Watts 0121456 Valve

The Watts 0121456 is a professional-grade 140X-6-SS-125# temperature and pressure relief valve, serving as the updated, lead-free (LF) replacement for the legacy 0259685 model. Specifically engineered for high-capacity applications, this 1-inch T&P valve features a robust lead-free copper silicon alloy body and a 6-inch stainless steel thermostat tube to ensure long-term durability in aggressive water conditions. With a massive steam discharge capacity of 2,610,000 BTU/hr, it is designed to meet strict ASME Section XIII and ANSI Z21.22 standards for large commercial domestic hot water supply tanks. The Watts LF140X-6-125 is factory set at 125 PSI with a temperature relief threshold of 210°F. The automatic reseating design includes a test lever and tamper-resistant bonnet screws to maintain system integrity. This unit integrates seamlessly with discharge line flood sensors to provide early warning of excessive discharge when connected to a building management system.

Key Benefits

• High-Capacity Protection: Rated at 2,610,000 BTU/hr for reliable safety on large commercial storage tanks and boilers.
• Lead-Free Compliance: Constructed with Lead-Free copper silicon alloy to meet all potable water regulations and safety standards.
• Corrosion Resistance: Equipped with a 6-inch stainless steel thermostat that resists mineral buildup and ensures accurate thermal response.
• Automatic Reseating: Features a non-mechanical seat-to-disc alignment that allows the valve to reset independently after alleviating pressure or temperature spikes.
• Smart Integration: Compatible with SentryPlus Alert technology for remote monitoring of valve discharge events via BAS or cellular gateways.

Common Questions

Is the 0121456 a direct replacement for the 0259685?
Yes, the Watts 0121456 (LF140X6-125-1) is the current lead-free version of the discontinued 0259685. It maintains the 1-inch NPT connection and 125 PSI rating required for high-volume commercial systems.

Can I install this valve in any position?
For maximum safety and performance, the valve should be installed directly into the tank tapping or in the hot water outlet line as close to the tank as possible. Always ensure the discharge line is piped to a safe disposal point and never install a shut-off valve between the tank and the relief valve.

Does this valve come with the flood sensor?
The LF140X-6 series often includes the flood sensor probe, but a separate activation kit (BMS or Cellular Gateway) is typically required to transmit alerts to your monitoring system.

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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.