Comprehensive Package: Each purchase includes 2 thermal relief valves, each featuring a 1/4-inch NPT thread size. Designed to activate automatically at 145°F, these valves regulate internal temperatures up to 200 PSI. Engineered for Durability: Made from high-quality brass, these thermal relief valves offer excellent resistance to oil and corrosion, ensuring consistent and reliable performance under demanding conditions. Protective Mechanism: These valves protect equipment from overheating. The built-in fusible seal melts at 145°F, allowing hot water to discharge and cooler water to enter, helping safeguard the system and extend its service life. Universal Fit: Compatible with various models and systems. Direct replacements for part numbers 678169004, 678169002, 678169001, and 208673. Ease of Installation: Features a threaded 1/4-inch NPT connection for simple, tool-free installation or replacement—ideal for routine maintenance. Color: Gold Material: Brass Package Contents: 2 x Thermal Relief Valve Note: Color appearance may vary slightly due to lighting and screen settings. Measurement tolerance: ±1–3 cm.