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: Constructed from high-quality brass, these thermal relief valves offer excellent resistance to oil and corrosion, ensuring long-lasting and reliable performance in demanding environments. An essential component for maintaining your pressure washer’s efficiency. Protective Mechanism: These valves play a critical role in protecting pressure washers from overheating. The integrated seal melts at 145°F, allowing hot water to discharge and cool water to enter, effectively safeguarding the pump and extending its service life. Universal Fit: Compatible with a wide range of pressure washer models, including various brands. Direct replacement for part numbers 678169004, 678169002, 678169001, and 208673, offering broad compatibility across multiple units. 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 and efficient. Color: Gold Material: Brass Package Contents: 2 x Thermal Relief Valve Note: Light reflection and differences in display screens may cause slight variations between the color shown in the image and the actual product. Measurement may vary by +/- 1-3 cm.