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: Made from high-quality brass, these thermal relief valves provide excellent resistance to oil and corrosion, ensuring long-lasting and reliable performance in demanding environments. An essential component for maintaining pressure washer efficiency. Protective Mechanism: These valves play a critical role in preventing pressure washer overheating. The built-in seal melts at 145°F, allowing hot water to discharge and cool water to enter, protecting the pump and extending its service life. Universal Fit: Compatible with various pressure washer models, serving as direct replacements for part numbers 678169004, 678169002, 678169001, and 208673. Offers broad compatibility across multiple brands and units. Ease of Installation: Designed for simple installation without 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 display settings may cause slight variations between the product color in images and the actual item. Measurement may vary by +/- 1-3 cm.