O-Rings Parts

86 products available

O-rings seal connections throughout a pressure washer — pump heads, quick-connects, hose fittings, and injector ports — and material matters as much as size. Buna-N (nitrile) is the standard general-purpose material; Viton handles higher temperatures and chemical exposure better, which matters for hot-water units and detergent injection systems.

O-Rings
In Stock

1140450 O-RING MINIMATIC

SKU: 3391

O-ring for pressure washer pumps, fittings, and manifolds. SKU 3391, in stock at CheapPartz.

$0.50
O-Rings
In Stock

12007 O-RING

SKU: 3769

12007 O-RING: O-ring, in stock now at CheapPartz with fast USA shipping.

$0.75
O-Rings
In Stock

12027 O-RING

SKU: 5952

Buy the 12027 O-RING — an O-ring for pressure washer pumps, fittings, and manifolds. Fast USA shipping from CheapPartz.

$0.75
O-Rings
In Stock

1210.0046.00 O-RING

SKU: 3003

1210.0046.00 O-RING: O-ring, in stock now at CheapPartz with fast USA shipping.

$0.71
O-Rings
In Stock

12326 O-RING

SKU: 2540

O-ring for pressure washer pumps, fittings, and manifolds. SKU 2540, in stock at CheapPartz.

$0.75
O-Rings
In Stock

13963 O-RING, 70D

SKU: 4413

O-ring for pressure washer pumps, fittings, and manifolds. SKU 4413, in stock at CheapPartz.

$1.29
O-Rings
In Stock

13969 O-RING 70D MU NBR 7500S, 2DX, 3D

SKU: 5551

13969 O-RING 70D MU NBR 7500S, 2DX, 3D: O-ring, in stock now at CheapPartz with fast USA shipping.

$1.79
O-Rings
In Stock

14048 O-RING, COVER, REAR, C/C, NBR 5DX

SKU: 4256

O-ring for pressure washer pumps, fittings, and manifolds. SKU 4256, in stock at CheapPartz.

$7.20
O-Rings
In Stock

14177 O-RING, FILLER CAP

SKU: 2681

Buy the 14177 O-RING, FILLER CAP — a filler cap for pressure washer pumps and engines. Fast USA shipping from CheapPartz.

$1.79
O-Rings
In Stock

14179 O-RING BUNA-N [2.4 X 20.8]

SKU: 3736

Buy the 14179 O-RING BUNA-N [2.4 X 20.8] — a Buna-N O-ring for pressure washer pumps, fittings, and manifolds. Fast USA shipping from CheapPartz.

$1.79
O-Rings
In Stock

1460430 O-RING

SKU: 4903

Buy the 1460430 O-RING — an O-ring for pressure washer pumps, fittings, and manifolds. Fast USA shipping from CheapPartz.

$0.45
O-Rings
In Stock

17399 O-RING, PLUNGER RETAINER (BUNA-N)

SKU: 2685

Buna-N O-ring for pressure washer pumps, fittings, and manifolds. SKU 2685, in stock at CheapPartz.

$1.79
O-Rings
In Stock

17547 O-RING BUNA-N 2.4x15.3, 85D MU NBR 3CP, 3PFR

SKU: 5751

Buy the 17547 O-RING BUNA-N 2.4x15.3, 85D MU NBR 3CP, 3PFR — a Buna-N O-ring for pressure washer pumps, fittings, and manifolds. Fast USA shipping from…

$2.30
O-Rings
In Stock

17549 O-RING

SKU: 2847

Buy the 17549 O-RING — an O-ring for pressure washer pumps, fittings, and manifolds. Fast USA shipping from CheapPartz.

$2.30
O-Rings
In Stock

17615 O-RING, N-75, VPG, NBR

SKU: 4644

Buy the 17615 O-RING, N-75, VPG, NBR — an O-ring for pressure washer pumps, fittings, and manifolds. Fast USA shipping from CheapPartz.

$2.30
O-Rings
In Stock

1980290 OIL SIGHT GLASS W/O-RING

SKU: 2534

1980290 OIL SIGHT GLASS W/O-RING: fluid level indicator, in stock now at CheapPartz with fast USA shipping.

$5.80
O-Rings
In Stock

23172 O-RING (2.4mm x 22.3mm ID BUNA-N)

SKU: 5153

23172 O-RING (2.4mm x 22.3mm ID BUNA-N): Buna-N O-ring, in stock now at CheapPartz with fast USA shipping.

$1.79
O-Rings
In Stock

25392 O-RING, SLEEVE (BUNA-N)

SKU: 5154

Buy the 25392 O-RING, SLEEVE (BUNA-N) — a Buna-N O-ring for pressure washer pumps, fittings, and manifolds. Fast USA shipping from CheapPartz.

$1.29
O-Rings
In Stock

26969 O-RING

SKU: 5965

26969 O-RING: O-ring, in stock now at CheapPartz with fast USA shipping.

$1.29
O-Rings
In Stock

2840890 O-RING INLET & OUTLET RMW PUMP

SKU: 1791

Buy the 2840890 O-RING INLET & OUTLET RMW PUMP — an O-ring for pressure washer pumps, fittings, and manifolds. Fast USA shipping from CheapPartz.

$0.38
O-Rings
In Stock

390080 O-RING MINIMATIC

SKU: 3668

390080 O-RING MINIMATIC: O-ring, in stock now at CheapPartz with fast USA shipping.

$0.39
O-Rings
In Stock

394280 O-RING

SKU: 3896

394280 O-RING: O-ring, in stock now at CheapPartz with fast USA shipping.

$0.50
O-Rings
In Stock

43781 O-RING, (BUNA-N)

SKU: 5162

Buna-N O-ring for pressure washer pumps, fittings, and manifolds. SKU 5162, in stock at CheapPartz.

$2.30
O-Rings
In Stock

48787 CAP, FILLER, W/O-RING, C/C 6DX

SKU: 1961

48787 CAP, FILLER, W/O-RING, C/C 6DX: O-ring, in stock now at CheapPartz with fast USA shipping.

$15.32
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O-Rings Buying Guide

Size and durometer both matter

Two o-rings can share the same outer dimension but use different cross-section thickness or hardness (durometer) — matching your pump or fitting manufacturer's exact part spec avoids a seal that looks right but leaks under pressure.

Buna-N vs. Viton

Buna-N is the cost-effective default for cold and ambient-temperature water systems. Viton costs more but resists heat and chemical degradation far better, which is why it's the standard choice for hot-water pressure washers and chemical injector seals.

O-Rings FAQ

Can I substitute a similar-size o-ring if I don't have the exact part number?

It will often seal temporarily, but a mismatched cross-section or durometer wears faster and is more likely to extrude or leak under pressure cycling. For anything on the pressure side of the pump, match the exact spec.

Manufacturer references