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 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 in pressure washers. The integrated seal melts at 145°F, releasing hot water and allowing cooler water to enter, which protects the pump and extends its operational 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 enables quick and secure attachment, making maintenance straightforward and efficient. Color: Gold Material: Brass Package Contents: 2 x Thermal Relief Valve Note: Light reflection and display settings may cause slight variations between the color shown in the image and the actual product. Measurement may vary by +/- 1-3 cm.