Part Number: LWS2020E-VRT3-160
Category: Pressure Washer Pumps → Triplex Pumps → Ready-to-Install Pump Assemblies
Type: Comet LWS2020E-VRT3-160 Pump Made Ready with Thermal Relief

The Comet LWS2020E-VRT3-160 Pump Made Ready with Thermal Relief (Part #LWS2020E-VRT3-160) is a factory-configured, ready-to-install triplex pressure washer pump assembly designed for electric pressure washer systems. Built around the Comet LWS2020E triplex pump, this complete assembly comes pre-equipped with a VRT3-160 adjustable pressure-actuated unloader, thermal relief valve, and inlet filter, allowing for quick installation with all fittings pre-connected.

Key Features & Benefits

• Genuine Comet Pump Made Ready assembly
• Part Number: LWS2020E-VRT3-160
• Built around the Comet LWS2020E triplex pump
• Pre-installed VRT3-160 adjustable pressure-actuated unloader
• Includes factory-installed thermal relief valve
• Includes inlet filter with quick-connected fittings
• Rated for up to 2.2 GPM at 2,000 PSI
• Designed for NEMA 56C electric motors
• 5/8-inch hollow shaft with reversible crankshaft
• Right-hand or left-hand mounting capability
• Forged bronze connecting rods with lifetime warranty
• Industrial ceramic plungers for exceptional wear resistance
• Stainless steel check valves and piston guides
• Oversized bearings for long service life
• Anodized die-cast aluminum crankcase for improved cooling
• Reduces installation time with factory-assembled components

Technical Specifications

Part Number: LWS2020E-VRT3-160

Pump Model: LWS2020E

Manufacturer: Comet

Product Type: Pump Made Ready Assembly

Maximum Flow Rate: 2.2 GPM

Maximum Pressure: 2,000 PSI

Maximum Pump Speed: 3,400 RPM

Minimum Horsepower Requirement: 3.0 BHP

Rated Brake Horsepower: 3.5 BHP

Shaft Size: 5/8" Hollow

Motor Mount: NEMA 56C Flange

Unloader Valve: VRT3-160

Thermal Relief Valve: Included

Inlet Filter: Included

Crankcase Capacity: 11 oz

Recommended Oil: SAE 20W/30

Weight: 13.4 lbs (pump only)

OEM Replacement: Yes

Compatible Applications

Designed for use with compatible electric pressure washer systems utilizing:

• Comet LWS2020E pump applications
• NEMA 56C electric motors
• 5/8-inch hollow motor shafts
• Commercial electric pressure washers
• Industrial cleaning equipment
• OEM equipment installations
• Pump replacement and repair projects

Always verify shaft size, motor configuration, mounting dimensions, and pressure/flow requirements before installation.

Function of the Pump Made Ready Assembly

The LWS2020E-VRT3-160 assembly helps:

• Deliver up to 2.2 GPM of water flow
• Produce operating pressures up to 2,000 PSI
• Regulate system pressure through the integrated VRT3-160 unloader valve
• Protect the pump during bypass operation with the thermal relief valve
• Filter incoming water with the included inlet filter
• Simplify installation with factory-assembled quick-connect fittings
• Provide dependable cleaning performance for electric pressure washer applications

The reversible crankshaft allows flexible installation for either right-hand or left-hand motor configurations.

Premium Pump Construction

The Comet LWS2020E features premium components engineered for long service life, including:

• Forged bronze connecting rods with lifetime warranty
• Solid industrial ceramic plungers
• Stainless steel check valves
• Hardened stainless steel piston guides
• BUNA-textile double sealing V-packings
• Oversized high-quality bearings
• Anodized die-cast aluminum crankcase
• Optimized cooling design for reduced operating temperatures

These heavy-duty components provide exceptional durability and dependable long-term performance.

Common Signs Replacement Is Needed

Replace the pump assembly if you notice:

• Reduced operating pressure
• Decreased water flow
• Excessive pump noise
• Water or oil leaks
• Pump overheating
• Unloader valve malfunction
• Damaged ceramic plungers
• Excessive internal wear
• Thermal relief valve failure

Replacing the complete pump assembly restores pressure washer performance while minimizing installation time.

Installation & Service Notes

• Shut down the pressure washer and disconnect electrical power.
• Relieve all system pressure before servicing.
• Verify compatibility with the motor shaft, NEMA flange, and mounting configuration.
• Slide the pump onto the motor shaft and secure according to the manufacturer's specifications.
• Connect the inlet and discharge plumbing using the factory-installed fittings.
• Fill the crankcase with 11 oz of SAE 20W/30 oil before initial operation.
• Prime the pump with water before startup.
• Verify proper pressure and inspect for leaks after installation.

Important: Change the pump oil after the initial 50-hour break-in period, then every 500 operating hours thereafter. Never operate the pump without an adequate water supply.

Maintenance Recommendations

• Check pump oil level regularly.
• Use SAE 20W/30 oil as recommended by Comet.
• Change oil after the first 50 hours of operation and every 500 hours thereafter.
• Inspect the inlet filter and clean as necessary.
• Verify proper operation of the VRT3-160 unloader valve.
• Inspect the thermal relief valve periodically.
• Flush the system after use when handling dirty or corrosive water.
• Use only genuine OEM Comet replacement parts and approved accessories to maintain maximum performance and service life.