Watts 0121491 1″ LF174A Lead-Free 60 PSI Relief Valve 1,702,000 BTU

Description

The Watts LF174A (SKU 0121491) is a 1-inch lead-free pressure relief valve engineered for dependable overpressure protection in residential and light commercial hydronic heating systems. With a factory-set relief pressure of 60 PSI and a rated capacity of 1,702,000 BTU/hr, this valve is sized to handle demanding boiler applications while maintaining safe system operating conditions.

The “LF” designation confirms lead-free brass construction, meeting the requirements of NSF/ANSI 61 and applicable low-lead legislation for potable and heating system use. The LF174A series is a trusted Watts solution for boiler safety, providing fast, automatic pressure relief whenever system pressure exceeds the set point — helping protect equipment, piping, and occupants.

Key Features

• 1-inch connection size for straightforward installation on standard boiler tapping
• 60 PSI factory-set relief pressure
• 1,702,000 BTU/hr rated capacity
• Lead-free brass body construction — compliant with low-lead regulations
• Automatic pressure relief to protect hydronic heating systems
• Designed for residential and light commercial boiler applications

Specifications

• SKU: 0121491
• Model: LF174A
• Connection Size: 1 inch
• Set Pressure: 60 PSI
• BTU Capacity: 1,702,000 BTU/hr
• Body Material: Lead-Free Brass
• Brand: Watts

Application

Ideal for use on hot water boilers, hydronic heating systems, and related plumbing assemblies where code-compliant, lead-free overpressure protection is required. Always verify that the valve’s set pressure and BTU rating match your system’s specifications before installation.