Description
The Watts F121427 is a 1-inch lead free automatic reseating temperature and pressure (T&P) relief valve engineered for dependable overpressure and overtemperature protection in residential and light commercial water heating applications. Designed to meet the demands of modern plumbing and hydronic systems, this valve delivers peace of mind with its automatic reseating function, eliminating the need for manual reset after an actuation event.
Key Features
- Lead free construction — compliant with low-lead content requirements for potable water systems
- Automatic reseating design — valve reseats itself after relieving, reducing service interruptions
- 1-inch inlet connection for straightforward installation on standard water heater and boiler outlets
- 125 psi pressure rating — provides reliable pressure relief at the set point
- 210°F temperature rating — activates thermal relief before dangerous overheating occurs
- 7-inch coated thermostat element — extends into the tank for accurate temperature sensing
- Discharge line flood sensor included — monitors for discharge events and helps prevent water damage
Product Specifications
- SKU: F121427
- Model: LF40XL-7
- Brand: Watts
- Connection Size: 1 inch
- Pressure Setting: 125 psi
- Temperature Setting: 210°F
- Thermostat Length: 7 inches (coated)
- Lead Free: Yes
- Reseating Type: Automatic
- Includes: Discharge line flood sensor
Application
The Watts LF40XL-7 is ideal for use on residential and commercial water heaters, storage tanks, and hydronic boilers where both temperature and pressure protection are required. The included discharge line flood sensor adds an extra layer of protection by alerting occupants or building management systems when the valve has discharged, helping to minimize water damage and enabling prompt maintenance response.
Why Choose Watts?
Watts is a globally recognized leader in flow control and water quality products. The LF40XL series T&P relief valves are built to rigorous standards, ensuring long service life and consistent performance in demanding HVAC and plumbing environments.
