High Pressure Pumps

COMET Pumps CAT Pumps GENERAL Pumps
AR Pumps	GIANT Pumps	KRANZLE Pumps	Legacy Pumps

Browse our large variety of industrial rated COMET Pumps for pressure washers and Kits. Built in Italy, most of the models come with a 5-year warranty. Comet pumps are an excellent replacement pump for most pressure washers and have a fast changeover, even in the field. Most pumps have a reversible crankcase for right or left hand mounting, and are always pre-plumbed and pre-tested.

Our high pressure pumps will come as "plumbed pumps". They come with the unloader, garden hose fitting, pressure hose fitting and thermal relief valve

Check more about pump technical information.

BXD Series

Comet BXD series axial radial pressure washer pumps are standard oem replacement pumps on many brands. Every BXD Series pump comes standard with chemical injectors and stainless steel plungers. These pressure pumps are made direct-drive for gas and electric pressure pumps.

• Built in one piece Unloader
• Stainless steel unitized check valves
• Forged brass manifolds
• Double sealing Buna packing
• Built in garden hose adapter
• Direct Drive

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SKU #	MODEL	PSI	GPM	HP	RPM	SHAFT	MOTOR	PRICE
BE-85-149-088B	BXD2020E	2000	2.0	1.5-2	3400	5/8"	Electric	$258.00
BE-85-149-081B	BXD2528G	2800	2.5	5-6.5	3400	3/4"	Gas	$258.00

BWD Series

BWD Series are commercial grade Comet triplex pump with oil sight glass and oil drain plug.

• 2000 PSI Max Pressure (138 BAR)
• Includes QC Coupler, Garden Hose, and Chemical Injector
• Direct Drive

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SKU #	MODEL	PSI	GPM	HP	RPM	SHAFT	MOTOR	PRICE
BE-85-149-083B	BWDK2020E	2000	2.2	2-3	3400	5/8"	Electric	$361.00
BE-85-149-085B	BWDK3027G	2700	3.0	6.5	3400	3/4"	Gas	$345.00

LWS Series

The LWS Series Pressure Pump is made belt-drive for a gas powered motor. With a reversible anodized, die-cast aluminum crankcase, the LWS3025S can be fitted for a left or right hand mounting. These pumps come standard with ceramic plungers and stainless steel check valves and piston guides.

• 1750 RPM
• 24MM Solid Keyed Shaft
• 1/2” FPT Inlet, 3/8” FPT Discharge
• Belt-Drive

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SKU #	MODEL	PSI	GPM	HP	RPM	SHAFT	MOTOR	PRICE
BE-85-149-065B	LWS3025S	2500	3.0	6.5	1750	24MM	Gas	$455.00

AWD Series

New to the Comet family, the AWD Series pump is built tough for a long life. Each pump has a built in one piece Unloader, and chemical injectors. These Direct-Drive pressure pumps are designed for gas powered motors.

• Heat resistant industrial ceramic plungers
• Stainless steel unitized check valves
• Forged brass manifolds
• Double sealing Buna packing
• Built in garden hose adapter
• Direct-Drive

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SKU #	MODEL	PSI	GPM	HP	RPM	SHAFT	MOTOR	PRICE
BE-85-149-077B	AWDK4036G	3600	4.0	13	3400	1"	Gas	$427.00

ZWD Series

Comet ZWD direct drive series pumps are for all heavy duty commercial pressure washing applications. ZWD Direct-Drive pumps couple to all standard one inch gasoline engine shafts. Each ZWD pump comes standard with an enlarged crankcase to increase oil capacity for better lubrication and lower operating temperatures, and is reversible for right or left hand mounting.

• High efficiency stainless steel check valves
• One piece industrial oversized bronze connecting rods
• Direct-Drive

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SKU #	MODEL	PSI	GPM	HP	RPM	SHAFT	MOTOR	PRICE
BE-85-149-011B	ZWD3030G	3000	3.0	9	3400	1"	Gas	$397.90
BE-85-149-022B	ZWD4040G	4000	4.0	13	3400	1"	Gas	$446.10
BE-85-149-075B	ZWDK4036G	3600	4.0	13	3400	1"	Gas	$444.00

Download Specs and Diagram (ZWD series)

HW & HWS Series

The HW and HWS Series is a standard oem replacement pump for many popular pressure washer brands. Comet HWS series pumps come with standard twenty four millimeter solid shafts and can be belt or gear driven. Each pump has an optimal anodized aluminum crankcase for high speed operation.

• Special high and low pressure seals with Buna V packing
• Solid ceramic plungers
• High quality ball bearings
• Forged bronze connecting rods
• Unloader valve is Pump Mounted on HW Series and Block Mounted on HWS Series
• Belt Drive

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SKU #	MODEL	PSI	GPM	HP	RPM	SHAFT	MOTOR	PRICE
BE-85-149-031AB	HW3540S	4000	3.5	11-13	1450	24mm	Gas	$599.00
BE-85-149-031B	HWS3540S	4000	3.5	11-13	1450	24mm	Gas	$569.80
BE-85-149-030B	HWS5040S	4000	3.5	20	1750	24mm	Gas	$629.60

Download Specs and Diagram (HWS series)

TW Series

The TW Series is made for max stress for all your tough jobs. TW pressure pumps have a 24mm solid shaft for belt-drive, gear box, or flex couplers made for gas powered motors. Each pump has a. The TW Series pump features Die-Cast Aluminum Alloy crankcase that is not only made to protect against rust and corrosion, but is also oversized designed to dissipate heat and improves lubrication for a long life.

• Heat treated stainless steel piston guides
• Stainless Steel check valves
• Ceramic Plungers
• Brass Manifold
• External Unloader Valve
• Belt Drive

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SKU #	MODEL	PSI	GPM	HP	RPM	SHAFT	MOTOR	PRICE
BE-85-149-059B	TW5050	2700	3.5	5-7.5	1450	24mm	Gas	$1,046.80
BE-85-149-062B	TW8030	3000	8.0	24	1450	24mm	Gas	$1,199.00
BE-85-149-064B	TW10025	2500	10.0	24	1450	24mm	Gas	$1,184.00

Download Specs and Diagram

TW Series with Gear Box

• Pump Mounted Unloader Valve
• Direct Drive

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SKU #	MODEL	PSI	GPM	HP	RPM	SHAFT	MOTOR	PRICE
BE-85-149-059GB	TW5050	2700	3.5	5-7.5	1450	24mm	Gas	$1,379.00
BE-85-149-062GB	TW8030	3000	8.0	24	1450	24mm	Gas	$1,409.00
BE-85-149-064GB	TW10025	2500	10.0	24	1450	24mm	Gas	$1,409.00

LWD Series

Over built for its class with oversized ball bearings and forged brass connecting rods. Optimal oil bath makes working at high speed look too easy. Don't forget to get some extra pump oil.

• 1/2" FPT Inlet, 3/8" FPT Discharge
• Anodized, Die-Cast Aluminum Crankcase
• Solid Ceramic Plungers
• Stainless Steel Check Valves & Piston Guides
• Buna-Textile V-Packing
• Reversible Crankcase for Right or Left Hand Mounting
• Direct Drive

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SKU #	MODEL	PSI	GPM	HP	RPM	SHAFT	MOTOR	PRICE
BE-85-149-009B	LWDK3020G	2000	3.0	5.5	3400	3/4"	Gas	$358.99
BE-85-149-015B	LWDK3025G	2500	3.0	6.5	3400	3/4"	Gas	$351.30
BE-85-149-005B	LWD3020E	2000	3.0	3	3400	5/8"	Electric	$455.00

Download Specs and Diagram (LWD-K series)
Download Specs and Diagram (LWD model)

FW Series

High quality tapered roller bearings, iodized aluminum crankcase and stainless steel piston guides help build the strength of this "work horse". Every FWS Series pump is equipped with a reversible anodized, die-cast aluminum crankcase that can be used either left or right hand mounted.

• 1/2" FPT Inlet, 3/8" FPT Discharge
• Solid Ceramic Plungers
• Stainless Steel Check Valves and Piston Guides
• Oversized Bronze Connecting Rods
• Buna-Textile V-Packing
• 184T Electric Motor Flange with 1-1/8" Hollow Shaft
• Direct Drive

Ordering Information - FREE Shipping

SKU #	MODEL	PSI	GPM	HP	RPM	SHAFT	MOTOR	PRICE
BE-85-149-017B	FWS3530E	2700	3.5	5-7.5	1750	1-1/8"	Electric	$519.80
BE-85-149-008B	FWS4030E	3000	4.0	10	1750	1-1/8"	Electric	$548.60

Download Specs and Diagram (FWS series Part 1)
Download Specs and Diagram (FWS series Part 2)

Please use the Comet Repair Chart Below to find the correct parts you need to repair all of your Comet Pressure Pumps. All Comet Pump repair kits contain the total elements necessary to rebuild the entire Comet pump. LW, ZW, FW, and HW Series Pumps consist of hot water seals only, and contain a hot water seal protection. Viton seals are chemically resistant. Pricing is listed below the repair kit chart.

If you are not sure on the part you need for your COMET pressure washer pump, please refer to the COMET pump breakdown diagrams located near each pump. If you still need further support, please send us an e-mail to info@ultimatewasher.com with your COMET pump model number and the part that you need.

Seal Kits

KIT #	PUMP MODEL	PRICE
BE-5019066700	BXD2020E, BXD2528G	$57.60
BE-5019068400	BWDK2020E, BWDK3027G	Call for Pricing
BE-5019003700	LWS3025	$52.00
BE-5019068600	AWDK4036	Call for Pricing
BE-5019006400	ZWDK4036G, ZWD4040G	$60.80
BE-5019063100	HW3540S, HWS3540S, HWS5040S	$158.40
BE-5019064600	TW8030	$150.40
BE-5019064700	TW10025, TW10025	$150.40
BE-5019064500	TW5050	$132.00
BE-5019003500	LWDK Series	$56.00
BE-5019003800	FWS3530E, FWS4030E	$107.20

Valve Kits

KIT #	PUMP MODEL	PRICE
BE-5025001400	BXD2020E, BXD2528G	$40.00
BE-502403000	BWDK2020E, BWDK3027G	Call for Pricing
BE-KIT001	LWS3025, ZWDK4036G, ZWD4040G, HW3540S, HWS3540S, HWS5040S, FWS3530E, FWS4030E, LWDK Series	$34.40
BE-5025003000	AWDK4036	Call for Pricing
BE-5025002100	TW8030, TW10025, TW5050	$109.60

Oil Caps

KIT #	PUMP MODEL	PRICE
BE-3200008600	BXD2020E, BXD2528G	$8.00
BE-3200005100	BWDK2020E, BWDK3027G, LWS3025, AWDK4036, ZWDK4036G, ZWD4040G, HW3540S, HWS3540S, HWS5040S, FWS3530E, FWS4030E, LWDK Series	$5.60
BE-3200007500	TW8030, TW10025, TW5050	$6.40

Unloader Valves

KIT #	PUMP MODEL	PRICE
BE-121504200	BXD2020E	$80.80
BE-1215040300	BXD2528G, LWDK Series	$80.00
BE-85-300-003	LWS3025	$44.80
BE-1215040400	ZWDK4036G	$122.40
BE-85-300-207	ZWD4040G, HW3540S	$92.80
BE-85-300-212	HWS3540S	$126.70
BE-AL607EZ	HWS5040S	$69.60
BE-85-310-003	TW8030, TW10025	$118.40
BE-85-300-013	TW5050	$118.40
BE-85-300-206	FWS3530E, FWS4030E	$94.40

Pistons

KIT #	PUMP MODEL	PRICE
BE-2020001800	LWS3025	$53.60
BE-0202002000	ZWDK4036G, ZWD4040G	$44.00
BE-0202004200	HW3540S, HWS3540S, HWS5040S, TW5050, LWDK Series	$59.20
BE-0202004300	TW8030	$50.40
BE-0202004400	TW10025	$51.20
BE-0202002200	FWS3530E, FWS4030E	$51.20

Correct Pump Installation is essential for optimum performance.
It is recommended that the pump flow capacity be oversized for the actual flow required. For optimum running of the system the water circulated through the regulating valve should not exceed 10 - 15% of the pump flow. Recirculating too much water can generate heat in the supply tank increasing the cavitation risk.

Frequently Asked Questions

How much should you reduce the pump RPM to achieve a lower flow capacity?

What diameter of pulley must I use to achieve the correct pump RPM?

What if I cannot change the engine / motor pulley?

If the engine / motor is running at a lower RPM than the maximum pump RPM allowed, what will be the pump flow capacity?

What is the approximate power required to achieve the max. performances allowed?

Conditions to prevent pump cavitation: Minimum difference in height HZ (pos/neg) between pump and water level.
The minimum inlet pressure value of the pump is limited by the cavitation phenomenon. Cavitation is the forming of vapor bubble when the local pressure is below the vapor pressure of the liquid. Bubbles flow together with the liquid and when they reach a higher pressure area, they collide, generating abnormal stresses that are extremely dangerous to the pump components.

To avoid the risk of cavitation, it is necessary that the pump installation is correct.

For more information about seal and valve kits,
contact us at Toll Free 866-858-4982

Please call to place an order.
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• To prevent freezing use Environmentally Friendly or R.V. Antifreeze. (Always use for winter storage.)
• Change oil every 3-5 months or every 500 hours of operation (initial break-in oil change after first fifty hours).
• Flush water valves and detergent injectors with plain water on a regular basis after use.
• Use Line Strainer, 50 mesh minimum.
• Never store pump with water in it.
• Consult with us for chemical use.