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 operating temperatures and regulate internal pressure up to 200 PSI. Engineered for Durability: Made from solid brass, these thermal relief valves provide excellent resistance to oil and corrosion, ensuring consistent and reliable performance under demanding conditions. A valuable addition for maintaining pressure washer efficiency. Protective Mechanism: These valves protect pressure washers from overheating. The built-in thermal seal melts at 145°F, allowing hot water to discharge and cooler water to enter, thereby protecting the pump and extending its service life. Universal Fit: Compatible with a wide range of pressure washers. Direct replacements for part numbers 678169004, 678169002, 678169001, and 208673. Ease of Installation: Features a threaded 1/4-inch NPT connection for straightforward installation without professional assistance—ideal for routine maintenance. Color: Gold Material: Brass Package Contents: 2 × Thermal Relief Valve Note: Color appearance may vary slightly due to lighting and screen settings. Measurement tolerance is ±1–3 cm.