High Pressure 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.

Determining Right or Left Hand Shafts

Face the pump manifold when determining shaft position

Hollow Shaft Pumps
pressure washer pump
Left Handed
Pressure Washer Pumps
Right Handed
Solid Shaft Pumps
Giant Pump P200 Series
Left Handed
Annovi Riverbri Pump
Right Handed

COMET High Pressure Pumps

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.

Features:

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

Ordering Information - FREE SHIPPING

SKU # MODEL PSI GPM HP RPM SHAFT MOTOR PRICE
85.149.088B BXD2020E 2000 2.0 1.5-2 3400 5/8" Electric $401.75add to cart
85.149.081B BXD2528G 2800 2.5 5-6.5 3400 3/4" Gas $242.90add to cart
BWD Series

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

Features:

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

Ordering Information - FREE SHIPPING

SKU # MODEL PSI GPM HP RPM SHAFT MOTOR PRICE
85.149.085B BWDK3027G 2700 3.0 6.5 3400 3/4" Gas $407.75add to cart

 pdficon Download Specs and Diagram (BW series)

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.

Features:

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

Ordering Information - FREE SHIPPING

SKU # MODEL PSI GPM HP RPM SHAFT MOTOR PRICE
85.149.065B LWS3025S 2500 3.0 6.5 1750 24MM Gas $445.25add to cart

Comet Pumps

Pump
ZDW4040G

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.

Features:

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

Ordering Information - FREE SHIPPING

SKU # MODEL PSI GPM HP RPM SHAFT MOTOR PRICE
6820 ZWD3030G 3000 3.0 9 3400 1" Gas $447.65add to cart
85.149.022B ZWD4040G 4000 4.0 13 3400 1" Gas $465.90add to cart
85.149.075B ZWDK4036G 3600 4.0 13 3400 1" Gas $447.65add to cart

pdficon Download Specs and Diagram (ZWD series)

HW Series

The HW and Series is a standard oem replacement pump for many popular pressure washer brands.

Features:

  • 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
  • By Pass Hoses
  • Inline Filter
  • 3/8" Fittings
  • Belt Drive

Ordering Information - FREE SHIPPING

SKU # MODEL PSI GPM HP RPM SHAFT MOTOR PRICE
85.149.031AB HW3540S 4000 3.5 11-13 1450 24mm Gas $719.15add to cart

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.

Features:

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

Ordering Information - FREE SHIPPING

SKU # MODEL PSI GPM HP RPM SHAFT MOTOR PRICE
85.149.059B TW5050 5000 5 24 1450 24mm Gas $1,324.40add to cart

 pdficon Download Specs and Diagram

TW Series with Gear Box

Features:

  • Pump Mounted Unloader Valve
  • Direct Drive

Ordering Information - FREE SHIPPING

SKU # MODEL PSI GPM HP RPM SHAFT MOTOR PRICE
85.149.059GB TW5050 5000 5 24 1450 24mm Gas $1,232.00add to cart
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.

Features:

  • 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
85.149.017B FWS23530E 3000 3.5 5 - 7.5 1750 1-1/8" Electric $564.30add to cart
BN-2999 FWS4030E 3000 4.0 10 1750 1-1/8" Electric $720.85add to cart
85.149.033B FWS24530E 3000 4.5 10 1750 1-1/8" Electric $688.75add to cart

 pdficon Download Specs and Diagram (FW series)

COMET Pump Repair Kit Chart

p>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.

PUMP MODEL SEAL KITS VALVE KITS OIL CAPS UNLOADER PISTON
BXD2020E 5019066700 5025001400 3200008600    
BXD2528G 5019066700 5025001400 3200008600    
BWDK2020E 5019068400   UW11-PW3251 CALL  
BWDK3027G 5019068400   UW11-PW3251 CALL  
LWS3025 5019003700 KIT001 UW11-PW3251 85.300.003
AWDK4036   5112 UW11-PW3251 CALL  
ZWDK4036G 5019006400 KIT001 UW11-PW3251   0202002000
ZWD4040G 5019006400 KIT001 UW11-PW3251 85.300.207 0202002000
HW3540S KIT001 UW11-PW3251 85.300.207 0202002000
HWS3540S KIT001 UW11-PW3251 0202002000
HWS5040S KIT001 UW11-PW3251 AL607EZ 0202002000
TW8030 5019064600 5025002100 3200007500   0202004300
TW10025   5025002100 3200007500    
TW5050 5019064500 5025002100 3200007500   0202004200
LWDK SERIES 5019003500 KIT001 UW11-PW3251   0202002000
FWS3530E 5019003800 KIT001 UW11-PW3251   0202002200
FWS4030E 5019003800 KIT001 UW11-PW3251   0202002200
Seal Kits

(Shipping charge of $8.95 will apply on these items if the total order is less than $69.00)

KIT # PUMP MODEL PRICE
5019066700 BXD2020E, BXD2528G $70.00add to cart
5019003700 LWS3025 $80.00add to cart
5019006400 ZWDK4036G, ZWD4040G $92.00add to cart
5019006500 ZWD2530G, ZWD3030G, ZWD4030G, ZWD4040G,
ZWDK3030, ZWDK4036, ZWDK4040
$50.00add to cart
5019064600 TW8030 $183.60add to cart
5019064500 TW5050 $181.80add to cart
5019003500 LWDK Series $82.00add to cart
5019068400 BWDK Series $80.00add to cart
5019003800 FWS3530E, FWS4030E $158.00add to cart
Valve Kits

(Shipping charge of $8.95 will apply on these items if the total order is less than $69.00)

KIT # PUMP MODEL PRICE
5025001400 BXD2020E, BXD2528G $68.00add to cart
KIT001 LWS3025, ZWDK4036G, ZWD4040G, HW3540S, HWS3540S, HWS5040S, FWS3530E, FWS4030E, LWDK Series $57.30add to cart
5025002100 TW8030, TW10025, TW5050 $166.00add to cart
5112 Valve Kit $74.25add to cart
Oil Caps

(Shipping charge of $8.95 will apply on these items if the total order is less than $69.00)

PART # DESCRIPTION PRICE
UW11-PW3251 Oil Cap with Dipstick $7.85add to cart

 

Unloader Valves

(Shipping charge of $8.95 will apply on these items if the total order is less than $69.00)

KIT # PUMP MODEL PRICE
1215040200 BXD2020E $112.35add to cart
85.300.207 ZWD4040G, HW3540S $99.50add to cart
AL607EZ HWS5040S $71.35add to cart

 

Pistons

(Shipping charge of $8.95 will apply on these items if the total order is less than $69.00)

KIT # PUMP MODEL PRICE
0202002000 ZWDK4036G, ZWD4040G $70.00add to cart
0202004200 HW3540S, HWS3540S, HWS5040S, TW5050, LWDK Series $76.00add to cart
0202004300 TW8030 $80.00add to cart
0202002200 FWS3530E, FWS4030E $76.00add to cart

Pump Technical Information

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?
Required RPM = Expected capacity X Max RPM allowed
Max allowed capacity
What diameter of pulley must I use to achieve the correct pump RPM?
External diameter of the engine / motor pulley = External diameter of the pump pulley X RPM pump
RPM motor/engine
What if I cannot change the engine / motor pulley?
External diameter of the pump pulley = External diameter engine / motor pulley X RPM engine / motor
Pump RPM
If the engine / motor is running at a lower RPM than the maximum pump RPM allowed, what will be the pump flow capacity?
Attainable maximum capacity - Engine / Motor RPM X Max. capacity indicated on the label
Max RPM indicated on the label
What is the approximate power required to achieve the max. performances allowed?
Required electric motor HP PSI x GPM = Electric Motor HP
1460
Required gas engine HP PSI x GPM X 1.30 = Gas Engine HP
1460

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.

Pump Kits and Accessories

Pump Anti-Freeze

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

Please call to place an order.
Anti-freeze Bottle

Hour Meter

Pressure Washer Hour Meters

Car wash ceiling booms and wall booms are available in different sizes and designs that will fit your application. These booms can rotate 360° rotation for the user. You can add wall boom extensions for a bus or truck wash.

Power Washer Engines

Pressure Washer Engines

Pressure Washer Engines

Briggs & Stratton make the finest engines worldwide for the brands you have come to trust. Look up here all the features, benefits, specifications, and other info.

Pump Care

Car Wash Booms

Helpful Tips to keep your pump in tip-top shape

  • 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.