Watts 0124180 Valve

The Watts 0124180 Valve is a 3/4" temperature and pressure relief valve designed for critical protection in water heater and hot water storage tank applications. This 100XL-3-75 model is engineered to handle systems up to 100,000 BTU/hr (CSA rated) and features a standard 75 PSI pressure relief setting with a 210°F maximum temperature threshold. For technicians cross-referencing legacy hardware, the 0124180 is identical to 0066080, the 100XL-3-75, and the lead-free equivalent LF100XL-075210-3/4. The unit utilizes a durable lead-free copper silicon alloy body and a stainless steel spring to ensure long-term structural integrity against corrosive water conditions. The thermo-bonded coating on the thermostat provides precise sensing accuracy for automatic discharge when system limits are exceeded. With its MNPT inlet and FNPT outlet, this Watts T&P relief valve serves as a direct drop-in replacement for residential and light commercial boilder and heater safety setups.

• Dual-Action Safety: Provides integrated protection against both excessive temperature and high-pressure surges in a single 3/4 inch NPT fitting.
• High BTU Capacity: Rated for heaters up to 100,000 BTU, making it compatible with most standard residential storage tanks.
• Proven Reliability: Features an ASME rated and CSA listed bronze body construction with a test lever for manual inspection and verification.
• Precision Sensing: Equipped with a unique thermo-bonded thermostat that ensures accurate temperature discharge at exactly 210 degrees Fahrenheit.

• What is the difference between 0124180 and lead-free models? The 0124180 is functionally identical to the LF100XL-3-75 and LF100XL-075210, meeting modern lead-free requirements for potable water systems.
• Can I use this valve for systems over 100,000 BTU? No, this specific model is rated for a maximum steam discharge of 100,000 BTU/hr. For larger commercial tanks, specify a higher-capacity Watts series.
• Where should the sensing probe be located? For proper operation, the temperature sensing element must be submerged in the top 6 inches of the tank to accurately detect the hottest water.

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.