Pumps & Plumbing
Find the right replacement pump for your pressure washer—triplex or axial, direct- or belt-drive—and learn how to match PSI, GPM, RPM, and shaft size for a reliable fit.
This Pumps & Plumbing category includes rebuildable triplex pumps, axial units, and pump packages with the plumbing components pros depend on.
Featured Categories
-
General Pump T9281 Solid Shaft Pressure Washer Pump
$1,347.97
As low as $33.70/mo -
Comet TW 3570 S Solid Shaft Pressure Washer Pump
$1,099.00
As low as $27.48/mo -
Comet TW 5550 S Solid Shaft Pressure Washer Pump
$2,332.97
As low as $58.32/mo -
Comet TW 8036 S Solid Shaft Pressure Washer Pump
$1,938.47
As low as $48.46/mo -
Comet TW 7036 S Solid Shaft Pressure Washer Pump
$1,314.97
As low as $32.87/mo -
Comet TW 4070 S Solid Shaft Pressure Washer Pump
$1,918.47
As low as $47.96/mo -
Comet TW 5070 S Solid Shaft Pressure Washer Pump
$2,088.47
As low as $52.21/mo -
Comet TWS 7040 S Solid Shaft Pressure Washer Pump
$1,599.97
As low as $40.00/mo -
Comet TWS 10030 S Pressure Washer Pump 1750 RPM 10.7 GPM 3000 PSI
$1,999.97
As low as $50.00/mo -
-
Comet TWS 10025 S Solid Shaft Pressure Washer Pump
$1,357.97
As low as $33.95/mo -
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 -
-
-
Legacy TTV-3563 Solid Shaft Pressure Washer Pump
$1,142.47
As low as $28.56/mo -
-
Comet TW 10025 S Solid Shaft Pressure Washer Pump
$1,584.47
As low as $39.61/mo -
-
Comet TWN 6036 S Solid Shaft Pressure Washer Pump
$1,530.97
As low as $38.27/mo
Pumps & Plumbing FAQ's
Built‑in vs. external unloader: which should I choose?
Built‑in unloaders simplify installation on compact units. External unloaders with bypass to tank make heat management and service easier on professional rigs.
Can I run hot water through a cold‑water pump?
Only if the pump is specifically rated for the higher inlet temperature and equipped with the correct seals. Check the data plate and seal kit specifications.
What causes pump cavitation and how do I prevent it?
Cavitation comes from inadequate inlet water or restriction. Use a larger‑ID inlet hose, keep runs short and straight, clean the inlet filter, and avoid air leaks on fittings.
Do I need a thermal relief valve?
Yes. In bypass, water heats quickly and can damage seals. A thermal relief valve purges hot water to protect the pump, especially on units that idle frequently.
Can I increase PSI by swapping the pump?
Only if every component—engine/motor power, hoses, gun, unloader, and fittings—is rated for the higher pressure. Otherwise, stay with your current PSI and size the nozzle appropriately.
Triplex vs. axial: what’s the difference?
Triplex plunger pumps are rebuildable and built for frequent use with steadier pressure. Axial pumps are compact and cost‑effective but usually offer fewer service options and a shorter service life.
How do I match a replacement pump to my engine or motor?
Confirm pump RPM and drive style, then match shaft type/size and bolt pattern. Keep GPM/PSI close to the original unless the power source and accessories are rated for more. Verify rotation and unloader style before ordering.
