Description
The Watts F121587 LFN240X-9 is a 1-inch lead-free temperature and pressure (T&P) relief valve engineered to provide dependable overpressure and overtemperature protection in residential and light commercial hydronic heating systems, water heaters, and boiler applications. With a maximum working pressure of 125 PSI and a rated capacity of 3,438,000 BTU/hr, this valve is built to handle demanding system requirements while keeping installations compliant with lead-free plumbing standards.
The “LF” designation confirms the valve is constructed with lead-free materials, meeting the requirements of NSF/ANSI 61 and applicable federal and state lead-free mandates — making it suitable for potable water systems and installations where lead-free compliance is required.
Key Features
- Lead-free construction — compliant with federal and state lead-free regulations
- 1″ inlet connection for straightforward installation in standard piping systems
- 125 PSI maximum working pressure rating
- 3,438,000 BTU/hr (3,438 MBH) rated discharge capacity
- Temperature and pressure relief in a single valve — simplifies installation
- Designed for use on water heaters, boilers, and hydronic heating systems
- Watts quality construction for long-term reliability and consistent performance
Specifications
- Brand: Watts
- Model: LFN240X-9
- SKU: F121587
- Connection Size: 1″
- Pressure Rating: 125 PSI
- BTU Capacity: 3,438,000 BTU/hr
- Construction: Lead-Free
- Valve Type: Temperature & Pressure (T&P) Relief Valve
Applications
- Residential and commercial water heaters
- Hydronic boilers and heating systems
- Potable water systems requiring lead-free compliance
- Any pressurized water system requiring T&P overpressure protection
