Description
Watts LL40XL Temperature & Pressure Relief Valve — F121431
The Watts LL40XL is a heavy-duty temperature and pressure (T&P) relief valve engineered to provide dependable overpressure and overtemperature protection for commercial and residential boilers, water heaters, and hydronic heating systems. With a 1-inch connection, a 150 PSI pressure rating, and a robust BTU capacity of 2,134,000, this valve is built to handle demanding system requirements with confidence.
Key Features
- Model: LL40XL
- Connection Size: 1 inch
- Pressure Rating: 150 PSI
- BTU Capacity: 2,134,000 BTU/hr
- Function: Combined temperature and pressure relief (T&P)
- Brand: Watts — a trusted name in flow control and safety products
Application & Benefits
Designed for use on boilers, storage water heaters, and hydronic systems, the LL40XL automatically opens to discharge water when system pressure or temperature exceeds safe operating limits — protecting equipment, piping, and personnel from potentially dangerous overpressure conditions. The 2,134,000 BTU rating makes it well-suited for larger commercial and industrial heating applications where high-capacity protection is essential.
Why Choose the Watts LL40XL?
- High BTU capacity ideal for commercial boiler and water heater installations
- 150 PSI pressure setting provides a wide operating safety margin
- 1-inch connection for straightforward installation into standard piping
- Manufactured by Watts, a globally recognized leader in plumbing, flow control, and water quality products
- Helps maintain system compliance with safety codes and standards
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