Description
The Watts F121448 is a 3/4″ lead-free automatic reseating temperature and pressure (T&P) relief valve engineered for reliable overpressure and overtemperature protection in water heating and hydronic applications. Rated at 125 psi and 210°F, this valve is designed to open automatically when either pressure or temperature exceeds safe operating limits, then reseat cleanly once conditions return to normal — helping to prevent system damage and ensuring long-term safety.
Key Features
- Lead-free construction (LF140S-3) — compliant with low-lead potable water regulations
- Automatic reseating design — valve resets after actuation without manual intervention
- 3/4″ connection size for standard water heater and boiler installations
- Rated pressure: 125 psi maximum working pressure
- Rated temperature: 210°F maximum temperature setting
- 3″ coated thermostat element for accurate temperature sensing
- Discharge line flood sensor included — detects unwanted valve discharge at the drain line
Application
Ideal for residential and light commercial water heaters, storage tanks, and hydronic heating systems where both temperature and pressure relief protection is required. The included discharge line flood sensor adds an extra layer of protection by alerting users to valve discharge events, helping prevent water damage and flagging potential system issues early.
Specifications
- Brand: Watts
- Model: LF140S-3
- SKU: F121448
- Connection Size: 3/4″
- Pressure Rating: 125 psi
- Temperature Rating: 210°F
- Thermostat Length: 3″ coated
- Lead-Free: Yes
- Discharge Line Flood Sensor: Included
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