owner's manual or pump identification tag.

Function of the Water Seal Kit

The water seal kit helps:

• Seal around the ceramic plungers
• Maintain proper operating pressure
• Prevent internal water bypass
• Reduce external water leakage
• Improve pump efficiency
• Extend pressure washer pump service life

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

Common Signs Replacement Is Needed

Replace the water seal kit if you notice:

• Water leaking from the pump manifold
• Reduced operating pressure
• Decreased water flow
• Internal water bypass
• Worn or damaged water 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 water seals and related sealing components.
• Clean all sealing surfaces thoroughly.
• Inspect ceramic plungers, high-pressure seals, low-pressure seals, and the manifold for wear or damage.
• Install the new OEM water seals in the correct orientation.
• Reassemble the pump and verify proper pressure and leak-free operation.

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

Maintenance Recommendations

• Inspect water seals during routine pump maintenance.
• Replace worn seals at the first signs of leakage or pressure loss.
• 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.