Pumps Parts
246 products available
The pump is the heart of a pressure washer, and replacement/rebuild parts here are compatible with the major triplex plunger pumps used across residential and commercial machines — Annovi Reverberi (AR), Cat Pumps, General Pump, and Comet, plus the pumps built into Hotsy and Mi-T-M units. Every pump is rated for a specific GPM (flow) and PSI (pressure); parts sized for one rating won't seat or seal correctly on a different one, even within the same brand.
(10)2SF30ES 3.0GPM 1500 PSI 3450 RPM 5/8" ELECTRIC
SKU: 3589
(10)2SF30ES 3.0GPM 1500 PSI 3450 RPM 5/8" ELECTRIC is a pressure washer pump that delivers 3.0 GPM at up to 1500 PSI. SKU 3589.
(10)2SFX20ES 2GPM 2000 PSI 3450 RPM 5/8" ELECTRIC
SKU: 3743
(10)2SFX20ES 2GPM 2000 PSI 3450 RPM 5/8" ELECTRIC is a pressure washer pump that delivers 2 GPM at up to 2000 PSI. SKU 3743.
(10)4SPX32G1I 3.2GPM 3000PSI 1" GAS UNL/INJ
SKU: 6417
(10)4SPX32G1I 3.2GPM 3000PSI 1" GAS UNL/INJ is a pressure washer pump that delivers 3.2 GPM at up to 3000 PSI. SKU 6417.
(10)66DX40GG1 4 GPM 4000 PSI 1" GAS SHAFT
SKU: 6403
(10)66DX40GG1 4 GPM 4000 PSI 1" GAS SHAFT: shaft (rated up to 4000 PSI, 4 GPM flow, 1" size), in stock now at CheapPartz with fast USA shipping.
(30)SUTTNER ST-36 SLUDGE PUMP ONLY
SKU: 2395
(30)SUTTNER ST-36 SLUDGE PUMP ONLY is a sludge pump (ST-36), built to move dirty, debris-laden water where a standard pressure washer pump would clog. SKU 2395.
(6)8000-443-236 SHURFLO 1.8GPM 60PSI 12V
SKU: 3095
(6)8000-443-236 SHURFLO 1.8GPM 60PSI 12V is a diaphragm pump moving 1.8 GPM at 60 PSI. SKU 3095.
(6)8000-543-238 SHURFLO 1.6GPM 100PSI 12V
SKU: 6751
(6)8000-543-238 SHURFLO 1.6GPM 100PSI 12V is a diaphragm pump moving 1.6 GPM at 100 PSI. SKU 6751.
(6)8000-813-238 SHURFLO 1.6GPM 100PSI 115V
SKU: 6203
(6)8000-813-238 SHURFLO 1.6GPM 100PSI 115V is a diaphragm pump moving 1.6 GPM at 100 PSI. SKU 6203.
(6)8005-233-236 SF 1.4GPM 60PSI115V
SKU: 3096
(6)8005-233-236 SF 1.4GPM 60PSI115V is a diaphragm pump moving 1.4 GPM. SKU 3096.
(8)PMR EZ4040G-VRT3-310EZ W/THERMAL RELIEF
SKU: 6163
(8)PMR EZ4040G-VRT3-310EZ W/THERMAL RELIEF is a pressure washer pump (model EZ4040G-VRT3-310EZ) supplied as a pump-and-unloader combo, fitted with VRT3-310EZ un
**A2VA-7116 SUNTEC FUEL PUMP ORDER EAST ONLY***
SKU: 1437
**A2VA-7116 SUNTEC FUEL PUMP ORDER EAST ONLY*** is a fuel pump for oil-burner applications (model A2VA-7116) — it meters fuel oil to the burner nozzle; it does
1050 15PFR PUMP 10GPM 2200PSI 958RPM
SKU: 5715
1050 15PFR PUMP 10GPM 2200PSI 958RPM is a pressure washer pump (model 1050 15PFR) that delivers 10 GPM at up to 2200 PSI. SKU 5715.
120V 30A 1.89" FP SINGLE HOLE MT OFF-PUMP-BURNER K
SKU: 2254
120V 30A 1.89" FP SINGLE HOLE MT OFF-PUMP-BURNER K is an oil-burner kit for hot-water pressure washers. SKU 2254.
2184402U/PF20372U CLEANCUT 12V FUEL PUMP
SKU: 6588
2184402U/PF20372U CLEANCUT 12V FUEL PUMP is a fuel pump for oil-burner applications (model 2184402U/PF20372U) — it meters fuel oil to the burner nozzle; it does
2184403U/PF20332U CLEANCUT 240V FUEL PUMP
SKU: 6564
2184403U/PF20332U CLEANCUT 240V FUEL PUMP is a fuel pump for oil-burner applications (model 2184403U/PF20332U) — it meters fuel oil to the burner nozzle; it doe
2184404U/PF20322U CLEANCUT 120V FUEL PUMP
SKU: 6591
2184404U/PF20322U CLEANCUT 120V FUEL PUMP is a fuel pump for oil-burner applications (model 2184404U/PF20322U) — it meters fuel oil to the burner nozzle; it doe
240V 30A 1.89" FP SINGLE HOLE MT. OFF-PUMP-BURNER
SKU: 2256
240V 30A 1.89" FP SINGLE HOLE MT. SKU 2256.
240V 40A 2.52" FP SINGLE HOLE MT. OFF-PUMP-BURNER
SKU: 4633
240V 40A 2.52" FP SINGLE HOLE MT. SKU 4633.
270 PUMP 3.5GPM 1500PSI 1420RPM 16.5mm
SKU: 2612
270 PUMP 3.5GPM 1500PSI 1420RPM 16.5mm is a pressure washer pump (model 270) that delivers 3.5 GPM at up to 1500 PSI. SKU 2612.
280 PISTON PUMP 3.0GPM 1000PSI 133ORPM 16.5mm
SKU: 4467
Buy the 280 PISTON PUMP 3.0GPM 1000PSI 133ORPM 16.5mm — a piston for triplex and plunger pressure washer pumps. Fast USA shipping from CheapPartz.
2840250 SUCTION EXTENSION RMW PUMP
SKU: 1715
2840250 SUCTION EXTENSION RMW PUMP is a extension for pressure washer pumps. SKU 1715.
2840260 OUTLET EXTENSION RMW PUMP
SKU: 1735
2840260 OUTLET EXTENSION RMW PUMP is a extension for pressure washer pumps. SKU 1735.
Pumps Buying Guide
Find your model before you order
Your pump's data plate — usually stamped on the pump head or a sticker near the belt guard — lists the brand, model number, GPM, and PSI. Every part search should start from that model number, not a generic search for "pump seal kit."
Direct-drive vs. belt/gear-drive
Direct-drive pumps mount straight to the engine or motor shaft and are common on consumer and mid-range commercial units. Belt- and gear-driven pumps run at a different RPM than the engine and are typical on higher-flow commercial rigs — confirm which style you have before ordering a rebuild kit, since seal and bearing kits differ between them.
OEM vs. aftermarket
Quality aftermarket seal kits, valves, and unloaders from reputable manufacturers typically cost 30–50% less than the same part sourced through a dealer counter, because dealer pricing includes distributor and counter markup on top of the manufacturer's price. The exception is precision-machined pump heads and crankcases, where OEM or a well-reviewed direct equivalent is worth the extra cost — tolerances matter more on parts that hold pressure than on wear items like seals and o-rings.
Pumps FAQ
How do I know if I need a new pump or just a rebuild kit?
If the pump head and crankcase aren't cracked and the plunger bores aren't scored, a seal/valve rebuild kit almost always restores full performance at a fraction of a replacement pump's cost. Scoring, cracking, or a pump that won't hold pressure even after new seals and valves usually means it's time to replace the pump.
What are the signs a pump is failing?
Milky or cloudy oil (water in the crankcase), oil leaking past the plunger, pressure that won't build or holds unevenly, and knocking or grinding from the pump head are the most common early warning signs.
How often should I change pump oil?
Most triplex pump manufacturers recommend the first change after 50 hours, then every 500 hours or annually, whichever comes first — check your specific pump's manual since intervals vary by model.