Description
The Watts F121508 is a 1-inch lead-free (LF) pressure reducing valve from the trusted LF174A series, engineered to automatically reduce high incoming water pressure to a safe, consistent downstream level. Designed for residential and light commercial plumbing and hydronic systems, this full-size valve helps protect piping, fixtures, and equipment from the damaging effects of excessive water pressure.
Key Features
- Lead-free (LF) construction — compliant with NSF/ANSI 61 and NSF/ANSI 372 low-lead requirements
- 1-inch pipe size for standard residential and commercial installations
- 150 PSI inlet pressure rating for high-pressure supply lines
- Full-size (FS) design provides maximum flow capacity with minimal pressure drop
- Factory-set outlet pressure with field-adjustable spring mechanism
- Durable brass body construction for long service life
- Compact profile for easy installation in tight spaces
Applications
- Residential and commercial water supply systems
- Hydronic heating and plumbing protection
- Downstream fixture and appliance pressure management
- Boiler feed and make-up water lines
Why Choose the Watts LF174A?
Watts is a globally recognized leader in flow control and water quality products. The LF174A series pressure reducing valve combines lead-free compliance with robust performance, making it the go-to choice for contractors and engineers who demand reliability and code compliance in every installation. The full-size port design ensures optimal flow rates while maintaining precise pressure control downstream.
Specifications
- Brand: Watts
- SKU / Part Number: F121508
- Model Series: LF174A
- Pipe Size: 1 inch
- Inlet Pressure Rating: 150 PSI
- Design: Full Size (FS)
- Body Material: Lead-Free Brass
- Lead-Free Compliant: Yes (LF designation)









