Part Number: AR2782
Category: Pressure Washer Parts → Pump Repair Kits → Water Seal Kits
Type: AR 2782 Water Seal Kit – 20mm for XW & XWA Pressure Washer Pumps

The AR 2782 Water Seal Kit (Part #2782) is a genuine OEM replacement repair kit designed for servicing compatible Annovi Reverberi (AR) XW and XWA Series pressure washer pumps. Engineered with 20 mm water sealing components, this OEM kit restores proper sealing around the ceramic plungers, helping maintain operating pressure, eliminate water leakage, and extend the service life of your high-pressure pump.

Key Features & Benefits

• Genuine AR (Annovi Reverberi) OEM water seal kit
• Part Number: 2782
• Designed for XW and XWA Series pressure washer pumps
• 20 mm water seal replacement kit
• Complete OEM water seal rebuild kit
• Restores proper sealing performance
• Helps eliminate water leakage
• Maintains operating pressure and pump efficiency
• Ideal for pump rebuilds and preventive maintenance
• OEM-quality fit and durability

Kit Contents

The AR 2782 Water Seal Kit includes:

• (3) AR1940440 – High Pressure Packings
• (3) AR1941220 – Slit O-Rings
• (3) AR1940470 – Low Pressure Seals
• (3) AR820490 – O-Rings

All components are genuine OEM AR replacement parts.

Technical Specifications

Part Number: 2782

Product Type: Water Seal Kit

Manufacturer: AR (Annovi Reverberi)

Seal Size: 20 mm

Compatible Pump Series: XW & XWA

OEM Replacement: Yes

Compatible Pump Models

Designed for use with compatible AR pumps, including:

• XWM1530N
• XWM2128N
• XWM2623N
• XW3025N
• XWAM4G40N
• XWAM55G40N
• XWAM7G40N
• XWAM8G35N
• XWA9G30N

Always verify your pump model and seal size before ordering.

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 pump service life

Replacing worn water seals helps restore pressure washer performance while protecting internal pump components from unnecessary 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
• Worn or damaged water seals
• Cracked or flattened O-rings
• Pump rebuild or scheduled preventive maintenance

Replacing worn sealing components 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 seals, packings, and O-rings.
• Clean all sealing surfaces thoroughly.
• Inspect ceramic plungers and the manifold for wear or damage.
• Lubricate new seals lightly before installation.
• Install all components in the correct orientation.
• Reassemble the pump and verify proper pressure and leak-free operation.

Important: Inspect ceramic plungers, check valves, and additional sealing components during service. Replacing related wear items together helps maximize pump reliability and long-term performance.

Maintenance Recommendations

• Inspect water seals during routine pump maintenance.
• Replace worn sealing components 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 AR replacement parts to maintain optimum pump performance, reliability, and long service life.