Pumps
Find the right replacement pressure washer pump by matching flow, pressure, drive type, and shaft size to your machine.
This guide explains common pump types, mounting options, and key checks so you can buy with confidence and avoid fitment issues.
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Comet TWS 13020 S Solid Shaft Pressure Washer Pump
$1,894.47
As low as $47.36/mo -
Comet TW 5570 S Solid Shaft Pressure Washer Pump
$1,099.00
As low as $27.48/mo -
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Legacy TTV-3563 Solid Shaft Pressure Washer Pump
$1,142.47
As low as $28.56/mo -
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Comet TW 10025 S Solid Shaft Pressure Washer Pump
$1,584.47
As low as $39.61/mo -
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Comet TWN 6036 S Solid Shaft Pressure Washer Pump
$1,530.97
As low as $38.27/mo -
Comet TWN 8025 S Solid Shaft Pressure Washer Pump
$3,147.97
As low as $78.70/mo -
Comet TWN 7025 S Solid Shaft Pressure Washer Pump
$1,318.97
As low as $32.97/mo -
Legacy GM6035R Solid Shaft Pressure Washer Pump
$1,057.47
As low as $26.44/mo -
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Comet FWS2 4540 S Solid Shaft Pressure Washer Pump
$1,223.47
As low as $30.59/mo -
Pumps FAQ's
Do I need a buffer tank?
A buffer tank helps when supply is inconsistent, hose runs are long, or high GPM pumps are used. It stabilizes inlet conditions and helps prevent cavitation.
Why is my pump noisy or losing pressure after install?
Common causes are inlet starvation, air leaks on the suction side, incorrect unloader setup, or mismatched RPM. Check feed plumbing, filter, fittings, and unloader settings.
Can I increase PSI or GPM with a new pump?
Only within the power source’s capability. Higher pressure or flow may require more horsepower, different gearing, or upgraded accessories.
How do I determine shaft compatibility?
Measure the engine or motor shaft and match it to the pump (e.g., 3/4″ or 1″ hollow, 24 mm solid, or 5/8″ hollow for NEMA 56C). Confirm the flange pattern and rotation clearance.
How do I choose between belt-drive and direct-drive?
Direct-drive is compact and cost-effective. Belt-drive reduces pump RPM and vibration, which many users prefer for longer run times or fixed installations.
What’s the difference between wobble, axial, and triplex pumps?
Wobble and axial pumps are compact designs suited to lighter duty. Triplex plunger pumps are built for frequent use and are fully serviceable with replaceable seals and valves.
