V171 Spring Flow Balance - DeWalt
The DeWalt / DeVilbiss V171 Spring Flow Balance is a genuine OEM replacement spring used within the pump assemblies of compatible pressure washers. Manufacturer parts documentation identifies V171 as “SPRING FLOW BALANCE.” The part is used in the flow-balance/check-valve area of applicable CAT pump assemblies and was carried across multiple generations of DeWalt and DeVilbiss pressure washer pump designs.
Product Specifications
Part Number: V171
Part Type: Flow Balance Spring
Manufacturer: DeWalt / DeVilbiss
Manufacturer Description: SPRING FLOW BALANCE
Application: Pressure Washer Pump Assembly
Quantity Used: 1 per applicable assembly
Condition: Genuine OEM Replacement Part
Tool Compatibility
V171 is documented for compatible DeWalt pressure washer configurations including:
DeWalt DP2800 – Type 1
DeWalt DP3100 – Type 2
DeWalt DP3100IC – Type 2
DeWalt DPD3000IC – Type 1
DeWalt DPD3100IC – Type 1
DeWalt DPD3300 – Type 1
V171 is also documented for additional legacy pressure washers, including Black & Decker / DeVilbiss BDP2600, DeVilbiss PCH2600C, Porter-Cable PCH2800C, and other applicable DeVilbiss pressure washer models.
Part Function
The V171 Spring Flow Balance is an internal spring used in the flow-balance/check-valve section of applicable pressure washer pump assemblies. In documented CAT pump configurations, the spring works with the associated flow-balancer and valve components as part of the pump's internal fluid-control arrangement.
Important Compatibility Information
V171 was used across more than one generation of pressure washer pump assemblies. For example, the DeWalt DP2800 Type 1 uses V171 with earlier 5140030-series pump components, while the DP3100 Type 2 and related models use the same V171 spring with later 5140043-series components.
Because the surrounding pump components can differ substantially between models, the use of V171 does not mean that other unloader, valve, piston, or sealing components are interchangeable between these pressure washers. Verify the exact model, type, and pump breakdown before ordering related parts.
Related Pump Components
V170: Flow Balancer
V148 / CAT 46254: Valve Seat
P599 / CAT 13963: O-Ring
5140030-04: Check Valve
Related components are sold separately unless specifically stated otherwise.
| On Offer | No |
|---|---|
| Buy Together | No |
| Ship Free | No |

