F179 O-ring 1/4 Qc - - DeWalt

The DeWalt F179 O-Ring is a genuine OEM replacement seal used in 1/4“ quick-connect fittings on compatible DeWalt and legacy pressure washers. Manufacturer parts documentation identifies F179 as ”ORING 1/4 QC.“ Depending on the pressure washer configuration, the O-ring may be used at the spray gun, lance, or other 1/4” quick-connect interface.

Product Specifications

Part Number: F179
Part Type: Quick-Connect O-Ring
Manufacturer: DeWalt / DeVilbiss
Manufacturer Description: ORING 1/4 QC
Quick-Connect Size: 1/4“
Application: Pressure Washer 1/4” Quick-Connect Fittings
Condition: Genuine OEM Replacement Part

Tool Compatibility

DeWalt F179 is documented for numerous pressure washer configurations, including:

DeWalt DP65 – Type 1
DeWalt DP2800A – Type 2
DeWalt DP3100 – Type 2
DeWalt DP3100IC – Type 2
DeWalt DP3400 – Type 1
DeWalt D3500K – Applicable configurations
DeWalt DP3700 – Type 2
DeWalt DP3750 – Type 1
DeWalt DPD3300 – Type 1
DeWalt DPH3100 – Type 1
DeWalt DPH3800 – Type 1

F179 is also documented on numerous legacy DeVilbiss and Porter-Cable pressure washers. Verify the complete equipment model and type number against the applicable parts diagram before ordering.

Part Function

The F179 O-ring provides the seal inside compatible 1/4“ pressure washer quick-connect fittings. When the mating fitting is connected, the O-ring seals around the connection to help prevent pressurized water from escaping at the joint.

When to Replace

Inspect the O-ring if a compatible 1/4” quick-connect fitting leaks at the connection. Replace F179 if the original O-ring is cut, cracked, flattened, torn, hardened, missing, or otherwise damaged. A leaking connection can also result from damage or wear to the mating fittings, so the O-ring should not be assumed to be the cause of every quick-connect leak.

Important Compatibility Information

F179 is specifically identified as the 1/4" quick-connect O-ring. Do not confuse it with larger O-rings used elsewhere in the pressure washer's high-pressure system. Match the replacement using part number F179 and the applicable equipment parts diagram.