Watts F121448 Valve

Upgrade your commercial hot water systems with the Watts F121448 Temperature & Pressure Relief Valve. This 3/4-inch LF140S-3 lead-free T&P valve is engineered for high-capacity protection of commercial storage tanks and water heaters. Rated for a 125 PSI pressure relief setpoint and 210°F temperature relief, this valve features an automatically reseating design that ensures the system returns to normal operation independently after a relief event. The lead-free copper silicon alloy body provides superior durability and compliance with strict potable water codes. Designed for direct installation into tank tappings, it includes a 3-inch nylon-coated thermostat probe for precise thermal sensing. A standout technical feature is the integrated SentryPlus Alert flood sensor, which detects excessive discharge in the drain line, allowing contractors to monitor potential system failures through a building management system or cellular gateway when paired with an activation kit.

Key Benefits for Contractors

• ASME Rated and CSA Listed: Meets rigorous industry standards for high-capacity commercial and institutional plumbing safety.
• Integrated Flood Detection: Built-in SentryPlus Alert technology enables proactive monitoring of relief events to prevent property damage.
• Corrosion Resistance: The lead-free copper silicon alloy construction and thermo-bonded coated thermostat are designed for long-term service in harsh water conditions.
• Tamper-Resistant Security: Includes tamper-resistant bonnet screws to prevent unauthorized field adjustments.
• Simplified Maintenance: Features a non-mechanical seat-to-disc alignment and a standard test lever for reliable seating and manual verification.

Common Questions

Is this valve compatible with existing building automation systems?
Yes, the Watts F121448 is designed for modern integration. While the sensor is included, a separate SentryPlus Alert activation kit is required to relay signals to a BMS via Modbus or the Watts Cellular Gateway.

Can the LF140S-3 be used in residential applications?
While it is primarily built for commercial hot water tanks and institutional heaters requiring higher relieving capacities, it is compatible with any system requiring a 3/4-inch NPT connections and a 125 PSI setpoint, provided local codes are followed.

What is the difference between the LF140S and the LF140X?
The LF140S-3 features a "short" 3-inch thermostat intended for direct tank tapping installation. The "X" version typically features an extended thermostat for installation in the hot water outlet piping away from the tank.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.