Description
Overview:
This safety valve is a Genuine Stihl part for backpack sprayers, designed to regulate and release excess pressure to protect your equipment. It is engineered for the Stihl SG 51 and SG 71, restoring safe operating pressure when the original valve is worn, clogged, or leaking. The valve features a durable polymer body with an internal spring-loaded mechanism and sealing components suited to typical spraying tasks. By venting overpressure, it helps prevent stress on the tank, pump, and seals, supporting consistent spray performance and longer service life. It is a direct replacement part and matches the original specification for fit and function. Manufacturer Part Number: 4255 510 0903 (also supplied as 4255-510-0903 and 42555100903). Genuine Stihl Part.
Key Features:
- Genuine Stihl replacement for correct fit and pressure control on SG 51 and SG 71
- Robust polymer construction with spring-loaded mechanism for reliable venting
- Helps prevent overpressure damage to tank, pump, seals, and hose connections
- Consistent performance to maintain even spray output and reduce downtime
- Chemically resistant materials suitable for common garden and site spraying liquids
- Direct swap for the original valve with no modifications required
- Compact, low-weight component for easy handling during maintenance
- OEM specification for compatibility and long service life
Typical Applications:
Use on Stihl backpack sprayers to maintain safe operating pressure during application of water, cleaning solutions, and typical garden or site chemicals. Ideal when restoring a sprayer after pressure creep, erratic spray, or venting issues. Suitable for routine maintenance to keep equipment running smoothly across landscaping, grounds maintenance, agriculture, and construction site hygiene tasks.
Also known as:
Pressure relief valve, overpressure valve, pressure release valve, pressure vent, safety breather, PRV, pressure safety vent, relief plug.
Fits Models:
SG 51, SG 71
Alternate Part Numbers:
4255-510-0903, 42555100903
Product Specifications
| L&S Part No. | 4255 510 0903 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 42555100903 |
| Unit of Sale | 1 |
| Applications | SG 51, SG 71, SG51, SG71 |
| Fits Brands | Stihl |
| Fits Models | SG 51, SG 71 |
