Comprehensive Package: Each purchase includes 2 thermal relief valves with a 1/4 inch NPT thread size. Designed to activate automatically at 145F, these valves help maintain safe operation of your pressure washer by regulating internal temperatures under pressures 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 in demanding conditions. A smart investment for preserving your pressure washers efficiency.Protective Mechanism: These valves play a critical role in preventing overheating in pressure washers. The built-in seal melts at 145F, releasing hot water and allowing cooler water to enter, which protects the pump and extends 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 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 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 between the color shown in the image and the actual product. Measurement may vary by +/- 1-3 cm.