Description
The Watts LF174A (SKU: F121549) is a 1.5-inch lead-free pressure relief valve engineered to deliver dependable overpressure protection in residential and commercial boiler and hydronic heating systems. Rated at 150 PSI with a capacity of 7,630,000 BTU/hr, this valve is built to handle high-demand applications where system safety and code compliance are critical.
Constructed with a lead-free brass body in compliance with low-lead content requirements, the LF174A is suitable for potable water and hydronic applications where material safety standards must be met. The valve automatically opens to relieve excess pressure when system pressure exceeds the set point, protecting boilers, heat exchangers, and associated piping from potentially dangerous overpressure conditions.
Key Features
- 1.5-inch connection size for high-flow, high-capacity installations
- 150 PSI pressure relief set point
- 7,630,000 BTU/hr rated capacity
- Lead-free brass body construction for compliance with low-lead regulations
- Designed for boiler and hydronic heating system overpressure protection
- Automatic pressure relief operation — no external power required
- Suitable for residential and commercial hydronic heating applications
Specifications
- Brand: Watts
- Model: LF174A
- SKU: F121549
- Connection Size: 1.5 inches
- Set Pressure: 150 PSI
- Capacity: 7,630,000 BTU/hr
- Body Material: Lead-Free Brass
- Application: Boiler & Hydronic Heating Systems
Why Choose the Watts LF174A?
Watts is a globally recognized leader in flow control and water quality products. The LF174A series is a trusted choice among HVAC professionals for its robust construction, accurate pressure relief performance, and compliance with lead-free material standards. Whether you’re servicing an existing boiler system or specifying components for a new hydronic installation, the LF174A delivers the safety and reliability your system demands.
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