The Yellow rings are 14 mm. Used for the high pressure hose M 22 screw on connectors.
The Green rings are 1/4 in. Used for the Quick connect fitting on the spray tips and wand to gun connection.
The Blue rings are 3/8 in. They fit on the high pressure hose quick connect fittings.
The Red rings are 15 mm. Not really sure where the go.
The black one with the screen goes on the pump inlet where your garden hose hooks up. It filters out the large debris and seals the connection.
NorthStar Pressure Washer O-Ring Kit with 1/4in. and 3/8in. Coupler

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Shipping:
Available now
$19.99 Same DayStore Pickup:
8 in stock at Fredericksburg VA - Pickup in under 1 hr
- Prevents Leaks: Helps maintain a secure seal in pressure washer connections
- 1/4in. Quick-Connect Coupler: Includes black O-rings for quick-connect fittings
- 3/8in. Quick-Connect Coupler: Includes black O-rings for larger quick-connect fittings
- M22 Coupler: Includes standard black 14mm O-rings and special-sized red 15mm O-rings
- Garden Hose Connector: Includes black filter washer for added protection
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Description
Key Specs
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Q & A
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Product Summary
What's Included
- (1) NorthStar Pressure Washer O-Ring Kit
Features + Benefits
- Prevents Leaks: Helps maintain a secure seal in pressure washer connections
- 1/4in. Quick-Connect Coupler: Includes black O-rings for quick-connect fittings
- 3/8in. Quick-Connect Coupler: Includes black O-rings for larger quick-connect fittings
- M22 Coupler: Includes standard black 14mm O-rings and special-sized red 15mm O-rings
- Garden Hose Connector: Includes black filter washer for added protection
Key Specs
| Attribute | Specification |
|---|---|
item# | 43398 |
Brand | NorthStar |
Ship Weight | 0.04 LB |
Inlet | 0 |
Included (qty.) | 10 |
| Attribute | Specification |
|---|---|
Product Type | Couplers |
Quick Connect | No |
Material | Rubber |
Fuel Type | Other |
Reviews
Questions & Answers
Questions
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· 14 years ago
What are these used for in the pump
Where are these used in the pump?
Are they for the seal between the pump and water, so that the water does not get into the pump?-
noneofyobiness· 13 years ago
Helpful?
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ProductExpert10· 14 years ago
O rings are used to create a seal between the pump and water to ensure water does not leak into the pump.
Helpful?
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· 9 months ago
What are the sizes of the o rings. Inside diameter Outside diameter Cross-sectional diameter
1 answer-
NorthstarExpert12· 9 months ago
The two filters have a 25mm OD, 16mm and 13mm CSD (cross-sectional diameter).
There are three black O-rings sizes. Two have a 20.6mm OD, 15.8mm ID and 2.4mm CSD. Two have a 17.1mm OD, 11.8mm ID and a 2.65mm CSD. Two have a 14.43mm OD, 9.19mm ID and 2.62mm CSD.
The two brown O-rings have a 14mm OD, 9mm ID and 2.5mm CSD.
Helpful?
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· 2 years ago
What material are these made of?
1 answer-
NorthstarExpert11· 2 years ago
The O rings are made of EPDM (ethylene propylene diene monomer). The filter is stainless steel.
Helpful?
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· 4 years ago
ARE THESE O RINGS HIGH TEMP
1 answer-
productexpert6· 4 years ago
The O-Ring kit would be rated to a maximum temperature of 140 degrees F.
Helpful?
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· 8 years ago
Viton?
Are these o-ring Viton for chemical use?
1 answer-
NorthstarExpert13· 8 years ago
This O-ring kit is designed to replace common O-rings for pressure washer fittings and not for chemical use.
Helpful?
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· 15 years ago
Is there a particular o ring that is better to use for hot water?
1 answer-
ProductExpert5· 15 years ago
This General Pump pressure washer pump O-Ring kit is rated for up to 250 degrees, and will work on hot water pressure washers.
Helpful?
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Estimated to ship 07/17/26Store Pickup:
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Estimated to ship 07/09/26
$19.99 Same DayStore Pickup:
1 in stock at Fredericksburg VA - Pickup in under 1 hr
Item # 43493
$19.99Shipping:
Backordered: Order now to reserve yours -
Estimated to ship 07/09/26
$19.99 Same DayStore Pickup:
3 in stock at Fredericksburg VA - Pickup in under 1 hr
Specifications
0
1/4
1/4
3/8
10
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1
Couplers
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Couplers
No
No
Yes
Yes
Rubber
Steel
Multiple
Stainless Steel
Other
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4,000
4,500
5,000
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1/4
3/8
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F-F
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250 °F
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