Description
The Watts F556015 is a 3/4″ lead-free automatic reseating temperature and pressure relief valve engineered for reliable protection in residential and commercial water heating applications. Rated at 125 psi and 210°F, this valve delivers dual-function safety by relieving both excess pressure and dangerously high temperatures — helping protect water heaters, boilers, and hydronic systems from catastrophic failure.
Key Features
- Lead-free construction — compliant with low-lead requirements for potable water systems
- Automatic reseating design — valve reseats after actuation, minimizing service interruptions
- 3/4″ connection size for standard water heater and boiler installations
- 125 psi pressure rating for high-demand system protection
- 210°F temperature rating for accurate thermal relief response
- 5″ coated thermostat element for precise temperature sensing
- Discharge line flood sensor included — provides early warning of valve discharge events
Product Specifications
- Model: LF40XL-5
- SKU: F556015
- Connection Size: 3/4″
- Pressure Rating: 125 psi
- Temperature Rating: 210°F
- Thermostat Length: 5″ (coated)
- Lead-Free: Yes
- Flood Sensor: Included with discharge line
Applications
- Residential and commercial water heaters
- Hydronic heating boilers
- Hot water storage tanks
- Closed-loop heating systems requiring T&P protection
Why Choose the Watts LF40XL-5?
Watts is a trusted name in flow control and water safety. The LF40XL-5 combines lead-free materials, automatic reseating convenience, and an integrated discharge line flood sensor — giving installers and building owners added peace of mind. The included flood sensor alerts to discharge events before they become costly water damage incidents, making this valve a smart choice for any safety-conscious installation.
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