Watts F121465 Relief Valve

The Watts F121465 LF174A 50 FS is a 3/4-inch lead-free pressure relief valve designed for boiler, hydronic heating, and hot water system protection. Rated at 50 PSI, this valve helps prevent excessive pressure buildup that can damage boilers, piping, storage tanks, and connected HVAC equipment.

In residential and commercial hydronic systems, pressure relief valves are critical safety components that automatically discharge excess pressure to maintain safe operating conditions. This model also includes a flood sensor configuration that helps monitor discharge or leakage conditions near the relief outlet for additional system protection.

Technicians commonly install the LF174A 50 FS in closed-loop heating systems, commercial boiler assemblies, and mechanical room applications where dependable overpressure protection is required.

Key benefits:

• 50 PSI pressure protection for hydronic and boiler systems
• Lead-free construction for potable water applications
• Helps protect boilers and piping from excessive pressure
• Integrated flood sensor supports leak and discharge monitoring
• Suitable for residential and commercial HVAC installations

Common questions:
What does this valve do? It relieves excess pressure to help protect the system from damage.
What is the flood sensor used for? It helps detect discharge or leakage events near the valve outlet.
Where is this valve commonly installed? On boilers, hydronic heating systems, and hot water applications.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.

F121465 is the cross for 0121465