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 operation by regulating 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 long-lasting and reliable performance in demanding conditions. A valuable addition for maintaining system efficiency. Protective Mechanism: These valves play a crucial role in protecting systems from overheating. The built-in seal melts at 145°F, releasing hot water and allowing cooler water to enter, helping prevent damage and extending equipment life. Universal Fit: Compatible with various systems including water heaters, pumps, and more. Direct replacement for part numbers 678169004, 678169002, 678169001, and 208673, offering broad compatibility across multiple models. Ease of Installation: Designed for simple installation without the need for 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 different display settings may cause slight variations in color compared to the actual item. Measurement may vary by +/- 1-3 cm.