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 operation of your pressure washer by regulating internal temperatures up to 200 PSI.Engineered for Durability: Made from high-quality brass, these thermal relief valves offer excellent resistance to oil and corrosion, ensuring long-lasting and reliable performance under demanding conditions. A valuable addition 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, helping prevent damage to the pump and extending its service life.Universal Fit: Compatible with various pressure washer models, including brands such as Simpson, AR Blue Clean, Generac, and others. 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 expertise. The 1/4 inch NPT threaded connection allows for quick and secure attachment, making maintenance easy 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 in color between the product image and the actual item. Measurement may vary by +/- 1-3 cm.