Comprehensive Package: Each purchase includes 2 thermal relief valves, each 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 under demanding conditions. 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 built-in seal melts at 145°F, allowing hot water to discharge and cool water to enter, thereby protecting the pump and extending its service life. Universal Fit: Compatible with various pressure washer models, including but not limited to multiple brands and series. Direct replacement for part numbers 678169004, 678169002, 678169001, and 208673, offering broad compatibility across numerous 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 or removal, 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.