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 operation of your pressure washer by regulating internal temperatures under pressures up to 200 PSI. Engineered for Durability: Constructed 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 valuable component for preserving the efficiency and longevity of your pressure washer. Protective Mechanism: These valves play a critical role in preventing pressure washer pumps from overheating. The built-in thermal seal melts at 145°F, allowing hot water to discharge and cooler water to enter, effectively protecting the pump and extending its service life. Universal Fit: Compatible with a wide range of pressure washer models, including various brands and series. Designed as a direct replacement for part numbers 678169004, 678169002, 678169001, and 208673, offering broad compatibility across multiple units. Ease of Installation: Featuring a standard 1/4 inch NPT threaded connection, these valves are simple to install and remove, requiring no specialized tools or professional assistance. Ideal for routine maintenance and quick replacements. Color: Gold Material: Brass Package Contents: 2 x Thermal Relief Valve Note: The actual product color may vary slightly due to lighting conditions and display settings. Measurement may vary by +/- 1-3 cm.