Comprehensive Package: Each purchase includes 2 thermal relief valves with a 1/4 inch NPT thread size. Designed to activate automatically at 145°F, these valves help maintain safe operating conditions by regulating internal temperatures up to 200 PSI. Engineered for Durability: Made from high-quality brass, these thermal relief valves provide excellent resistance to oil and corrosion, ensuring long-lasting and reliable performance in demanding environments. A key component for preserving pressure washer efficiency. Protective Mechanism: These valves play a critical role in preventing overheating. The built-in seal melts at 145°F, allowing hot water to discharge and cool water to enter, protecting the pump and extending its service life. Universal Fit: Compatible with a wide range of pressure washers. Serves as a direct replacement for part numbers 678169004, 678169002, 678169001, and 208673, offering broad model compatibility. Ease of Installation: Designed for simple installation without the need for professional tools or assistance. The 1/4 inch NPT threaded connection allows for quick and secure attachment, making maintenance convenient. Color: Gold Material: Brass Package Contents: 2 x Thermal Relief Valve Note: Light reflection and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.